diff --git a/.github/workflows/Linux_x86_64_SDL3_test.yml b/.github/workflows/Linux_x86_64_SDL3_test.yml
index fd9d2bfd9..ee7048e4e 100644
--- a/.github/workflows/Linux_x86_64_SDL3_test.yml
+++ b/.github/workflows/Linux_x86_64_SDL3_test.yml
@@ -36,8 +36,8 @@ jobs:
       uses: actions/cache@v4
       with:
         path: build
-        key: ${{ github.workflow }}-v2-${{ github.sha }}
-        restore-keys: ${{ github.workflow }}-v2-
+        key: ${{ github.workflow }}-v3-${{ github.sha }}
+        restore-keys: ${{ github.workflow }}-v3-
 
     # We specify `-DDEVILUTIONX_SYSTEM_BENCHMARK=OFF` to work around the following error:
     # lto1: fatal error: bytecode stream in file ‘/usr/lib/x86_64-linux-gnu/libbenchmark_main.a’ generated with LTO version 11.2 instead of the expected 11.3
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 21a014c29..4cf2b8a9b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -112,7 +112,12 @@ endif()
 
 # Graphics options
 if(NOT USE_SDL1)
-  set(DEVILUTIONX_DISPLAY_TEXTURE_FORMAT "SDL_PIXELFORMAT_RGB888" CACHE STRING "Texture format for DevilutionX textures when using the GPU renderer")
+if(USE_SDL3)
+  set(_texture_format_default "SDL_PIXELFORMAT_XRGB8888")
+else()
+  set(_texture_format_default "SDL_PIXELFORMAT_RGB888")
+endif()
+  set(DEVILUTIONX_DISPLAY_TEXTURE_FORMAT "${_texture_format_default}" CACHE STRING "Texture format for DevilutionX textures when using the GPU renderer")
   mark_as_advanced(DEVILUTIONX_DISPLAY_TEXTURE_FORMAT)
 endif()
 
diff --git a/Source/DiabloUI/button.cpp b/Source/DiabloUI/button.cpp
index 8d4c8c813..07ddc6d98 100644
--- a/Source/DiabloUI/button.cpp
+++ b/Source/DiabloUI/button.cpp
@@ -2,7 +2,12 @@
 
 #include <optional>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_mouse.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "DiabloUI/diabloui.h"
 #include "DiabloUI/ui_flags.hpp"
@@ -60,13 +65,21 @@ bool HandleMouseEventButton(const SDL_Event &event, UiButton *button)
 	if (event.button.button != SDL_BUTTON_LEFT)
 		return false;
 	switch (event.type) {
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_BUTTON_UP:
+#else
 	case SDL_MOUSEBUTTONUP:
+#endif
 		if (button->IsPressed()) {
 			button->Activate();
 			return true;
 		}
 		return false;
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_BUTTON_DOWN:
+#else
 	case SDL_MOUSEBUTTONDOWN:
+#endif
 		button->Press();
 		return true;
 	default:
diff --git a/Source/DiabloUI/credits.cpp b/Source/DiabloUI/credits.cpp
index 4b873ec63..84aa2ea91 100644
--- a/Source/DiabloUI/credits.cpp
+++ b/Source/DiabloUI/credits.cpp
@@ -6,7 +6,14 @@
 #include <string_view>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_timer.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "DiabloUI/credits_lines.h"
 #include "DiabloUI/diabloui.h"
@@ -102,7 +109,11 @@ void CreditsRenderer::Render()
 		return;
 	prev_offset_y_ = offsetY;
 
+#ifdef USE_SDL3
+	SDL_FillSurfaceRect(DiabloUiSurface(), nullptr, 0);
+#else
 	SDL_FillRect(DiabloUiSurface(), nullptr, 0x000000);
+#endif
 	const Point uiPosition = GetUIRectangle().position;
 	if (ArtBackgroundWidescreen)
 		RenderClxSprite(Surface(DiabloUiSurface()), (*ArtBackgroundWidescreen)[0], uiPosition - Displacement { 320, 0 });
@@ -152,10 +163,15 @@ bool TextDialog(const char *const *text, std::size_t textLines)
 	do {
 		creditsRenderer.Render();
 		UiFadeIn();
-		while (PollEvent(&event) != 0) {
+		while (PollEvent(&event)) {
 			switch (event.type) {
+#ifdef USE_SDL3
+			case SDL_EVENT_KEY_DOWN:
+			case SDL_EVENT_MOUSE_BUTTON_UP:
+#else
 			case SDL_KEYDOWN:
 			case SDL_MOUSEBUTTONUP:
+#endif
 				endMenu = true;
 				break;
 			default:
diff --git a/Source/DiabloUI/diabloui.cpp b/Source/DiabloUI/diabloui.cpp
index a083811aa..cbcab0ca4 100644
--- a/Source/DiabloUI/diabloui.cpp
+++ b/Source/DiabloUI/diabloui.cpp
@@ -10,7 +10,16 @@
 #include <string_view>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_keyboard.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_timer.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <function_ref.hpp>
 
 #include "DiabloUI/button.h"
@@ -401,17 +410,34 @@ void UiOnBackgroundChange()
 	// of single-player characters.
 	//
 	// Black out the screen immediately to make it appear more smooth.
+#ifdef USE_SDL3
+	SDL_FillSurfaceRect(DiabloUiSurface(), nullptr, 0);
+#else
 	SDL_FillRect(DiabloUiSurface(), nullptr, 0x000000);
+#endif
 	if (DiabloUiSurface() == PalSurface)
 		BltFast(nullptr, nullptr);
 	RenderPresent();
 }
 
-} // namespace
-
 void UiFocusNavigation(SDL_Event *event)
 {
 	switch (event->type) {
+#ifdef USE_SDL3
+	case SDL_EVENT_KEY_UP:
+	case SDL_EVENT_MOUSE_BUTTON_UP:
+	case SDL_EVENT_MOUSE_MOTION:
+	case SDL_EVENT_MOUSE_WHEEL:
+	case SDL_EVENT_JOYSTICK_BUTTON_UP:
+	case SDL_EVENT_JOYSTICK_AXIS_MOTION:
+	case SDL_EVENT_JOYSTICK_BALL_MOTION:
+	case SDL_EVENT_JOYSTICK_HAT_MOTION:
+	case SDL_EVENT_FINGER_UP:
+	case SDL_EVENT_FINGER_MOTION:
+	case SDL_EVENT_GAMEPAD_BUTTON_UP:
+	case SDL_EVENT_GAMEPAD_AXIS_MOTION:
+	case SDL_EVENT_WINDOW_EXPOSED:
+#else
 	case SDL_KEYUP:
 	case SDL_MOUSEBUTTONUP:
 	case SDL_MOUSEMOTION:
@@ -430,8 +456,11 @@ void UiFocusNavigation(SDL_Event *event)
 	case SDL_WINDOWEVENT:
 #endif
 	case SDL_SYSWMEVENT:
+#endif
 		mainmenu_restart_repintro();
 		break;
+	default:
+		break;
 	}
 
 	bool menuActionHandled = false;
@@ -440,7 +469,16 @@ void UiFocusNavigation(SDL_Event *event)
 	if (menuActionHandled)
 		return;
 
-#if SDL_VERSION_ATLEAST(2, 0, 0)
+#ifdef USE_SDL3
+	if (event->type == SDL_EVENT_MOUSE_WHEEL) {
+		if (event->wheel.integer_y > 0) {
+			UiFocusUp();
+		} else if (event->wheel.integer_y < 0) {
+			UiFocusDown();
+		}
+		return;
+	}
+#elif SDL_VERSION_ATLEAST(2, 0, 0)
 	if (event->type == SDL_MOUSEWHEEL) {
 		if (event->wheel.y > 0) {
 			UiFocusUp();
@@ -466,15 +504,29 @@ void UiFocusNavigation(SDL_Event *event)
 		return;
 	}
 
-	if (event->type == SDL_MOUSEBUTTONDOWN || event->type == SDL_MOUSEBUTTONUP) {
-		if (UiItemMouseEvents(event, gUiItems))
-			return;
+	if (IsAnyOf(event->type,
+#ifdef USE_SDL3
+	        SDL_EVENT_MOUSE_BUTTON_DOWN, SDL_EVENT_MOUSE_BUTTON_UP
+#else
+	        SDL_MOUSEBUTTONDOWN, SDL_MOUSEBUTTONUP
+#endif
+	        )
+	    && UiItemMouseEvents(event, gUiItems)) {
+		return;
 	}
 }
 
+} // namespace
+
 void UiHandleEvents(SDL_Event *event)
 {
-	if (event->type == SDL_MOUSEMOTION) {
+	if (event->type ==
+#ifdef USE_SDL3
+	    SDL_EVENT_MOUSE_MOTION
+#else
+	    SDL_MOUSEMOTION
+#endif
+	) {
 #ifdef USE_SDL1
 		OutputToLogical(&event->motion.x, &event->motion.y);
 #endif
@@ -482,8 +534,13 @@ void UiHandleEvents(SDL_Event *event)
 		return;
 	}
 
-	if (event->type == SDL_KEYDOWN && event->key.keysym.sym == SDLK_RETURN) {
-		const Uint8 *state = SDLC_GetKeyState();
+#ifdef USE_SDL3
+	if (event->type == SDL_EVENT_KEY_DOWN && event->key.key == SDLK_RETURN)
+#else
+	if (event->type == SDL_KEYDOWN && event->key.keysym.sym == SDLK_RETURN)
+#endif
+	{
+		const auto *state = SDLC_GetKeyState();
 		if (state[SDLC_KEYSTATE_LALT] != 0 || state[SDLC_KEYSTATE_RALT] != 0) {
 			GetOptions().Graphics.fullscreen.SetValue(!IsFullScreen());
 			SaveOptions();
@@ -493,12 +550,41 @@ void UiHandleEvents(SDL_Event *event)
 		}
 	}
 
-	if (event->type == SDL_QUIT)
+	if (event->type ==
+#ifdef USE_SDL3
+	    SDL_EVENT_QUIT
+#else
+	    SDL_QUIT
+#endif
+	) {
 		diablo_quit(0);
+	}
 
 #ifndef USE_SDL1
 	HandleControllerAddedOrRemovedEvent(*event);
 
+#ifdef USE_SDL3
+	switch (event->type) {
+	case SDL_EVENT_WINDOW_SHOWN:
+	case SDL_EVENT_WINDOW_EXPOSED:
+	case SDL_EVENT_WINDOW_RESTORED:
+		gbActive = true;
+		break;
+	case SDL_EVENT_WINDOW_HIDDEN:
+	case SDL_EVENT_WINDOW_MINIMIZED:
+		gbActive = false;
+		break;
+	case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED:
+		DoReinitializeHardwareCursor();
+		break;
+	case SDL_EVENT_WINDOW_FOCUS_LOST:
+		if (*GetOptions().Gameplay.pauseOnFocusLoss) music_mute();
+		break;
+	case SDL_EVENT_WINDOW_FOCUS_GAINED:
+		if (*GetOptions().Gameplay.pauseOnFocusLoss) diablo_focus_unpause();
+		break;
+	}
+#else
 	if (event->type == SDL_WINDOWEVENT) {
 		if (IsAnyOf(event->window.event, SDL_WINDOWEVENT_SHOWN, SDL_WINDOWEVENT_EXPOSED, SDL_WINDOWEVENT_RESTORED)) {
 			gbActive = true;
@@ -517,6 +603,7 @@ void UiHandleEvents(SDL_Event *event)
 			diablo_focus_unpause();
 		}
 	}
+#endif
 #else
 	if (event->type == SDL_ACTIVEEVENT && (event->active.state & SDL_APPINPUTFOCUS) != 0) {
 		if (event->active.gain == 0)
@@ -786,14 +873,19 @@ void DrawSelector(const SDL_Rect &rect)
 
 void UiClearScreen()
 {
-	if (!ArtBackground || gnScreenWidth > (*ArtBackground)[0].width() || gnScreenHeight > (*ArtBackground)[0].height())
+	if (!ArtBackground || gnScreenWidth > (*ArtBackground)[0].width() || gnScreenHeight > (*ArtBackground)[0].height()) {
+#ifdef USE_SDL3
+		SDL_FillSurfaceRect(DiabloUiSurface(), nullptr, 0);
+#else
 		SDL_FillRect(DiabloUiSurface(), nullptr, 0x000000);
+#endif
+	}
 }
 
 void UiPollAndRender(std::optional<tl::function_ref<bool(SDL_Event &)>> eventHandler)
 {
 	SDL_Event event;
-	while (PollEvent(&event) != 0) {
+	while (PollEvent(&event)) {
 		if (eventHandler && (*eventHandler)(event))
 			continue;
 		UiFocusNavigation(&event);
@@ -942,7 +1034,13 @@ void Render(const UiEdit &uiEdit)
 
 bool HandleMouseEventArtTextButton(const SDL_Event &event, const UiArtTextButton *uiButton)
 {
-	if (event.type != SDL_MOUSEBUTTONUP || event.button.button != SDL_BUTTON_LEFT) {
+	if (event.type !=
+#ifdef USE_SDL3
+	        SDL_EVENT_MOUSE_BUTTON_UP
+#else
+	        SDL_MOUSEBUTTONUP
+#endif
+	    || event.button.button != SDL_BUTTON_LEFT) {
 		return false;
 	}
 
@@ -959,17 +1057,37 @@ bool HandleMouseEventList(const SDL_Event &event, UiList *uiList)
 	if (event.button.button != SDL_BUTTON_LEFT)
 		return false;
 
-	if (event.type != SDL_MOUSEBUTTONUP && event.type != SDL_MOUSEBUTTONDOWN)
+	if (!IsAnyOf(event.type,
+#ifdef USE_SDL3
+	        SDL_EVENT_MOUSE_BUTTON_UP, SDL_EVENT_MOUSE_BUTTON_DOWN
+#else
+	        SDL_MOUSEBUTTONUP, SDL_MOUSEBUTTONDOWN
+#endif
+	        )) {
 		return false;
+	}
 
 	std::size_t index = uiList->indexAt(event.button.y);
-	if (event.type == SDL_MOUSEBUTTONDOWN) {
+	if (event.type ==
+#ifdef USE_SDL3
+	    SDL_EVENT_MOUSE_BUTTON_DOWN
+#else
+	    SDL_MOUSEBUTTONDOWN
+#endif
+	) {
 		uiList->Press(index);
 		return true;
 	}
 
-	if (event.type == SDL_MOUSEBUTTONUP && !uiList->IsPressed(index))
+	if (event.type ==
+#ifdef USE_SDL3
+	        SDL_EVENT_MOUSE_BUTTON_UP
+#else
+	        SDL_MOUSEBUTTONUP
+#endif
+	    && !uiList->IsPressed(index)) {
 		return false;
+	}
 
 	index += listOffset;
 
@@ -998,7 +1116,13 @@ bool HandleMouseEventScrollBar(const SDL_Event &event, const UiScrollbar *uiSb)
 {
 	if (event.button.button != SDL_BUTTON_LEFT)
 		return false;
-	if (event.type == SDL_MOUSEBUTTONUP) {
+	if (event.type ==
+#ifdef USE_SDL3
+	    SDL_EVENT_MOUSE_BUTTON_UP
+#else
+	    SDL_MOUSEBUTTONUP
+#endif
+	) {
 		if (scrollBarState.upArrowPressed && IsInsideRect(event, UpArrowRect(*uiSb))) {
 			UiFocusUp();
 			return true;
@@ -1007,7 +1131,14 @@ bool HandleMouseEventScrollBar(const SDL_Event &event, const UiScrollbar *uiSb)
 			UiFocusDown();
 			return true;
 		}
-	} else if (event.type == SDL_MOUSEBUTTONDOWN) {
+	} else if (event.type ==
+#ifdef USE_SDL3
+	    SDL_EVENT_MOUSE_BUTTON_DOWN
+#else
+	    SDL_MOUSEBUTTONDOWN
+#endif
+
+	) {
 		if (IsInsideRect(event, BarRect(*uiSb))) {
 			// Scroll up or down based on thumb position.
 			const SDL_Rect thumbRect = ThumbRect(*uiSb, SelectedItem, SelectedItemMax + 1);
@@ -1116,7 +1247,13 @@ bool UiItemMouseEvents(SDL_Event *event, const std::vector<UiItemBase *> &items)
 		}
 	}
 
-	if (event->type == SDL_MOUSEBUTTONUP && event->button.button == SDL_BUTTON_LEFT) {
+	if (event->type ==
+#ifdef USE_SDL3
+	        SDL_EVENT_MOUSE_BUTTON_UP
+#else
+	        SDL_MOUSEBUTTONUP
+#endif
+	    && event->button.button == SDL_BUTTON_LEFT) {
 		scrollBarState.downArrowPressed = scrollBarState.upArrowPressed = false;
 		for (const auto &item : items) {
 			if (item->IsType(UiType::Button)) {
@@ -1149,7 +1286,13 @@ bool UiItemMouseEvents(SDL_Event *event, const std::vector<std::unique_ptr<UiIte
 		}
 	}
 
-	if (event->type == SDL_MOUSEBUTTONUP && event->button.button == SDL_BUTTON_LEFT) {
+	if (event->type ==
+#ifdef USE_SDL3
+	        SDL_EVENT_MOUSE_BUTTON_UP
+#else
+	        SDL_MOUSEBUTTONUP
+#endif
+	    && event->button.button == SDL_BUTTON_LEFT) {
 		scrollBarState.downArrowPressed = scrollBarState.upArrowPressed = false;
 		for (const auto &item : items) {
 			if (item->IsType(UiType::Button)) {
diff --git a/Source/DiabloUI/diabloui.h b/Source/DiabloUI/diabloui.h
index 8bac87a6b..61c5cd7a8 100644
--- a/Source/DiabloUI/diabloui.h
+++ b/Source/DiabloUI/diabloui.h
@@ -5,7 +5,13 @@
 #include <cstdint>
 #include <optional>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_surface.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <function_ref.hpp>
 
 #include "DiabloUI/ui_item.h"
diff --git a/Source/DiabloUI/dialogs.cpp b/Source/DiabloUI/dialogs.cpp
index 711690182..10f915b3a 100644
--- a/Source/DiabloUI/dialogs.cpp
+++ b/Source/DiabloUI/dialogs.cpp
@@ -7,7 +7,16 @@
 #include <string_view>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_messagebox.h>
+#include <SDL3/SDL_mouse.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "DiabloUI/button.h"
 #include "DiabloUI/diabloui.h"
@@ -68,7 +77,13 @@ bool Init(std::string_view caption, std::string_view text, bool error, bool rend
 {
 	if (!renderBehind) {
 		if (!UiLoadBlackBackground()) {
-			if (SDL_ShowCursor(SDL_ENABLE) <= -1)
+			if (
+#ifdef USE_SDL3
+			    SDL_ShowCursor()
+#else
+			    SDL_ShowCursor(SDL_ENABLE) <= -1
+#endif
+			)
 				LogError("{}", SDL_GetError());
 		}
 	}
@@ -123,10 +138,15 @@ void DialogLoop(const std::vector<std::unique_ptr<UiItemBase>> &items, const std
 	SDL_Event event;
 	dialogEnd = false;
 	do {
-		while (PollEvent(&event) != 0) {
+		while (PollEvent(&event)) {
 			switch (event.type) {
+#ifdef USE_SDL3
+			case SDL_EVENT_MOUSE_BUTTON_DOWN:
+			case SDL_EVENT_MOUSE_BUTTON_UP:
+#else
 			case SDL_MOUSEBUTTONDOWN:
 			case SDL_MOUSEBUTTONUP:
+#endif
 				UiItemMouseEvents(&event, items);
 				break;
 			default:
@@ -162,8 +182,15 @@ void UiOkDialog(std::string_view caption, std::string_view text, bool error, con
 
 	if (!gbActive || inDialog) {
 		if (!HeadlessMode) {
-			if (SDL_ShowCursor(SDL_ENABLE) <= -1)
+			if (
+#ifdef USE_SDL3
+			    SDL_ShowCursor()
+#else
+			    SDL_ShowCursor(SDL_ENABLE) <= -1
+#endif
+			) {
 				LogError("{}", SDL_GetError());
+			}
 			const std::string captionStr = std::string(caption);
 			const std::string textStr = std::string(text);
 			if (SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, captionStr.c_str(), textStr.c_str(), nullptr) <= -1) {
@@ -174,21 +201,38 @@ void UiOkDialog(std::string_view caption, std::string_view text, bool error, con
 	}
 
 	if (IsHardwareCursor()) {
-		if (SDL_ShowCursor(SDL_ENABLE) <= -1)
+		if (
+#ifdef USE_SDL3
+		    SDL_ShowCursor()
+#else
+		    SDL_ShowCursor(SDL_ENABLE) <= -1
+#endif
+		) {
 			LogError("{}", SDL_GetError());
+		}
 	}
 
 	if (!Init(caption, text, error, !renderBehind.empty())) {
 		LogError("{}\n{}", caption, text);
 		const std::string captionStr = std::string(caption);
 		const std::string textStr = std::string(text);
-		if (SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, captionStr.c_str(), textStr.c_str(), nullptr) <= -1) {
+		if (
+#ifdef USE_SDL3
+		    !SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, captionStr.c_str(), textStr.c_str(), nullptr)
+#else
+		    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, captionStr.c_str(), textStr.c_str(), nullptr) <= -1
+#endif
+		) {
 			LogError("{}", SDL_GetError());
 		}
 	}
 
 	inDialog = true;
+#ifdef USE_SDL3
+	SDL_SetSurfaceClipRect(DiabloUiSurface(), nullptr);
+#else
 	SDL_SetClipRect(DiabloUiSurface(), nullptr);
+#endif
 	DialogLoop(vecOkDialog, renderBehind);
 	Deinit();
 	inDialog = false;
diff --git a/Source/DiabloUI/hero/selhero.cpp b/Source/DiabloUI/hero/selhero.cpp
index 093caa11e..bb3287c41 100644
--- a/Source/DiabloUI/hero/selhero.cpp
+++ b/Source/DiabloUI/hero/selhero.cpp
@@ -10,7 +10,12 @@
 #include <utility>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_rect.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <fmt/core.h>
 
 #include "DiabloUI/diabloui.h"
diff --git a/Source/DiabloUI/mainmenu.cpp b/Source/DiabloUI/mainmenu.cpp
index 3405253f4..deff63fc8 100644
--- a/Source/DiabloUI/mainmenu.cpp
+++ b/Source/DiabloUI/mainmenu.cpp
@@ -4,7 +4,12 @@
 #include <optional>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_timer.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "DiabloUI/diabloui.h"
 #include "DiabloUI/ui_flags.hpp"
diff --git a/Source/DiabloUI/multi/selconn.cpp b/Source/DiabloUI/multi/selconn.cpp
index 65e8d4e50..020901aab 100644
--- a/Source/DiabloUI/multi/selconn.cpp
+++ b/Source/DiabloUI/multi/selconn.cpp
@@ -4,7 +4,12 @@
 #include <string_view>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_rect.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <fmt/core.h>
 
 #include "DiabloUI/diabloui.h"
diff --git a/Source/DiabloUI/multi/selgame.cpp b/Source/DiabloUI/multi/selgame.cpp
index 4955923c4..52914f1c7 100644
--- a/Source/DiabloUI/multi/selgame.cpp
+++ b/Source/DiabloUI/multi/selgame.cpp
@@ -9,7 +9,14 @@
 #include <string_view>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_timer.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <fmt/core.h>
 
 #include "DiabloUI/diabloui.h"
diff --git a/Source/DiabloUI/progress.cpp b/Source/DiabloUI/progress.cpp
index a613275be..0c129292c 100644
--- a/Source/DiabloUI/progress.cpp
+++ b/Source/DiabloUI/progress.cpp
@@ -2,7 +2,13 @@
 #include <optional>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "DiabloUI/button.h"
 #include "DiabloUI/diabloui.h"
@@ -71,7 +77,11 @@ Point GetPosition()
 
 void ProgressRenderBackground()
 {
+#ifdef USE_SDL3
+	SDL_FillSurfaceRect(DiabloUiSurface(), nullptr, 0);
+#else
 	SDL_FillRect(DiabloUiSurface(), nullptr, 0x000000);
+#endif
 
 	const Surface &out = Surface(DiabloUiSurface());
 	const Point position = GetPosition();
@@ -128,19 +138,36 @@ bool UiProgressDialog(int (*fnfunc)())
 		DrawMouse();
 		UiFadeIn();
 
-		while (PollEvent(&event) != 0) {
+		while (PollEvent(&event)) {
 			switch (event.type) {
+#ifdef USE_SDL3
+			case SDL_EVENT_MOUSE_BUTTON_DOWN:
+			case SDL_EVENT_MOUSE_BUTTON_UP:
+#else
 			case SDL_MOUSEBUTTONDOWN:
 			case SDL_MOUSEBUTTONUP:
+#endif
 				UiItemMouseEvents(&event, vecProgress);
 				break;
+#ifdef USE_SDL3
+			case SDL_EVENT_KEY_DOWN:
+				switch (event.key.key)
+#else
+			case SDL_KEYDOWN:
+				switch (event.key.keysym.sym)
+#endif
+				{
 #ifndef USE_SDL1
-			case SDLK_KP_ENTER:
+				case SDLK_KP_ENTER:
 #endif
-			case SDLK_ESCAPE:
-			case SDLK_RETURN:
-			case SDLK_SPACE:
-				endMenu = true;
+				case SDLK_ESCAPE:
+				case SDLK_RETURN:
+				case SDLK_SPACE:
+					endMenu = true;
+					break;
+				default:
+					break;
+				}
 				break;
 			default:
 				for (const MenuAction menuAction : GetMenuActions(event)) {
diff --git a/Source/DiabloUI/selok.cpp b/Source/DiabloUI/selok.cpp
index f75d681e5..dd470be9e 100644
--- a/Source/DiabloUI/selok.cpp
+++ b/Source/DiabloUI/selok.cpp
@@ -5,7 +5,11 @@
 #include <optional>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_rect.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "DiabloUI/diabloui.h"
 #include "DiabloUI/ui_flags.hpp"
diff --git a/Source/DiabloUI/title.cpp b/Source/DiabloUI/title.cpp
index 02babab0f..94a543876 100644
--- a/Source/DiabloUI/title.cpp
+++ b/Source/DiabloUI/title.cpp
@@ -77,7 +77,7 @@ void UiTitleDialog()
 
 		discord_manager::UpdateMenu();
 
-		while (PollEvent(&event) != 0) {
+		while (PollEvent(&event)) {
 			if (c_any_of(GetMenuActions(event), [](MenuAction menuAction) { return menuAction != MenuAction_NONE; })) {
 				endMenu = true;
 				break;
diff --git a/Source/capture.cpp b/Source/capture.cpp
index 30993e15d..5aac1a156 100644
--- a/Source/capture.cpp
+++ b/Source/capture.cpp
@@ -9,7 +9,14 @@
 #include <cstring>
 #include <ctime>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_iostream.h>
+#include <SDL3/SDL_timer.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <expected.hpp>
 
 #define DEVILUTIONX_SCREENSHOT_FORMAT_PCX 0
@@ -34,7 +41,12 @@
 namespace devilution {
 namespace {
 
-SDL_RWops *CaptureFile(std::string *dstPath)
+#ifdef USE_SDL3
+SDL_IOStream *
+#else
+SDL_RWops *
+#endif
+CaptureFile(std::string *dstPath)
 {
 	const char *ext =
 #if DEVILUTIONX_SCREENSHOT_FORMAT == DEVILUTIONX_SCREENSHOT_FORMAT_PCX
@@ -55,7 +67,11 @@ SDL_RWops *CaptureFile(std::string *dstPath)
 		i++;
 		*dstPath = StrCat(paths::PrefPath(), filename, "-", i, ext);
 	}
+#ifdef USE_SDL3
+	return SDL_IOFromFile(dstPath->c_str(), "wb");
+#else
 	return SDL_RWFromFile(dstPath->c_str(), "wb");
+#endif
 }
 
 /**
@@ -79,7 +95,7 @@ void CaptureScreen()
 	std::string fileName;
 	const uint32_t startTime = SDL_GetTicks();
 
-	SDL_RWops *outStream = CaptureFile(&fileName);
+	auto *outStream = CaptureFile(&fileName);
 	if (outStream == nullptr) {
 		LogError("Failed to open {} for writing: {}", fileName, SDL_GetError());
 		SDL_ClearError();
diff --git a/Source/control.cpp b/Source/control.cpp
index 31cbf88e4..288cdcb8e 100644
--- a/Source/control.cpp
+++ b/Source/control.cpp
@@ -15,6 +15,7 @@
 
 #ifdef USE_SDL3
 #include <SDL3/SDL_events.h>
+#include <SDL3/SDL_keyboard.h>
 #include <SDL3/SDL_keycode.h>
 #include <SDL3/SDL_rect.h>
 #else
@@ -1248,7 +1249,14 @@ void CheckMainPanelButton()
 	SetPanelObjectPosition(UiPanels::Main, spellSelectButton);
 
 	if (!SpellSelectFlag && spellSelectButton.contains(MousePosition)) {
-		if ((SDL_GetModState() & KMOD_SHIFT) != 0) {
+		if ((SDL_GetModState() &
+#ifdef USE_SDL3
+		        SDL_KMOD_SHIFT
+#else
+		        KMOD_SHIFT
+#endif
+		        )
+		    != 0) {
 			Player &myPlayer = *MyPlayer;
 			myPlayer._pRSpell = SpellID::Invalid;
 			myPlayer._pRSplType = SpellType::Invalid;
@@ -1922,21 +1930,31 @@ void TypeChatMessage()
 	    .value = TalkMessage,
 	    .cursor = &ChatCursor,
 	    .maxLength = sizeof(TalkMessage) - 1 });
-	SDL_Rect rect = MakeSdlRect(GetMainPanel().position.x + 200, GetMainPanel().position.y + 22, 0, 27);
-	SDL_SetTextInputRect(&rect);
 	for (bool &talkButtonDown : TalkButtonsDown) {
 		talkButtonDown = false;
 	}
 	sgbPlrTalkTbl = GetMainPanel().size.height + PanelPaddingHeight;
 	RedrawEverything();
 	TalkSaveIndex = NextTalkSave;
+
+	SDL_Rect rect = MakeSdlRect(GetMainPanel().position.x + 200, GetMainPanel().position.y + 22, 0, 27);
+#ifdef USE_SDL3
+	SDL_SetTextInputArea(ghMainWnd, &rect, /*cursor=*/0);
+	SDL_StartTextInput(ghMainWnd);
+#else
+	SDL_SetTextInputRect(&rect);
 	SDL_StartTextInput();
+#endif
 }
 
 void ResetChat()
 {
 	ChatFlag = false;
+#ifdef USE_SDL3
+	SDL_StopTextInput(ghMainWnd);
+#else
 	SDL_StopTextInput();
+#endif
 	ChatCursor = {};
 	ChatInputState = std::nullopt;
 	sgbPlrTalkTbl = 0;
@@ -2042,14 +2060,22 @@ void OpenGoldDrop(int8_t invIndex, int max)
 	    .min = 0,
 	    .max = max,
 	});
+#ifdef USE_SDL3
+	SDL_StartTextInput(ghMainWnd);
+#else
 	SDL_StartTextInput();
+#endif
 }
 
 void CloseGoldDrop()
 {
 	if (!DropGoldFlag)
 		return;
+#ifdef USE_SDL3
+	SDL_StopTextInput(ghMainWnd);
+#else
 	SDL_StopTextInput();
+#endif
 	DropGoldFlag = false;
 	GoldDropInputState = std::nullopt;
 	GoldDropInvIndex = 0;
diff --git a/Source/controls/axis_direction.cpp b/Source/controls/axis_direction.cpp
index a2838ee09..fbd055be5 100644
--- a/Source/controls/axis_direction.cpp
+++ b/Source/controls/axis_direction.cpp
@@ -1,6 +1,10 @@
 #include "axis_direction.h"
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_timer.h>
+#else
 #include <SDL.h>
+#endif
 
 namespace devilution {
 
diff --git a/Source/controls/controller.cpp b/Source/controls/controller.cpp
index 51c0ff69a..12a1cd298 100644
--- a/Source/controls/controller.cpp
+++ b/Source/controls/controller.cpp
@@ -36,11 +36,17 @@ StaticVector<ControllerButtonEvent, 4> ToControllerButtonEvents(const SDL_Event
 {
 	ControllerButtonEvent result { ControllerButton_NONE, false };
 	switch (event.type) {
+#ifdef USE_SDL3
+	case SDL_EVENT_GAMEPAD_BUTTON_UP:
+	case SDL_EVENT_JOYSTICK_BUTTON_UP:
+	case SDL_EVENT_KEY_UP:
+#else
 #ifndef USE_SDL1
 	case SDL_CONTROLLERBUTTONUP:
 #endif
 	case SDL_JOYBUTTONUP:
 	case SDL_KEYUP:
+#endif
 		result.up = true;
 		break;
 	default:
diff --git a/Source/controls/devices/game_controller.h b/Source/controls/devices/game_controller.h
index 69d2761d8..955c6aedf 100644
--- a/Source/controls/devices/game_controller.h
+++ b/Source/controls/devices/game_controller.h
@@ -2,7 +2,13 @@
 
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_gamepad.h>
+#include <SDL3/SDL_joystick.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "controls/controller_buttons.h"
 #include "controls/game_controls.h"
@@ -41,7 +47,12 @@ public:
 	static GamepadLayout getLayout(const SDL_Event &event);
 
 private:
-	SDL_GameController *sdl_game_controller_ = NULL;
+#ifdef USE_SDL3
+	SDL_Gamepad *sdl_game_controller_ = nullptr;
+#else
+	SDL_GameController *sdl_game_controller_ = nullptr;
+#endif
+
 	SDL_JoystickID instance_id_ = -1;
 
 	ControllerButton trigger_left_state_ = ControllerButton_NONE;
diff --git a/Source/controls/devices/joystick.cpp b/Source/controls/devices/joystick.cpp
index 18733d58f..c238d4fa2 100644
--- a/Source/controls/devices/joystick.cpp
+++ b/Source/controls/devices/joystick.cpp
@@ -320,14 +320,22 @@ bool Joystick::IsPressed(ControllerButton button) const
 	const int joyButton = ToSdlJoyButton(button);
 	if (joyButton == -1)
 		return false;
+#ifdef USE_SDL3
+	const int numButtons = SDL_GetNumJoystickButtons(sdl_joystick_);
+	return joyButton < numButtons && SDL_GetJoystickButton(sdl_joystick_, joyButton);
+#else
 	const int numButtons = SDL_JoystickNumButtons(sdl_joystick_);
 	return joyButton < numButtons && SDL_JoystickGetButton(sdl_joystick_, joyButton) != 0;
+#endif
 }
 
 bool Joystick::ProcessAxisMotion(const SDL_Event &event)
 {
-	if (event.type != SDL_JOYAXISMOTION)
-		return false;
+#ifdef USE_SDL3
+	if (event.type != SDL_EVENT_JOYSTICK_AXIS_MOTION) return false;
+#else
+	if (event.type != SDL_JOYAXISMOTION) return false;
+#endif
 
 #if defined(JOY_AXIS_LEFTX) || defined(JOY_AXIS_LEFTY) || defined(JOY_AXIS_RIGHTX) || defined(JOY_AXIS_RIGHTY)
 	switch (event.jaxis.axis) {
diff --git a/Source/controls/input.h b/Source/controls/input.h
index 1780cdfc2..1b37ee329 100644
--- a/Source/controls/input.h
+++ b/Source/controls/input.h
@@ -1,16 +1,24 @@
 #pragma once
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "controls/controller.h"
 #include "controls/controller_motion.h"
 
 namespace devilution {
 
-inline int PollEvent(SDL_Event *event)
+inline bool PollEvent(SDL_Event *event)
 {
-	int result = SDL_PollEvent(event);
-	if (result != 0) {
+#ifdef USE_SDL3
+	const bool result = SDL_PollEvent(event);
+#else
+	const bool result = SDL_PollEvent(event) >= 0;
+#endif
+	if (result) {
 		UnlockControllerState(*event);
 		ProcessControllerMotion(*event);
 	}
diff --git a/Source/controls/keymapper.cpp b/Source/controls/keymapper.cpp
index d5bd6e5c6..8a7b344cf 100644
--- a/Source/controls/keymapper.cpp
+++ b/Source/controls/keymapper.cpp
@@ -1,10 +1,16 @@
 #include "controls/keymapper.hpp"
 
+#include <cstdint>
+
+#ifdef USE_SDL3
+#include <SDL3/SDL_keycode.h>
+#else
 #include <SDL.h>
 
 #ifdef USE_SDL1
 #include "utils/sdl2_to_1_2_backports.h"
 #endif
+#endif
 
 #include "control.h"
 #include "options.h"
@@ -15,7 +21,12 @@ namespace {
 
 bool IsTextEntryKey(SDL_Keycode vkey)
 {
-	return IsAnyOf(vkey, SDLK_ESCAPE, SDLK_RETURN, SDLK_KP_ENTER, SDLK_BACKSPACE, SDLK_DOWN, SDLK_UP) || (vkey >= SDLK_SPACE && vkey <= SDLK_z);
+	return IsAnyOf(vkey, SDLK_ESCAPE, SDLK_RETURN, SDLK_KP_ENTER, SDLK_BACKSPACE, SDLK_DOWN, SDLK_UP)
+#ifdef USE_SDL3
+	    || (vkey >= SDLK_SPACE && vkey <= SDLK_Z);
+#else
+	    || (vkey >= SDLK_SPACE && vkey <= SDLK_z);
+#endif
 }
 
 bool IsNumberEntryKey(SDL_Keycode vkey)
@@ -25,8 +36,14 @@ bool IsNumberEntryKey(SDL_Keycode vkey)
 
 SDL_Keycode ToAsciiUpper(SDL_Keycode key)
 {
-	if (key >= SDLK_a && key <= SDLK_z) {
-		return static_cast<SDL_Keycode>(static_cast<Sint32>(key) - ('a' - 'A'));
+	if (
+#ifdef USE_SDL3
+	    key >= SDLK_A && key <= SDLK_Z
+#else
+	    key >= SDLK_a && key <= SDLK_z
+#endif
+	) {
+		return static_cast<SDL_Keycode>(static_cast<int32_t>(key) - ('a' - 'A'));
 	}
 	return key;
 }
diff --git a/Source/controls/keymapper.hpp b/Source/controls/keymapper.hpp
index 048f6a4fb..63d864e80 100644
--- a/Source/controls/keymapper.hpp
+++ b/Source/controls/keymapper.hpp
@@ -2,11 +2,15 @@
 
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_keycode.h>
+#else
 #include <SDL.h>
 
 #ifdef USE_SDL1
 #include "utils/sdl2_to_1_2_backports.h"
 #endif
+#endif
 
 namespace devilution {
 
diff --git a/Source/controls/menu_controls.cpp b/Source/controls/menu_controls.cpp
index abe9351a8..40804ae92 100644
--- a/Source/controls/menu_controls.cpp
+++ b/Source/controls/menu_controls.cpp
@@ -1,5 +1,13 @@
 #include "controls/menu_controls.h"
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_keyboard.h>
+#include <SDL3/SDL_keycode.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "DiabloUI/diabloui.h"
 #include "controls/axis_direction.h"
 #include "controls/control_mode.hpp"
@@ -78,7 +86,13 @@ std::vector<MenuAction> GetMenuActions(const SDL_Event &event)
 		return menuActions;
 	}
 
-	if (event.type == SDL_MOUSEBUTTONDOWN) {
+	if (event.type ==
+#ifdef USE_SDL3
+	    SDL_EVENT_MOUSE_BUTTON_DOWN
+#else
+	    SDL_MOUSEBUTTONDOWN
+#endif
+	) {
 		switch (event.button.button) {
 		case SDL_BUTTON_X1:
 #if !SDL_VERSION_ATLEAST(2, 0, 0)
@@ -89,8 +103,20 @@ std::vector<MenuAction> GetMenuActions(const SDL_Event &event)
 	}
 
 #if HAS_KBCTRL == 0
-	if (event.type == SDL_KEYDOWN) {
-		SDL_Keycode sym = event.key.keysym.sym;
+	if (
+	    event.type ==
+#ifdef USE_SDL3
+	    SDL_EVENT_KEY_DOWN
+#else
+	    SDL_KEYDOWN
+#endif
+	) {
+		SDL_Keycode sym =
+#ifdef USE_SDL3
+		    event.key.key;
+#else
+		    event.key.keysym.sym;
+#endif
 		remap_keyboard_key(&sym);
 		switch (sym) {
 		case SDLK_UP:
@@ -98,16 +124,30 @@ std::vector<MenuAction> GetMenuActions(const SDL_Event &event)
 		case SDLK_DOWN:
 			return { MenuAction_DOWN };
 		case SDLK_TAB:
-			if ((SDL_GetModState() & KMOD_SHIFT) != 0)
+			if ((SDL_GetModState() &
+#ifdef USE_SDL3
+			        SDL_KMOD_SHIFT
+#else
+			        KMOD_SHIFT
+#endif
+			        )
+			    != 0) {
 				return { MenuAction_UP };
-			else
-				return { MenuAction_DOWN };
+			}
+			return { MenuAction_DOWN };
 		case SDLK_PAGEUP:
 			return { MenuAction_PAGE_UP };
 		case SDLK_PAGEDOWN:
 			return { MenuAction_PAGE_DOWN };
 		case SDLK_RETURN:
-			if ((SDL_GetModState() & KMOD_ALT) == 0) {
+			if ((SDL_GetModState() &
+#ifdef USE_SDL3
+			        SDL_KMOD_ALT
+#else
+			        KMOD_ALT
+#endif
+			        )
+			    == 0) {
 				return { MenuAction_SELECT };
 			}
 			break;
diff --git a/Source/controls/menu_controls.h b/Source/controls/menu_controls.h
index f5475cb26..ca95cb111 100644
--- a/Source/controls/menu_controls.h
+++ b/Source/controls/menu_controls.h
@@ -1,9 +1,14 @@
 #pragma once
 
-#include <SDL.h>
 #include <cstdint>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#else
+#include <SDL.h>
+#endif
+
 namespace devilution {
 
 enum MenuAction : uint8_t {
diff --git a/Source/controls/plrctrls.cpp b/Source/controls/plrctrls.cpp
index 00725426b..f4348eb04 100644
--- a/Source/controls/plrctrls.cpp
+++ b/Source/controls/plrctrls.cpp
@@ -5,9 +5,17 @@
 #include <cstdint>
 #include <list>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_gamepad.h>
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+
 #ifdef USE_SDL1
 #include "utils/sdl2_to_1_2_backports.h"
 #endif
+#endif
 
 #include "automap.h"
 #include "control.h"
@@ -1592,34 +1600,102 @@ bool IsStickMovementSignificant()
 
 ControlTypes GetInputTypeFromEvent(const SDL_Event &event)
 {
-	if (IsAnyOf(event.type, SDL_KEYDOWN, SDL_KEYUP))
+	switch (event.type) {
+#ifdef USE_SDL3
+	case SDL_EVENT_KEY_DOWN:
+	case SDL_EVENT_KEY_UP:
+#else
+	case SDL_KEYDOWN:
+	case SDL_KEYUP:
+#endif
 		return ControlTypes::KeyboardAndMouse;
 #ifdef USE_SDL1
-	if (IsAnyOf(event.type, SDL_MOUSEBUTTONDOWN, SDL_MOUSEBUTTONUP, SDL_MOUSEMOTION))
+	case SDL_MOUSEBUTTONDOWN:
+	case SDL_MOUSEBUTTONUP:
+	case SDL_MOUSEMOTION:
 		return ControlTypes::KeyboardAndMouse;
 #else
-	if (IsAnyOf(event.type, SDL_MOUSEBUTTONDOWN, SDL_MOUSEBUTTONUP))
+// SDL 2/3-only events (touch / gamepad):
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_BUTTON_DOWN:
+	case SDL_EVENT_MOUSE_BUTTON_UP:
+#else
+	case SDL_MOUSEBUTTONDOWN:
+	case SDL_MOUSEBUTTONUP:
+#endif
 		return event.button.which == SDL_TOUCH_MOUSEID ? ControlTypes::VirtualGamepad : ControlTypes::KeyboardAndMouse;
-	if (event.type == SDL_MOUSEMOTION)
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_MOTION:
+#else
+	case SDL_MOUSEMOTION:
+#endif
 		return event.motion.which == SDL_TOUCH_MOUSEID ? ControlTypes::VirtualGamepad : ControlTypes::KeyboardAndMouse;
-	if (event.type == SDL_MOUSEWHEEL)
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_WHEEL:
+#else
+	case SDL_MOUSEWHEEL:
+#endif
 		return event.wheel.which == SDL_TOUCH_MOUSEID ? ControlTypes::VirtualGamepad : ControlTypes::KeyboardAndMouse;
-	if (IsAnyOf(event.type, SDL_FINGERDOWN, SDL_FINGERUP, SDL_FINGERMOTION))
+#ifdef USE_SDL3
+	case SDL_EVENT_FINGER_DOWN:
+	case SDL_EVENT_FINGER_UP:
+	case SDL_EVENT_FINGER_MOTION:
+#else
+	case SDL_FINGERDOWN:
+	case SDL_FINGERUP:
+	case SDL_FINGERMOTION:
+#endif
 		return ControlTypes::VirtualGamepad;
-	if (event.type == SDL_CONTROLLERAXISMOTION
-	    && (event.caxis.axis == SDL_CONTROLLER_AXIS_TRIGGERLEFT || event.caxis.axis == SDL_CONTROLLER_AXIS_TRIGGERRIGHT
-	        || IsStickMovementSignificant()))
-		return ControlTypes::Gamepad;
-	if (event.type >= SDL_CONTROLLERBUTTONDOWN && event.type <= SDL_CONTROLLERDEVICEREMAPPED)
-		return ControlTypes::Gamepad;
-	if (IsAnyOf(event.type, SDL_JOYDEVICEADDED, SDL_JOYDEVICEREMOVED))
-		return ControlTypes::Gamepad;
+#ifdef USE_SDL3
+	case SDL_EVENT_GAMEPAD_AXIS_MOTION:
+#else
+	case SDL_CONTROLLERAXISMOTION:
+#endif
+		if (
+#ifdef USE_SDL3
+		    IsAnyOf(event.gaxis.axis, SDL_GAMEPAD_AXIS_LEFT_TRIGGER, SDL_GAMEPAD_AXIS_RIGHT_TRIGGER)
+#else
+		    IsAnyOf(event.caxis.axis, SDL_CONTROLLER_AXIS_TRIGGERLEFT, SDL_CONTROLLER_AXIS_TRIGGERRIGHT)
+#endif
+		    || IsStickMovementSignificant()) {
+			return ControlTypes::Gamepad;
+		}
+		break;
+#endif // !USE_SDL1
+#ifdef USE_SDL3
+	case SDL_EVENT_GAMEPAD_BUTTON_DOWN:
+	case SDL_EVENT_GAMEPAD_BUTTON_UP:
+	case SDL_EVENT_GAMEPAD_ADDED:
+	case SDL_EVENT_JOYSTICK_BALL_MOTION:
+	case SDL_EVENT_JOYSTICK_HAT_MOTION:
+	case SDL_EVENT_JOYSTICK_BUTTON_DOWN:
+	case SDL_EVENT_JOYSTICK_BUTTON_UP:
+#else
+#ifndef USE_SDL1
+	case SDL_CONTROLLERBUTTONDOWN:
+	case SDL_CONTROLLERBUTTONUP:
+	case SDL_CONTROLLERDEVICEADDED:
+#endif
+	case SDL_JOYBALLMOTION:
+	case SDL_JOYHATMOTION:
+	case SDL_JOYBUTTONDOWN:
+	case SDL_JOYBUTTONUP:
 #endif
-	if (event.type == SDL_JOYAXISMOTION && IsStickMovementSignificant())
-		return ControlTypes::Gamepad;
-	if (event.type >= SDL_JOYBALLMOTION && event.type <= SDL_JOYBUTTONUP)
 		return ControlTypes::Gamepad;
-
+#ifdef USE_SDL3
+	case SDL_EVENT_JOYSTICK_AXIS_MOTION:
+	case SDL_EVENT_JOYSTICK_ADDED:
+#else
+	case SDL_JOYAXISMOTION:
+#ifndef USE_SDL1
+	case SDL_JOYDEVICEADDED:
+#endif
+#endif
+		if (IsStickMovementSignificant()) return ControlTypes::Gamepad;
+		break;
+	default:
+		break;
+	}
 	return ControlTypes::None;
 }
 
@@ -1631,9 +1707,16 @@ bool ContinueSimulatedMouseEvent(const SDL_Event &event, const ControllerButtonE
 		return false;
 
 #if !defined(USE_SDL1) && !defined(JOY_AXIS_RIGHTX) && !defined(JOY_AXIS_RIGHTY)
-	if (IsAnyOf(event.type, SDL_JOYAXISMOTION, SDL_JOYHATMOTION, SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP)) {
-		if (!GameController::All().empty())
-			return true;
+	if (IsAnyOf(event.type,
+#ifdef USE_SDL3
+	        SDL_EVENT_JOYSTICK_AXIS_MOTION, SDL_EVENT_JOYSTICK_HAT_MOTION,
+	        SDL_EVENT_JOYSTICK_BUTTON_DOWN, SDL_EVENT_JOYSTICK_BUTTON_UP
+#else
+	        SDL_JOYAXISMOTION, SDL_JOYHATMOTION, SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP
+#endif
+	        )
+	    && !GameController::All().empty()) {
+		return true;
 	}
 #endif
 
@@ -1662,8 +1745,7 @@ std::string_view ControlTypeToString(ControlTypes controlType)
 
 void LogControlDeviceAndModeChange(ControlTypes newControlDevice, ControlTypes newControlMode)
 {
-	if (SDL_LogGetPriority(SDL_LOG_CATEGORY_APPLICATION) > SDL_LOG_PRIORITY_VERBOSE)
-		return;
+	if (!IsLogLevel(LogCategory::Application, SDL_LOG_PRIORITY_VERBOSE)) return;
 	if (newControlDevice == ControlDevice && newControlMode == ControlMode)
 		return;
 	constexpr auto DebugChange = [](ControlTypes before, ControlTypes after) -> std::string {
@@ -1692,8 +1774,7 @@ std::string_view GamepadTypeToString(GamepadLayout gamepadLayout)
 
 void LogGamepadChange(GamepadLayout newGamepad)
 {
-	if (SDL_LogGetPriority(SDL_LOG_CATEGORY_APPLICATION) > SDL_LOG_PRIORITY_VERBOSE)
-		return;
+	if (!IsLogLevel(LogCategory::Application, SDL_LOG_PRIORITY_VERBOSE)) return;
 	constexpr auto DebugChange = [](GamepadLayout before, GamepadLayout after) -> std::string {
 		if (before == after)
 			return std::string { GamepadTypeToString(before) };
diff --git a/Source/controls/plrctrls.h b/Source/controls/plrctrls.h
index c02689c44..4b79c8fde 100644
--- a/Source/controls/plrctrls.h
+++ b/Source/controls/plrctrls.h
@@ -4,7 +4,11 @@
 #include <cstddef>
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "controls/controller.h"
 #include "controls/game_controls.h"
diff --git a/Source/controls/remap_keyboard.h b/Source/controls/remap_keyboard.h
index f569a16bf..697e610ef 100644
--- a/Source/controls/remap_keyboard.h
+++ b/Source/controls/remap_keyboard.h
@@ -2,11 +2,14 @@
 
 #include <cstddef>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_keycode.h>
+#else
 #include <SDL.h>
-
 #ifdef USE_SDL1
 #include "utils/sdl2_to_1_2_backports.h"
 #endif
+#endif
 
 namespace devilution {
 
diff --git a/Source/controls/touch/event_handlers.cpp b/Source/controls/touch/event_handlers.cpp
index 9cad136c5..ea0ae2b3e 100644
--- a/Source/controls/touch/event_handlers.cpp
+++ b/Source/controls/touch/event_handlers.cpp
@@ -1,5 +1,12 @@
 #include "controls/touch/event_handlers.h"
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_version.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "control.h"
 #include "controls/plrctrls.h"
 #include "cursor.h"
@@ -36,6 +43,42 @@ Point ScaleToScreenCoordinates(float x, float y)
 	};
 }
 
+constexpr bool IsFingerDown(const SDL_Event &event)
+{
+#ifdef USE_SDL3
+	return event.type == SDL_EVENT_FINGER_DOWN;
+#else
+	return event.type == SDL_FINGERDOWN;
+#endif
+}
+
+constexpr bool IsFingerUp(const SDL_Event &event)
+{
+#ifdef USE_SDL3
+	return event.type == SDL_EVENT_FINGER_UP;
+#else
+	return event.type == SDL_FINGERUP;
+#endif
+}
+
+constexpr bool IsFingerMotion(const SDL_Event &event)
+{
+#ifdef USE_SDL3
+	return event.type == SDL_EVENT_FINGER_MOTION;
+#else
+	return event.type == SDL_FINGERMOTION;
+#endif
+}
+
+constexpr SDL_FingerID FingerId(const SDL_TouchFingerEvent &event)
+{
+#ifdef USE_SDL3
+	return event.fingerID;
+#else
+	return event.fingerId;
+#endif
+}
+
 void SimulateMouseMovement(const SDL_Event &event)
 {
 	const Point position = ScaleToScreenCoordinates(event.tfinger.x, event.tfinger.y);
@@ -62,18 +105,18 @@ bool HandleGameMenuInteraction(const SDL_Event &event)
 {
 	if (!gmenu_is_active())
 		return false;
-	if (event.type == SDL_FINGERDOWN && gmenu_left_mouse(true))
+	if (IsFingerDown(event) && gmenu_left_mouse(true))
 		return true;
-	if (event.type == SDL_FINGERMOTION && gmenu_on_mouse_move())
+	if (IsFingerMotion(event) && gmenu_on_mouse_move())
 		return true;
-	return event.type == SDL_FINGERUP && gmenu_left_mouse(false);
+	return IsFingerUp(event) && gmenu_left_mouse(false);
 }
 
 bool HandleStoreInteraction(const SDL_Event &event)
 {
 	if (!IsPlayerInStore())
 		return false;
-	if (event.type == SDL_FINGERDOWN)
+	if (IsFingerDown(event))
 		CheckStoreBtn();
 	return true;
 }
@@ -83,7 +126,7 @@ void HandleSpellBookInteraction(const SDL_Event &event)
 	if (!SpellbookFlag)
 		return;
 
-	if (event.type == SDL_FINGERUP)
+	if (IsFingerUp(event))
 		CheckSBook();
 }
 
@@ -91,7 +134,7 @@ bool HandleSpeedBookInteraction(const SDL_Event &event)
 {
 	if (!SpellSelectFlag)
 		return false;
-	if (event.type == SDL_FINGERUP)
+	if (IsFingerUp(event))
 		SetSpell();
 	return true;
 }
@@ -103,7 +146,7 @@ void HandleBottomPanelInteraction(const SDL_Event &event)
 
 	ResetMainPanelButtons();
 
-	if (event.type != SDL_FINGERUP) {
+	if (!IsFingerUp(event)) {
 		SpellSelectFlag = true;
 		CheckMainPanelButton();
 		SpellSelectFlag = false;
@@ -119,9 +162,9 @@ void HandleCharacterPanelInteraction(const SDL_Event &event)
 	if (!CharFlag)
 		return;
 
-	if (event.type == SDL_FINGERDOWN)
+	if (IsFingerDown(event))
 		CheckChrBtns();
-	else if (event.type == SDL_FINGERUP && CharPanelButtonActive)
+	else if (IsFingerUp(event) && CharPanelButtonActive)
 		ReleaseChrBtns(false);
 }
 
@@ -130,7 +173,7 @@ void HandleStashPanelInteraction(const SDL_Event &event)
 	if (!IsStashOpen || !MyPlayer->HoldItem.isEmpty())
 		return;
 
-	if (event.type != SDL_FINGERUP) {
+	if (!IsFingerUp(event)) {
 		CheckStashButtonPress(MousePosition);
 	} else {
 		CheckStashButtonRelease(MousePosition);
@@ -158,7 +201,7 @@ void HandleTouchEvent(const SDL_Event &event)
 		return;
 	}
 
-	if (!IsAnyOf(event.type, SDL_FINGERDOWN, SDL_FINGERUP, SDL_FINGERMOTION)) {
+	if (!IsFingerDown(event) && !IsFingerUp(event) && !IsFingerMotion(event)) {
 		return;
 	}
 
@@ -189,7 +232,7 @@ void DeactivateTouchEventHandlers()
 bool VirtualGamepadEventHandler::Handle(const SDL_Event &event)
 {
 	if (!IsDeactivateEvent(event)) {
-		if (!VirtualGamepadState.isActive || !IsAnyOf(event.type, SDL_FINGERDOWN, SDL_FINGERUP, SDL_FINGERMOTION)) {
+		if (!VirtualGamepadState.isActive || (!IsFingerDown(event) && !IsFingerUp(event) && !IsFingerMotion(event))) {
 			VirtualGamepadState.primaryActionButton.didStateChange = false;
 			VirtualGamepadState.secondaryActionButton.didStateChange = false;
 			VirtualGamepadState.spellActionButton.didStateChange = false;
@@ -244,19 +287,10 @@ bool VirtualDirectionPadEventHandler::Handle(const SDL_Event &event)
 		return false;
 	}
 
-	switch (event.type) {
-	case SDL_FINGERDOWN:
-		return HandleFingerDown(event.tfinger);
-
-	case SDL_FINGERUP:
-		return HandleFingerUp(event.tfinger);
-
-	case SDL_FINGERMOTION:
-		return HandleFingerMotion(event.tfinger);
-
-	default:
-		return false;
-	}
+	if (IsFingerDown(event)) return HandleFingerDown(event.tfinger);
+	if (IsFingerUp(event)) return HandleFingerUp(event.tfinger);
+	if (IsFingerMotion(event)) return HandleFingerMotion(event.tfinger);
+	return false;
 }
 
 bool VirtualDirectionPadEventHandler::HandleFingerDown(const SDL_TouchFingerEvent &event)
@@ -272,14 +306,14 @@ bool VirtualDirectionPadEventHandler::HandleFingerDown(const SDL_TouchFingerEven
 		return false;
 
 	virtualDirectionPad->UpdatePosition(touchCoordinates);
-	activeFinger = event.fingerId;
+	activeFinger = FingerId(event);
 	isActive = true;
 	return true;
 }
 
 bool VirtualDirectionPadEventHandler::HandleFingerUp(const SDL_TouchFingerEvent &event)
 {
-	if (!isActive || event.fingerId != activeFinger)
+	if (!isActive || FingerId(event) != activeFinger)
 		return false;
 
 	const Point position = virtualDirectionPad->area.position;
@@ -290,7 +324,7 @@ bool VirtualDirectionPadEventHandler::HandleFingerUp(const SDL_TouchFingerEvent
 
 bool VirtualDirectionPadEventHandler::HandleFingerMotion(const SDL_TouchFingerEvent &event)
 {
-	if (!isActive || event.fingerId != activeFinger)
+	if (!isActive || FingerId(event) != activeFinger)
 		return false;
 
 	const float x = event.x;
@@ -316,19 +350,10 @@ bool VirtualButtonEventHandler::Handle(const SDL_Event &event)
 
 	virtualButton->didStateChange = false;
 
-	switch (event.type) {
-	case SDL_FINGERDOWN:
-		return HandleFingerDown(event.tfinger);
-
-	case SDL_FINGERUP:
-		return HandleFingerUp(event.tfinger);
-
-	case SDL_FINGERMOTION:
-		return HandleFingerMotion(event.tfinger);
-
-	default:
-		return false;
-	}
+	if (IsFingerDown(event)) return HandleFingerDown(event.tfinger);
+	if (IsFingerUp(event)) return HandleFingerUp(event.tfinger);
+	if (IsFingerMotion(event)) return HandleFingerMotion(event.tfinger);
+	return false;
 }
 
 bool VirtualButtonEventHandler::HandleFingerDown(const SDL_TouchFingerEvent &event)
@@ -349,14 +374,14 @@ bool VirtualButtonEventHandler::HandleFingerDown(const SDL_TouchFingerEvent &eve
 		virtualButton->isHeld = true;
 
 	virtualButton->didStateChange = true;
-	activeFinger = event.fingerId;
+	activeFinger = FingerId(event);
 	isActive = true;
 	return true;
 }
 
 bool VirtualButtonEventHandler::HandleFingerUp(const SDL_TouchFingerEvent &event)
 {
-	if (!isActive || event.fingerId != activeFinger)
+	if (!isActive || FingerId(event) != activeFinger)
 		return false;
 
 	if (!toggles) {
@@ -371,7 +396,7 @@ bool VirtualButtonEventHandler::HandleFingerUp(const SDL_TouchFingerEvent &event
 
 bool VirtualButtonEventHandler::HandleFingerMotion(const SDL_TouchFingerEvent &event)
 {
-	if (!isActive || event.fingerId != activeFinger)
+	if (!isActive || FingerId(event) != activeFinger)
 		return false;
 
 	if (toggles)
diff --git a/Source/controls/touch/event_handlers.h b/Source/controls/touch/event_handlers.h
index 5e9e8b073..20de5dbe6 100644
--- a/Source/controls/touch/event_handlers.h
+++ b/Source/controls/touch/event_handlers.h
@@ -1,6 +1,10 @@
 #pragma once
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "controls/touch/gamepad.h"
 
diff --git a/Source/controls/touch/renderers.cpp b/Source/controls/touch/renderers.cpp
index 0b851b893..3c766068e 100644
--- a/Source/controls/touch/renderers.cpp
+++ b/Source/controls/touch/renderers.cpp
@@ -1,5 +1,11 @@
 #include "controls/touch/renderers.h"
 
+#ifdef USE_SDL
+#include <SDL3/SDL_surface.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "control.h"
 #include "cursor.h"
 #include "diablo.h"
@@ -127,14 +133,19 @@ void LoadPotionArt(ButtonTexture *potionArt)
 	    SDL_PIXELFORMAT_INDEX8);
 
 	auto palette = SDLWrap::AllocPalette();
-	if (SDLC_SetSurfaceAndPaletteColors(surface.get(), palette.get(), logical_palette.data(), 0, 256) < 0)
+	if (!SDLC_SetSurfaceAndPaletteColors(surface.get(), palette.get(), logical_palette.data(), 0, 256))
 		ErrSdl();
 
 	const Uint32 bgColor = SDL_MapRGB(surface->format, logical_palette[1].r, logical_palette[1].g, logical_palette[1].b);
+#ifdef USE_SDL3
+	if (!SDL_FillSurfaceRect(surface.get(), nullptr, bgColor)) ErrSdl();
+	if (!SDL_SetSurfaceColorKey(surface.get(), true, bgColor)) ErrSdl();
+#else
 	if (SDL_FillRect(surface.get(), nullptr, bgColor) < 0)
 		ErrSdl();
 	if (SDL_SetColorKey(surface.get(), SDL_TRUE, bgColor) < 0)
 		ErrSdl();
+#endif
 
 	Point position { 0, 0 };
 	for (const item_cursor_graphic graphic : potionGraphics) {
@@ -145,7 +156,13 @@ void LoadPotionArt(ButtonTexture *potionArt)
 
 	potionArt->numFrames = sizeof(potionGraphics);
 
-	potionArt->surface.reset(SDL_ConvertSurfaceFormat(surface.get(), SDL_PIXELFORMAT_ARGB8888, 0));
+	potionArt->surface.reset(
+#ifdef USE_SDL3
+	    SDL_ConvertSurface(surface.get(), SDL_PIXELFORMAT_ARGB8888)
+#else
+	    SDL_ConvertSurfaceFormat(surface.get(), SDL_PIXELFORMAT_ARGB8888, 0)
+#endif
+	);
 }
 
 bool InteractsWithCharButton(Point point)
@@ -191,8 +208,11 @@ void RenderVirtualGamepad(SDL_Renderer *renderer)
 		if (art.texture == nullptr)
 			return;
 
-		if (SDL_RenderCopy(renderer, art.texture.get(), src, dst) <= -1)
-			ErrSdl();
+#ifdef USE_SDL3
+		if (!SDL_RenderTexture(renderer, art.texture.get(), src, dst)) ErrSdl();
+#else
+		if (SDL_RenderCopy(renderer, art.texture.get(), src, dst) <= -1) ErrSdl();
+#endif
 	};
 
 	Renderer.Render(renderFunction);
diff --git a/Source/controls/touch/renderers.h b/Source/controls/touch/renderers.h
index 7ceab432f..1d62b3208 100644
--- a/Source/controls/touch/renderers.h
+++ b/Source/controls/touch/renderers.h
@@ -3,7 +3,11 @@
 #include <cstdint>
 #include <optional>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_render.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "controls/plrctrls.h"
 #include "controls/touch/gamepad.h"
diff --git a/Source/cursor.cpp b/Source/cursor.cpp
index 56af0c9c5..0d5567619 100644
--- a/Source/cursor.cpp
+++ b/Source/cursor.cpp
@@ -11,6 +11,13 @@
 #include <string_view>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#else
+#include <SDL.h>
+#endif
+
 #include <fmt/format.h>
 
 #include "DiabloUI/diabloui.h"
@@ -501,17 +508,31 @@ void CreateHalfSizeItemSprites()
 		}
 		const Surface itemSurface = ownedItemSurface.subregion(0, 0, itemSprite.width(), itemSprite.height());
 		const SDL_Rect itemSurfaceRect = MakeSdlRect(0, 0, itemSurface.w(), itemSurface.h());
+
+#ifdef USE_SDL3
+		SDL_SetSurfaceClipRect(itemSurface.surface, &itemSurfaceRect);
+		SDL_FillSurfaceRect(itemSurface.surface, nullptr, 1);
+#else
 		SDL_SetClipRect(itemSurface.surface, &itemSurfaceRect);
 		SDL_FillRect(itemSurface.surface, nullptr, 1);
+#endif
 		ClxDraw(itemSurface, { 0, itemSurface.h() }, itemSprite);
 
 		const Surface halfSurface = ownedHalfSurface.subregion(0, 0, itemSurface.w() / 2, itemSurface.h() / 2);
 		const SDL_Rect halfSurfaceRect = MakeSdlRect(0, 0, halfSurface.w(), halfSurface.h());
+#ifdef USE_SDL3
+		SDL_SetSurfaceClipRect(halfSurface.surface, &halfSurfaceRect);
+#else
 		SDL_SetClipRect(halfSurface.surface, &halfSurfaceRect);
+#endif
 		BilinearDownscaleByHalf8(itemSurface.surface, paletteTransparencyLookup, halfSurface.surface, 1);
 		HalfSizeItemSprites[outputIndex].emplace(SurfaceToClx(halfSurface, 1, 1));
 
+#ifdef USE_SDL3
+		SDL_FillSurfaceRect(itemSurface.surface, nullptr, 1);
+#else
 		SDL_FillRect(itemSurface.surface, nullptr, 1);
+#endif
 		ClxDrawTRN(itemSurface, { 0, itemSurface.h() }, itemSprite, redTrn);
 		BilinearDownscaleByHalf8(itemSurface.surface, paletteTransparencyLookup, halfSurface.surface, 1);
 		HalfSizeItemSpritesRed[outputIndex].emplace(SurfaceToClx(halfSurface, 1, 1));
diff --git a/Source/diablo_msg.cpp b/Source/diablo_msg.cpp
index 68f768f42..3137712e1 100644
--- a/Source/diablo_msg.cpp
+++ b/Source/diablo_msg.cpp
@@ -8,6 +8,12 @@
 #include <cstdint>
 #include <deque>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "diablo_msg.hpp"
 
 #include "DiabloUI/ui_flags.hpp"
diff --git a/Source/engine/demomode.cpp b/Source/engine/demomode.cpp
index 1d1d60367..ad4abedc7 100644
--- a/Source/engine/demomode.cpp
+++ b/Source/engine/demomode.cpp
@@ -5,9 +5,17 @@
 #include <limits>
 #include <optional>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_keyboard.h>
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+
 #ifdef USE_SDL1
 #include "utils/sdl2_to_1_2_backports.h"
 #endif
+#endif
 
 #include "controls/control_mode.hpp"
 #include "controls/plrctrls.h"
@@ -247,23 +255,44 @@ bool CreateSdlEvent(const DemoMsg &dmsg, SDL_Event &event, uint16_t &modState)
 	const uint8_t type = dmsg.type;
 	switch (type) {
 	case DemoMsg::MouseMotionEvent:
+#ifdef USE_SDL3
+		event.type = SDL_EVENT_MOUSE_MOTION;
+		event.motion.state = 0;
+		event.motion.xrel = 0.F;
+		event.motion.yrel = 0.F;
+#else
 		event.type = SDL_MOUSEMOTION;
+#endif
 		event.motion.which = 0;
 		event.motion.x = dmsg.motion.x;
 		event.motion.y = dmsg.motion.y;
 		return true;
 	case DemoMsg::MouseButtonDownEvent:
 	case DemoMsg::MouseButtonUpEvent:
+#ifdef USE_SDL3
+		event.type = type == DemoMsg::MouseButtonDownEvent ? SDL_EVENT_MOUSE_BUTTON_DOWN : SDL_EVENT_MOUSE_BUTTON_UP;
+		event.button.down = type == DemoMsg::MouseButtonDownEvent;
+		event.button.clicks = 1;
+#else
 		event.type = type == DemoMsg::MouseButtonDownEvent ? SDL_MOUSEBUTTONDOWN : SDL_MOUSEBUTTONUP;
+		event.button.state = type == DemoMsg::MouseButtonDownEvent ? SDL_PRESSED : SDL_RELEASED;
+#endif
 		event.button.which = 0;
 		event.button.button = dmsg.button.button;
-		event.button.state = type == DemoMsg::MouseButtonDownEvent ? SDL_PRESSED : SDL_RELEASED;
 		event.button.x = dmsg.button.x;
 		event.button.y = dmsg.button.y;
 		modState = dmsg.button.mod;
 		return true;
 	case DemoMsg::MouseWheelEvent:
+#ifdef USE_SDL3
+		event.type = SDL_EVENT_MOUSE_WHEEL;
+		event.wheel.integer_x = dmsg.wheel.x;
+		event.wheel.integer_y = dmsg.wheel.y;
+		event.wheel.mouse_x = 0;
+		event.wheel.mouse_y = 0;
+#else
 		event.type = SDL_MOUSEWHEEL;
+#endif
 		event.wheel.which = 0;
 		event.wheel.x = dmsg.wheel.x;
 		event.wheel.y = dmsg.wheel.y;
@@ -271,11 +300,19 @@ bool CreateSdlEvent(const DemoMsg &dmsg, SDL_Event &event, uint16_t &modState)
 		return true;
 	case DemoMsg::KeyDownEvent:
 	case DemoMsg::KeyUpEvent:
+#ifdef USE_SDL3
+		event.type = type == DemoMsg::KeyDownEvent ? SDL_EVENT_KEY_DOWN : SDL_EVENT_KEY_UP;
+		event.key.down = type == DemoMsg::KeyDownEvent;
+		event.key.scancode = SDL_GetScancodeFromKey(dmsg.key.sym, nullptr);
+		event.key.key = dmsg.key.sym;
+		event.key.mod = dmsg.key.mod;
+#else
 		event.type = type == DemoMsg::KeyDownEvent ? SDL_KEYDOWN : SDL_KEYUP;
 		event.key.state = type == DemoMsg::KeyDownEvent ? SDL_PRESSED : SDL_RELEASED;
 		event.key.keysym.scancode = SDL_GetScancodeFromKey(dmsg.key.sym);
 		event.key.keysym.sym = dmsg.key.sym;
 		event.key.keysym.mod = dmsg.key.mod;
+#endif
 		return true;
 	default:
 		if (type >= DemoMsg::MinCustomEvent) {
@@ -688,27 +725,51 @@ bool FetchMessage(SDL_Event *event, uint16_t *modState)
 		return false;
 
 	SDL_Event e;
-	if (SDL_PollEvent(&e) != 0) {
-		if (e.type == SDL_QUIT) {
+	if (
+#ifdef USE_SDL3
+	    SDL_PollEvent(&e)
+#else
+	    SDL_PollEvent(&e) != 0
+#endif
+	) {
+		if (e.type ==
+#ifdef USE_SDL3
+		    SDL_EVENT_QUIT
+#else
+		    SDL_QUIT
+#endif
+		) {
 			*event = e;
 			return true;
 		}
-		if (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_ESCAPE) {
-			CloseDemoFile();
-			CurrentDemoMessage = std::nullopt;
-			DemoNumber = -1;
-			Timedemo = false;
-			last_tick = SDL_GetTicks();
-		}
-		if (e.type == SDL_KEYDOWN && IsAnyOf(e.key.keysym.sym, SDLK_KP_PLUS, SDLK_PLUS) && sgGameInitInfo.nTickRate < 255) {
-			sgGameInitInfo.nTickRate++;
-			GetOptions().Gameplay.tickRate.SetValue(sgGameInitInfo.nTickRate);
-			gnTickDelay = 1000 / sgGameInitInfo.nTickRate;
-		}
-		if (e.type == SDL_KEYDOWN && IsAnyOf(e.key.keysym.sym, SDLK_KP_MINUS, SDLK_MINUS) && sgGameInitInfo.nTickRate > 1) {
-			sgGameInitInfo.nTickRate--;
-			GetOptions().Gameplay.tickRate.SetValue(sgGameInitInfo.nTickRate);
-			gnTickDelay = 1000 / sgGameInitInfo.nTickRate;
+		if (e.type ==
+#ifdef USE_SDL3
+		    SDL_EVENT_KEY_DOWN
+#else
+		    SDL_KEYDOWN
+#endif
+		) {
+			const SDL_Keycode key =
+#ifdef USE_SDL3
+			    e.key.key;
+#else
+			    e.key.keysym.sym;
+#endif
+			if (key == SDLK_ESCAPE) {
+				CloseDemoFile();
+				CurrentDemoMessage = std::nullopt;
+				DemoNumber = -1;
+				Timedemo = false;
+				last_tick = SDL_GetTicks();
+			} else if (IsAnyOf(key, SDLK_KP_PLUS, SDLK_PLUS) && sgGameInitInfo.nTickRate < 255) {
+				sgGameInitInfo.nTickRate++;
+				GetOptions().Gameplay.tickRate.SetValue(sgGameInitInfo.nTickRate);
+				gnTickDelay = 1000 / sgGameInitInfo.nTickRate;
+			} else if (IsAnyOf(key, SDLK_KP_MINUS, SDLK_MINUS) && sgGameInitInfo.nTickRate > 1) {
+				sgGameInitInfo.nTickRate--;
+				GetOptions().Gameplay.tickRate.SetValue(sgGameInitInfo.nTickRate);
+				gnTickDelay = 1000 / sgGameInitInfo.nTickRate;
+			}
 		}
 	}
 
@@ -743,13 +804,22 @@ void RecordMessage(const SDL_Event &event, uint16_t modState)
 	if (CurrentEventHandler == DisableInputEventHandler)
 		return;
 	switch (event.type) {
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_MOTION:
+#else
 	case SDL_MOUSEMOTION:
+#endif
 		WriteDemoMsgHeader(DemoMsg::MouseMotionEvent);
 		WriteLE16(DemoRecording, event.motion.x);
 		WriteLE16(DemoRecording, event.motion.y);
 		break;
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_BUTTON_DOWN:
+	case SDL_EVENT_MOUSE_BUTTON_UP:
+#else
 	case SDL_MOUSEBUTTONDOWN:
 	case SDL_MOUSEBUTTONUP:
+#endif
 #ifdef USE_SDL1
 		if (event.button.button == SDL_BUTTON_WHEELUP || event.button.button == SDL_BUTTON_WHEELDOWN) {
 			WriteDemoMsgHeader(DemoMsg::MouseWheelEvent);
@@ -758,7 +828,14 @@ void RecordMessage(const SDL_Event &event, uint16_t modState)
 			WriteLE16(DemoRecording, modState);
 		} else {
 #endif
-			WriteDemoMsgHeader(event.type == SDL_MOUSEBUTTONDOWN ? DemoMsg::MouseButtonDownEvent : DemoMsg::MouseButtonUpEvent);
+			WriteDemoMsgHeader(
+#ifdef USE_SDL3
+			    event.button.down
+#else
+		    event.type == SDL_MOUSEBUTTONDOWN
+#endif
+			        ? DemoMsg::MouseButtonDownEvent
+			        : DemoMsg::MouseButtonUpEvent);
 			WriteByte(DemoRecording, event.button.button);
 			WriteLE16(DemoRecording, event.button.x);
 			WriteLE16(DemoRecording, event.button.y);
@@ -768,8 +845,24 @@ void RecordMessage(const SDL_Event &event, uint16_t modState)
 #endif
 		break;
 #ifndef USE_SDL1
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_WHEEL:
+#else
 	case SDL_MOUSEWHEEL:
+#endif
 		WriteDemoMsgHeader(DemoMsg::MouseWheelEvent);
+
+#ifdef USE_SDL3
+		if (event.wheel.integer_x < std::numeric_limits<int16_t>::min()
+		    || event.wheel.integer_x > std::numeric_limits<int16_t>::max()
+		    || event.wheel.integer_y < std::numeric_limits<int16_t>::min()
+		    || event.wheel.integer_y > std::numeric_limits<int16_t>::max()) {
+			app_fatal(StrCat("Mouse wheel event integer_x/y out of int16_t range. x=",
+			    event.wheel.integer_x, " y=", event.wheel.integer_y));
+		}
+		WriteLE16(DemoRecording, event.wheel.integer_x);
+		WriteLE16(DemoRecording, event.wheel.integer_y);
+#else
 		if (event.wheel.x < std::numeric_limits<int16_t>::min()
 		    || event.wheel.x > std::numeric_limits<int16_t>::max()
 		    || event.wheel.y < std::numeric_limits<int16_t>::min()
@@ -779,23 +872,39 @@ void RecordMessage(const SDL_Event &event, uint16_t modState)
 		}
 		WriteLE16(DemoRecording, event.wheel.x);
 		WriteLE16(DemoRecording, event.wheel.y);
+#endif
 		WriteLE16(DemoRecording, modState);
 		break;
 #endif
+#ifdef USE_SDL3
+	case SDL_EVENT_KEY_DOWN:
+	case SDL_EVENT_KEY_UP:
+		WriteDemoMsgHeader(event.key.down ? DemoMsg::KeyDownEvent : DemoMsg::KeyUpEvent);
+		WriteLE32(DemoRecording, static_cast<uint32_t>(event.key.key));
+		WriteLE16(DemoRecording, static_cast<uint16_t>(event.key.mod));
+		break;
+#else
 	case SDL_KEYDOWN:
 	case SDL_KEYUP:
 		WriteDemoMsgHeader(event.type == SDL_KEYDOWN ? DemoMsg::KeyDownEvent : DemoMsg::KeyUpEvent);
 		WriteLE32(DemoRecording, static_cast<uint32_t>(event.key.keysym.sym));
 		WriteLE16(DemoRecording, static_cast<uint16_t>(event.key.keysym.mod));
 		break;
+#endif
 #ifndef USE_SDL1
+#ifndef USE_SDL3
 	case SDL_WINDOWEVENT:
 		if (event.window.type == SDL_WINDOWEVENT_CLOSE) {
 			WriteDemoMsgHeader(DemoMsg::QuitEvent);
 		}
 		break;
 #endif
+#endif
+#ifdef USE_SDL3
+	case SDL_EVENT_QUIT:
+#else
 	case SDL_QUIT:
+#endif
 		WriteDemoMsgHeader(DemoMsg::QuitEvent);
 		break;
 	default:
@@ -843,17 +952,17 @@ void NotifyGameLoopEnd()
 
 	if (IsRunning() && !HeadlessMode) {
 		const float seconds = (SDL_GetTicks() - StartTime) / 1000.0F;
-		SDL_Log("%d frames, %.2f seconds: %.1f fps", LogicTick, seconds, LogicTick / seconds);
+		Log("{} frames, {:.2f} seconds: {:.1f} fps", LogicTick, seconds, LogicTick / seconds);
 		gbRunGameResult = false;
 		gbRunGame = false;
 
 		HeroCompareResult compareResult = pfile_compare_hero_demo(DemoNumber, false);
 		switch (compareResult.status) {
 		case HeroCompareResult::ReferenceNotFound:
-			SDL_Log("Timedemo: No final comparison because reference is not present.");
+			Log("Timedemo: No final comparison because reference is not present.");
 			break;
 		case HeroCompareResult::Same:
-			SDL_Log("Timedemo: Same outcome as initial run. :)");
+			Log("Timedemo: Same outcome as initial run. :)");
 			break;
 		case HeroCompareResult::Difference:
 			Log("Timedemo: Different outcome than initial run. ;(\n{}", compareResult.message);
diff --git a/Source/engine/demomode.h b/Source/engine/demomode.h
index 59629c9d1..9f9d38ec7 100644
--- a/Source/engine/demomode.h
+++ b/Source/engine/demomode.h
@@ -7,7 +7,11 @@
 
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#else
 #include <SDL.h>
+#endif
 
 namespace devilution {
 
diff --git a/Source/engine/dx.cpp b/Source/engine/dx.cpp
index 7781d35b2..5fc1357d1 100644
--- a/Source/engine/dx.cpp
+++ b/Source/engine/dx.cpp
@@ -5,9 +5,17 @@
  */
 #include "engine/dx.h"
 
-#include <SDL.h>
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_render.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_video.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "controls/control_mode.hpp"
 #include "controls/plrctrls.h"
 #include "engine/render/primitive_render.hpp"
@@ -144,7 +152,9 @@ void CreateBackBuffer()
 		PalSurface = PinnedPalSurface.get();
 	}
 
-#ifndef USE_SDL1
+#if defined(USE_SDL3)
+	if (!SDL_SetSurfacePalette(PalSurface, Palette.get())) ErrSdl();
+#elif !defined(USE_SDL1)
 	// In SDL2, `PalSurface` points to the global `palette`.
 	if (SDL_SetSurfacePalette(PalSurface, Palette.get()) < 0)
 		ErrSdl();
@@ -168,7 +178,9 @@ void Blit(SDL_Surface *src, SDL_Rect *srcRect, SDL_Rect *dstRect)
 		return;
 
 	SDL_Surface *dst = GetOutputSurface();
-#ifndef USE_SDL1
+#if defined(USE_SDL3)
+	if (!SDL_BlitSurface(src, srcRect, dst, dstRect)) ErrSdl();
+#elif !defined(USE_SDL1)
 	if (SDL_BlitSurface(src, srcRect, dst, dstRect) < 0)
 		ErrSdl();
 #else
@@ -229,21 +241,32 @@ void RenderPresent()
 
 #ifndef USE_SDL1
 	if (renderer != nullptr) {
-		if (SDL_UpdateTexture(texture.get(), nullptr, surface->pixels, surface->pitch) <= -1) { // pitch is 2560
-			ErrSdl();
-		}
+#ifdef USE_SDL3
+		if (!SDL_UpdateTexture(texture.get(), nullptr, surface->pixels, surface->pitch)) ErrSdl();
+#else
+		if (SDL_UpdateTexture(texture.get(), nullptr, surface->pixels, surface->pitch) <= -1) ErrSdl();
+#endif
 
-		// Clear buffer to avoid artifacts in case the window was resized
-		if (SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255) <= -1) { // TODO only do this if window was resized
-			ErrSdl();
-		}
+			// Clear buffer to avoid artifacts in case the window was resized
+			// TODO only do this if window was resized
+#ifdef USE_SDL3
+		if (!SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255)) ErrSdl();
+#else
+		if (SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255) <= -1) ErrSdl();
+#endif
+
+#ifdef USE_SDL3
+		if (!SDL_RenderClear(renderer)) ErrSdl();
+#else
+		if (SDL_RenderClear(renderer) <= -1) ErrSdl();
+#endif
+
+#ifdef USE_SDL3
+		if (!SDL_RenderCopy(renderer, texture.get(), nullptr, nullptr)) ErrSdl();
+#else
+		if (SDL_RenderCopy(renderer, texture.get(), nullptr, nullptr) <= -1) ErrSdl();
+#endif
 
-		if (SDL_RenderClear(renderer) <= -1) {
-			ErrSdl();
-		}
-		if (SDL_RenderCopy(renderer, texture.get(), nullptr, nullptr) <= -1) {
-			ErrSdl();
-		}
 		if (ControlMode == ControlTypes::VirtualGamepad) {
 			RenderVirtualGamepad(renderer);
 		}
@@ -256,9 +279,13 @@ void RenderPresent()
 		if (ControlMode == ControlTypes::VirtualGamepad) {
 			RenderVirtualGamepad(surface);
 		}
-		if (SDL_UpdateWindowSurface(ghMainWnd) <= -1) {
-			ErrSdl();
-		}
+
+#ifdef USE_SDL3
+		if (!SDL_UpdateWindowSurface(ghMainWnd)) ErrSdl();
+#else
+		if (SDL_UpdateWindowSurface(ghMainWnd) <= -1) ErrSdl();
+#endif
+
 		if (RenderDirectlyToOutputSurface)
 			PalSurface = GetOutputSurface();
 		LimitFrameRate();
diff --git a/Source/engine/dx.h b/Source/engine/dx.h
index ef7203604..ba14d57c8 100644
--- a/Source/engine/dx.h
+++ b/Source/engine/dx.h
@@ -5,7 +5,12 @@
  */
 #pragma once
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "engine/surface.hpp"
 
diff --git a/Source/engine/events.cpp b/Source/engine/events.cpp
index d4492bac9..2153c6e1d 100644
--- a/Source/engine/events.cpp
+++ b/Source/engine/events.cpp
@@ -2,6 +2,16 @@
 
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#else
+#include <SDL.h>
+
+#ifdef USE_SDL1
+#include "utils/sdl2_to_1_2_backports.h"
+#endif
+#endif
+
 #include "controls/input.h"
 #include "controls/padmapper.hpp"
 #include "engine/demomode.h"
@@ -46,9 +56,7 @@ bool FetchMessage_Real(SDL_Event *event, uint16_t *modState)
 #endif
 
 	SDL_Event e;
-	if (PollEvent(&e) == 0) {
-		return false;
-	}
+	if (!PollEvent(&e)) return false;
 
 	event->type = static_cast<SDL_EventType>(0);
 	*modState = SDL_GetModState();
@@ -59,25 +67,54 @@ bool FetchMessage_Real(SDL_Event *event, uint16_t *modState)
 	HandleTouchEvent(e);
 #endif
 
-	if (e.type == SDL_QUIT || IsCustomEvent(e.type)) {
+	if (e.type ==
+#ifdef USE_SDL3
+	        SDL_EVENT_QUIT
+#else
+	        SDL_QUIT
+#endif
+	    || IsCustomEvent(e.type)) {
 		*event = e;
 		return true;
 	}
 
-	if (IsAnyOf(e.type, SDL_KEYUP, SDL_KEYDOWN) && e.key.keysym.sym == SDLK_UNKNOWN) {
-		// Erroneous events generated by RG350 kernel.
-		return true;
-	}
+	// Erroneous events generated by RG350 kernel.
+#ifdef USE_SDL3
+	if (IsAnyOf(e.type, SDL_EVENT_KEY_DOWN, SDL_EVENT_KEY_UP) && e.key.key == SDLK_UNKNOWN) return true;
+#else
+	if (IsAnyOf(e.type, SDL_KEYUP, SDL_KEYDOWN) && e.key.keysym.sym == SDLK_UNKNOWN) return true;
+#endif
 
 #if !defined(USE_SDL1) && !defined(__vita__)
 	if (!movie_playing) {
 		// SDL generates mouse events from touch-based inputs to provide basic
 		// touchscreeen support for apps that don't explicitly handle touch events
-		if (IsAnyOf(e.type, SDL_MOUSEBUTTONDOWN, SDL_MOUSEBUTTONUP) && e.button.which == SDL_TOUCH_MOUSEID)
+		if (IsAnyOf(e.type,
+#ifdef USE_SDL3
+		        SDL_EVENT_MOUSE_BUTTON_DOWN, SDL_EVENT_MOUSE_BUTTON_UP
+#else
+		        SDL_MOUSEBUTTONDOWN, SDL_MOUSEBUTTONUP
+#endif
+		        )
+		    && e.button.which == SDL_TOUCH_MOUSEID) {
 			return true;
-		if (e.type == SDL_MOUSEMOTION && e.motion.which == SDL_TOUCH_MOUSEID)
+		}
+		if (e.type ==
+#ifdef USE_SDL3
+		        SDL_EVENT_MOUSE_MOTION
+#else
+		        SDL_MOUSEMOTION
+#endif
+		    && e.motion.which == SDL_TOUCH_MOUSEID) {
 			return true;
-		if (e.type == SDL_MOUSEWHEEL && e.wheel.which == SDL_TOUCH_MOUSEID)
+		}
+		if (e.type ==
+#ifdef USE_SDL3
+		        SDL_EVENT_MOUSE_WHEEL
+#else
+		        SDL_MOUSEWHEEL
+#endif
+		    && e.wheel.which == SDL_TOUCH_MOUSEID)
 			return true;
 	}
 #endif
@@ -94,6 +131,47 @@ bool FetchMessage_Real(SDL_Event *event, uint16_t *modState)
 		return true;
 
 	switch (e.type) {
+#ifdef USE_SDL3
+	case SDL_EVENT_GAMEPAD_AXIS_MOTION:
+	case SDL_EVENT_GAMEPAD_BUTTON_DOWN:
+	case SDL_EVENT_GAMEPAD_BUTTON_UP:
+	case SDL_EVENT_FINGER_DOWN:
+	case SDL_EVENT_FINGER_UP:
+	case SDL_EVENT_TEXT_EDITING:
+	case SDL_EVENT_TEXT_INPUT:
+	case SDL_EVENT_WINDOW_RESIZED:
+	case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED:
+	case SDL_EVENT_WINDOW_SHOWN:
+	case SDL_EVENT_WINDOW_MINIMIZED:
+	case SDL_EVENT_WINDOW_MAXIMIZED:
+	case SDL_EVENT_WINDOW_RESTORED:
+	case SDL_EVENT_WINDOW_HDR_STATE_CHANGED:
+	case SDL_EVENT_WINDOW_FOCUS_GAINED:
+	case SDL_EVENT_WINDOW_FOCUS_LOST:
+	case SDL_EVENT_MOUSE_WHEEL:
+	case SDL_EVENT_JOYSTICK_AXIS_MOTION:
+	case SDL_EVENT_JOYSTICK_HAT_MOTION:
+	case SDL_EVENT_JOYSTICK_BUTTON_DOWN:
+	case SDL_EVENT_JOYSTICK_BUTTON_UP:
+	case SDL_EVENT_MOUSE_MOTION:
+	case SDL_EVENT_MOUSE_BUTTON_DOWN:
+	case SDL_EVENT_MOUSE_BUTTON_UP:
+		*event = e;
+		break;
+	case SDL_EVENT_KEY_DOWN:
+	case SDL_EVENT_KEY_UP:
+		if (e.key.key == SDLK_UNKNOWN) {
+			return FalseAvail(e.key.down ? "SDL_EVENT_KEY_DOWN" : "SDL_EVENT_KEY_UP", e.key.key);
+		}
+		*event = e;
+		break;
+	case SDL_EVENT_AUDIO_DEVICE_ADDED:
+		return FalseAvail("SDL_EVENT_AUDIO_DEVICE_ADDED", e.adevice.which);
+	case SDL_EVENT_AUDIO_DEVICE_REMOVED:
+		return FalseAvail("SDL_EVENT_AUDIO_DEVICE_REMOVED", e.adevice.which);
+	case SDL_EVENT_KEYMAP_CHANGED:
+		return FalseAvail("SDL_EVENT_KEYMAP_CHANGED", 0);
+#else
 #if SDL_VERSION_ATLEAST(2, 0, 0)
 	case SDL_CONTROLLERAXISMOTION:
 	case SDL_CONTROLLERBUTTONDOWN:
@@ -131,6 +209,7 @@ bool FetchMessage_Real(SDL_Event *event, uint16_t *modState)
 	case SDL_KEYMAPCHANGED:
 		return FalseAvail("SDL_KEYMAPCHANGED", 0);
 #endif
+#endif
 #endif
 	default:
 		return FalseAvail("unknown", e.type);
diff --git a/Source/engine/events.hpp b/Source/engine/events.hpp
index e7d65ab5f..47eb3230a 100644
--- a/Source/engine/events.hpp
+++ b/Source/engine/events.hpp
@@ -2,13 +2,17 @@
 
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#else
 #include <SDL.h>
 
-#include "engine/point.hpp"
-
 #ifdef USE_SDL1
 #include "utils/sdl2_to_1_2_backports.h"
 #endif
+#endif
+
+#include "engine/point.hpp"
 
 namespace devilution {
 
diff --git a/Source/engine/palette.cpp b/Source/engine/palette.cpp
index 670c45179..98f3fb5a4 100644
--- a/Source/engine/palette.cpp
+++ b/Source/engine/palette.cpp
@@ -161,7 +161,7 @@ void SystemPaletteUpdated(int first, int ncolor)
 		return;
 
 	assert(Palette);
-	if (SDLC_SetSurfaceAndPaletteColors(PalSurface, Palette.get(), system_palette.data() + first, first, ncolor) < 0) {
+	if (!SDLC_SetSurfaceAndPaletteColors(PalSurface, Palette.get(), system_palette.data() + first, first, ncolor)) {
 		ErrSdl();
 	}
 }
diff --git a/Source/engine/render/scrollrt.cpp b/Source/engine/render/scrollrt.cpp
index 662d49b58..e8ee18aaf 100644
--- a/Source/engine/render/scrollrt.cpp
+++ b/Source/engine/render/scrollrt.cpp
@@ -9,6 +9,14 @@
 #include <cstddef>
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_keyboard.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include <ankerl/unordered_dense.h>
 
 #include "DiabloUI/ui_flags.hpp"
@@ -530,8 +538,16 @@ void DrawCell(const Surface &out, const Lightmap lightmap, Point tilePosition, P
 
 	bool transparency = TileHasAny(tilePosition, TileProperties::Transparent) && TransList[dTransVal[tilePosition.x][tilePosition.y]];
 #ifdef _DEBUG
-	if ((SDL_GetModState() & KMOD_ALT) != 0)
+	if ((SDL_GetModState() &
+#ifdef USE_SDL3
+	        SDL_KMOD_ALT
+#else
+	        KMOD_ALT
+#endif
+	        )
+	    != 0) {
 		transparency = false;
+	}
 #endif
 
 	const auto getFirstTileMaskLeft = [=](TileType tile) -> MaskType {
@@ -876,7 +892,14 @@ void DrawDungeon(const Surface &out, const Lightmap &lightmap, Point tilePositio
 			bool transparency = TransList[bMap];
 #ifdef _DEBUG
 			// Turn transparency off here for debugging
-			transparency = transparency && (SDL_GetModState() & KMOD_ALT) == 0;
+			transparency = transparency && (SDL_GetModState() &
+#ifdef USE_SDL3
+			                                   SDL_KMOD_ALT
+#else
+			                                   KMOD_ALT
+#endif
+			                                   )
+			        == 0;
 #endif
 			if (perPixelLighting) {
 				// Create a special lightmap buffer to bleed light up walls
@@ -1629,7 +1652,11 @@ void ClearScreenBuffer()
 		return;
 
 	assert(PalSurface != nullptr);
+#ifdef USE_SDL3
+	SDL_FillSurfaceRect(PalSurface, nullptr, 0);
+#else
 	SDL_FillRect(PalSurface, nullptr, 0);
+#endif
 }
 
 #ifdef _DEBUG
diff --git a/Source/gmenu.cpp b/Source/gmenu.cpp
index 0863055c8..d9549784b 100644
--- a/Source/gmenu.cpp
+++ b/Source/gmenu.cpp
@@ -9,7 +9,17 @@
 #include <cstdint>
 #include <optional>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_keycode.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "DiabloUI/ui_flags.hpp"
+#include "appfat.h"
 #include "control.h"
 #include "controls/axis_direction.h"
 #include "controls/controller_motion.h"
@@ -125,7 +135,11 @@ void GmenuDrawMenuItem(const Surface &out, TMenuItem *pItem, int y)
 		const uint16_t steps = std::max<uint16_t>(pItem->sliderSteps(), 2);
 		const uint16_t pos = SliderFillMin + step * (SliderFillMax - SliderFillMin) / steps;
 		SDL_Rect rect = MakeSdlRect(SliderValueLeft + uiPositionX, y + SliderValuePaddingTop, pos, SliderValueHeight);
+#ifdef USE_SDL3
+		SDL_FillSurfaceRect(out.surface, &rect, 205);
+#else
 		SDL_FillRect(out.surface, &rect, 205);
+#endif
 		ClxDraw(out, { SliderValueLeft + pos - SliderMarkerWidth / 2 + uiPositionX, y + SliderValuePaddingTop + SliderValueHeight - 1 }, (*option_cel)[0]);
 	}
 
diff --git a/Source/gmenu.h b/Source/gmenu.h
index 563496c2d..0e8ff88df 100644
--- a/Source/gmenu.h
+++ b/Source/gmenu.h
@@ -7,6 +7,12 @@
 
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_keycode.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "engine/surface.hpp"
 
 namespace devilution {
diff --git a/Source/hwcursor.cpp b/Source/hwcursor.cpp
index 98f8997d9..625e4d433 100644
--- a/Source/hwcursor.cpp
+++ b/Source/hwcursor.cpp
@@ -3,11 +3,21 @@
 #include <cstdint>
 #include <tuple>
 
-#if SDL_VERSION_ATLEAST(2, 0, 0)
+#ifdef USE_SDL3
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_mouse.h>
+#include <SDL3/SDL_render.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_version.h>
+#else
+#include <SDL_version.h>
+
+#ifndef USE_SDL1
 #include <SDL_mouse.h>
 #include <SDL_render.h>
 #include <SDL_surface.h>
 #endif
+#endif
 
 #include "DiabloUI/diabloui.h"
 
@@ -35,9 +45,16 @@ enum class HotpointPosition : uint8_t {
 Size ScaledSize(Size size)
 {
 	if (renderer != nullptr) {
-		float scaleX;
-		float scaleY;
+		float scaleX = 1.0F;
+		float scaleY = 1.0F;
+#ifdef USE_SDL3
+		if (!SDL_GetRenderScale(renderer, &scaleX, &scaleY)) {
+			LogError("SDL_GetRenderScale: {}", SDL_GetError());
+			SDL_ClearError();
+		}
+#else
 		SDL_RenderGetScale(renderer, &scaleX, &scaleY);
+#endif
 		size.width = static_cast<int>(size.width * scaleX);
 		size.height = static_cast<int>(size.height * scaleY);
 	}
@@ -83,7 +100,13 @@ bool SetHardwareCursorFromSurface(SDL_Surface *surface, HotpointPosition hotpoin
 		newCursor = SDLCursorUniquePtr { SDL_CreateColorCursor(surface, hotpoint.x, hotpoint.y) };
 	} else {
 		// SDL does not support BlitScaled from 8-bit to RGBA.
-		const SDLSurfaceUniquePtr converted { SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0) };
+		const SDLSurfaceUniquePtr converted {
+#ifdef USE_SDL3
+			SDL_ConvertSurface(surface, SDL_PIXELFORMAT_ARGB8888)
+#else
+			SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0)
+#endif
+		};
 
 		const SDLSurfaceUniquePtr scaledSurface = SDLWrap::CreateRGBSurfaceWithFormat(0, scaledSize.width, scaledSize.height, 32, SDL_PIXELFORMAT_ARGB8888);
 		if (ShouldUseBilinearScaling()) {
@@ -97,7 +120,11 @@ bool SetHardwareCursorFromSurface(SDL_Surface *surface, HotpointPosition hotpoin
 			Log("hwcursor: SetHardwareCursorFromSurface {}x{} scaled to {}x{} using nearest neighbour scaling",
 			    size.width, size.height, scaledSize.width, scaledSize.height);
 #endif
+#ifdef USE_SDL3
+			SDL_BlitSurfaceScaled(converted.get(), nullptr, scaledSurface.get(), nullptr, SDL_SCALEMODE_NEAREST);
+#else
 			SDL_BlitScaled(converted.get(), nullptr, scaledSurface.get(), nullptr);
+#endif
 		}
 		const Point hotpoint = GetHotpointPosition(*scaledSurface, hotpointPosition);
 		newCursor = SDLCursorUniquePtr { SDL_CreateColorCursor(scaledSurface.get(), hotpoint.x, hotpoint.y) };
@@ -107,7 +134,15 @@ bool SetHardwareCursorFromSurface(SDL_Surface *surface, HotpointPosition hotpoin
 		SDL_ClearError();
 		return false;
 	}
+#ifdef USE_SDL3
+	if (!SDL_SetCursor(newCursor.get())) {
+		LogError("SDL_SetCursor: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+#else
 	SDL_SetCursor(newCursor.get());
+#endif
 	CurrentCursor = std::move(newCursor);
 	return true;
 }
@@ -115,8 +150,29 @@ bool SetHardwareCursorFromSurface(SDL_Surface *surface, HotpointPosition hotpoin
 bool SetHardwareCursorFromClxSprite(ClxSprite sprite, HotpointPosition hotpointPosition)
 {
 	const OwnedSurface surface { sprite.width(), sprite.height() };
-	SDL_SetSurfacePalette(surface.surface, Palette.get());
-	SDL_SetColorKey(surface.surface, SDL_TRUE, 0);
+#ifdef USE_SDL3
+	if (!SDL_SetSurfacePalette(surface.surface, Palette.get())) {
+		LogError("SDL_SetSurfacePalette: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+	if (!SDL_SetSurfaceColorKey(surface.surface, true, 0)) {
+		LogError("SDL_SetSurfaceColorKey: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+#else
+	if (SDL_SetSurfacePalette(surface.surface, Palette.get()) != 0) {
+		LogError("SDL_SetSurfacePalette: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+	if (SDL_SetColorKey(surface.surface, SDL_TRUE, 0) != 0) {
+		LogError("SDL_SetColorKey: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+#endif
 	RenderClxSprite(surface, sprite, { 0, 0 });
 	return SetHardwareCursorFromSurface(surface.surface, hotpointPosition);
 }
@@ -142,8 +198,29 @@ bool SetHardwareCursorFromSprite(int pcurs)
 	// Transparent color must not be used in the sprite itself.
 	// Colors 1-127 are outside of the UI palette so are safe to use.
 	constexpr std::uint8_t TransparentColor = 1;
-	SDL_FillRect(out.surface, nullptr, TransparentColor);
-	SDL_SetColorKey(out.surface, 1, TransparentColor);
+#ifdef USE_SDL3
+	if (!SDL_FillSurfaceRect(out.surface, nullptr, TransparentColor)) {
+		LogError("SDL_FillSurfaceRect: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+	if (!SDL_SetSurfaceColorKey(out.surface, true, TransparentColor)) {
+		LogError("SDL_SetSurfaceColorKey: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+#else
+	if (SDL_FillRect(out.surface, nullptr, TransparentColor) != 0) {
+		LogError("SDL_FillRect: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+	if (SDL_SetColorKey(out.surface, 1, TransparentColor) != 0) {
+		LogError("SDL_SetColorKey: {}", SDL_GetError());
+		SDL_ClearError();
+		return false;
+	}
+#endif
 	DrawSoftwareCursor(out, { outlineWidth, size.height - outlineWidth - 1 }, pcurs);
 
 	const bool result = SetHardwareCursorFromSurface(
diff --git a/Source/hwcursor.hpp b/Source/hwcursor.hpp
index 2c23b5b59..df946aacd 100644
--- a/Source/hwcursor.hpp
+++ b/Source/hwcursor.hpp
@@ -7,7 +7,12 @@
 
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_version.h>
+#else
 #include <SDL_version.h>
+#endif
 
 #include "options.h"
 #include "utils/log.hpp"
@@ -139,7 +144,9 @@ inline void DoReinitializeHardwareCursor()
 
 inline bool IsHardwareCursorVisible()
 {
-#if SDL_VERSION_ATLEAST(2, 0, 0)
+#ifdef USE_SDL3
+	return SDL_CursorVisible();
+#elif SDL_VERSION_ATLEAST(2, 0, 0)
 	return SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE;
 #else
 	return false;
@@ -157,7 +164,13 @@ inline void SetHardwareCursorVisible(bool visible)
 #if LOG_HWCURSOR
 	Log("hwcursor: SetHardwareCursorVisible {}", visible);
 #endif
-	if (SDL_ShowCursor(visible ? SDL_ENABLE : SDL_DISABLE) < 0) {
+	if (
+#ifdef USE_SDL3
+	    visible ? SDL_ShowCursor() : SDL_HideCursor()
+#else
+	    SDL_ShowCursor(visible ? SDL_ENABLE : SDL_DISABLE) < 0
+#endif
+	) {
 		LogError("{}", SDL_GetError());
 		SDL_ClearError();
 	}
diff --git a/Source/init.cpp b/Source/init.cpp
index 93456c0f8..d2acda710 100644
--- a/Source/init.cpp
+++ b/Source/init.cpp
@@ -9,7 +9,13 @@
 #include <string>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_video.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <config.h>
 
 #include "DiabloUI/diabloui.h"
@@ -138,38 +144,77 @@ void init_create_window()
 void MainWndProc(const SDL_Event &event)
 {
 #ifndef USE_SDL1
-	if (event.type != SDL_WINDOWEVENT)
-		return;
-	switch (event.window.event) {
+#ifdef USE_SDL3
+	switch (event.type)
+#else
+	if (event.type != SDL_WINDOWEVENT) return;
+	switch (event.window.event)
+#endif
+	{
+#ifdef USE_SDL3
+	case SDL_EVENT_WINDOW_HIDDEN:
+	case SDL_EVENT_WINDOW_MINIMIZED:
+#else
 	case SDL_WINDOWEVENT_HIDDEN:
 	case SDL_WINDOWEVENT_MINIMIZED:
+#endif
 		gbActive = false;
 		break;
+#ifdef USE_SDL3
+	case SDL_EVENT_WINDOW_SHOWN:
+	case SDL_EVENT_WINDOW_EXPOSED:
+	case SDL_EVENT_WINDOW_RESTORED:
+#else
 	case SDL_WINDOWEVENT_SHOWN:
 	case SDL_WINDOWEVENT_EXPOSED:
 	case SDL_WINDOWEVENT_RESTORED:
+#endif
 		gbActive = true;
 		RedrawEverything();
 		break;
+#ifdef USE_SDL3
+	case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED:
+#else
 	case SDL_WINDOWEVENT_SIZE_CHANGED:
+#endif
 		ReinitializeHardwareCursor();
 		break;
+#ifdef USE_SDL3
+	case SDL_EVENT_WINDOW_MOUSE_LEAVE:
+#else
 	case SDL_WINDOWEVENT_LEAVE:
+#endif
 		sgbMouseDown = CLICK_NONE;
 		LastPlayerAction = PlayerActionType::None;
 		RedrawEverything();
 		break;
+#ifdef USE_SDL3
+	case SDL_EVENT_WINDOW_CLOSE_REQUESTED:
+#else
 	case SDL_WINDOWEVENT_CLOSE:
+#endif
 		diablo_quit(0);
 		break;
+#ifdef USE_SDL3
+	case SDL_EVENT_WINDOW_FOCUS_LOST:
+#else
 	case SDL_WINDOWEVENT_FOCUS_LOST:
+#endif
 		if (*GetOptions().Gameplay.pauseOnFocusLoss)
 			diablo_focus_pause();
 		break;
+#ifdef USE_SDL3
+	case SDL_EVENT_WINDOW_FOCUS_GAINED:
+#else
 	case SDL_WINDOWEVENT_FOCUS_GAINED:
+#endif
 		if (*GetOptions().Gameplay.pauseOnFocusLoss)
 			diablo_focus_unpause();
 		break;
+#ifdef USE_SDL3
+	default:
+		break;
+#else
 	case SDL_WINDOWEVENT_MOVED:
 	case SDL_WINDOWEVENT_RESIZED:
 	case SDL_WINDOWEVENT_MAXIMIZED:
@@ -179,6 +224,7 @@ void MainWndProc(const SDL_Event &event)
 	default:
 		LogVerbose("Unhandled SDL_WINDOWEVENT event: {:d}", event.window.event);
 		break;
+#endif
 	}
 #else
 	if (event.type != SDL_ACTIVEEVENT)
diff --git a/Source/init.hpp b/Source/init.hpp
index b6c7a5222..53492e413 100644
--- a/Source/init.hpp
+++ b/Source/init.hpp
@@ -9,7 +9,11 @@
 // https://github.com/bebbo/amiga-gcc/issues/413
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#else
 #include <SDL.h>
+#endif
 
 #ifdef UNPACKED_MPQS
 #include <string_view>
diff --git a/Source/interfac.cpp b/Source/interfac.cpp
index 3d65b1af3..37518ebc3 100644
--- a/Source/interfac.cpp
+++ b/Source/interfac.cpp
@@ -9,7 +9,12 @@
 #include <string>
 
 #ifdef USE_SDL3
+#include <SDL3/SDL_error.h>
 #include <SDL3/SDL_events.h>
+#include <SDL3/SDL_keyboard.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_timer.h>
 #include <SDL3/SDL_version.h>
 #else
 #include <SDL.h>
@@ -66,7 +71,11 @@ const int BarPos[3][2] = { { 53, 37 }, { 53, 421 }, { 53, 37 } };
 
 OptionalOwnedClxSpriteList ArtCutsceneWidescreen;
 
+#ifdef USE_SDL3
+SdlEventType CustomEventType = SDL_EVENT_USER;
+#else
 SdlEventType CustomEventType = SDL_USEREVENT;
+#endif
 
 Cutscenes GetCutSceneFromLevelType(dungeon_type type)
 {
@@ -220,7 +229,11 @@ void DrawCutsceneBackground()
 {
 	const Rectangle &uiRectangle = GetUIRectangle();
 	const Surface &out = GlobalBackBuffer();
+#ifdef USE_SDL3
+	SDL_FillSurfaceRect(out.surface, nullptr, 0);
+#else
 	SDL_FillRect(out.surface, nullptr, 0x000000);
+#endif
 	if (ArtCutsceneWidescreen) {
 		const ClxSprite sprite = (*ArtCutsceneWidescreen)[0];
 		RenderClxSprite(out, sprite, { uiRectangle.position.x - (sprite.width() - uiRectangle.size.width) / 2, uiRectangle.position.y });
@@ -238,7 +251,11 @@ void DrawCutsceneForeground()
 	    out.region.y + BarPos[progress_id][1] + uiRectangle.position.y,
 	    sgdwProgress,
 	    ProgressHeight);
+#ifdef USE_SDL3
+	SDL_FillSurfaceRect(out.surface, &rect, BarColor[progress_id]);
+#else
 	SDL_FillRect(out.surface, &rect, BarColor[progress_id]);
+#endif
 
 	if (DiabloUiSurface() == PalSurface)
 		BltFast(&rect, &rect);
@@ -293,9 +310,15 @@ bool HandleProgressBarUpdate()
 	SDL_Event event;
 	// We use the real `PollEvent` here instead of `FetchMessage`
 	// to process real events rather than the recorded ones in demo mode.
-	while (PollEvent(&event) != 0) {
+	while (PollEvent(&event)) {
 		CheckShouldSkipRendering();
-		if (event.type != SDL_QUIT) {
+		if (event.type !=
+#ifdef USE_SDL3
+		    SDL_EVENT_QUIT
+#else
+		    SDL_QUIT
+#endif
+		) {
 			HandleMessage(event, SDL_GetModState());
 		}
 		if (ProgressEventHandlerState.done) return false;
@@ -465,7 +488,13 @@ void DoLoad(interface_mode uMsg)
 		SDL_Event event;
 		CustomEventToSdlEvent(event, WM_ERROR);
 		event.user.data1 = new std::string(std::move(loadResult).error());
-		if (SDL_PushEvent(&event) < 0) {
+		if (
+#ifdef USE_SDL3
+		    !SDL_PushEvent(&event)
+#else
+		    SDL_PushEvent(&event) < 0
+#endif
+		) {
 			LogError("Failed to send WM_ERROR {}", SDL_GetError());
 			SDL_ClearError();
 		}
@@ -477,7 +506,13 @@ void DoLoad(interface_mode uMsg)
 
 	SDL_Event event;
 	CustomEventToSdlEvent(event, WM_DONE);
-	if (SDL_PushEvent(&event) < 0) {
+	if (
+#ifdef USE_SDL3
+	    !SDL_PushEvent(&event)
+#else
+	    SDL_PushEvent(&event) < 0
+#endif
+	) {
 		LogError("Failed to send WM_DONE {}", SDL_GetError());
 		SDL_ClearError();
 	}
@@ -592,7 +627,13 @@ void interface_msg_pump()
 	SDL_Event event;
 	uint16_t modState;
 	while (FetchMessage(&event, &modState)) {
-		if (event.type != SDL_QUIT) {
+		if (event.type !=
+#ifdef USE_SDL3
+		    SDL_EVENT_QUIT
+#else
+		    SDL_QUIT
+#endif
+		) {
 			HandleMessage(event, modState);
 		}
 	}
@@ -609,7 +650,13 @@ void IncProgress(uint32_t steps)
 	if (!HeadlessMode && sgdwProgress != prevProgress) {
 		SDL_Event event;
 		CustomEventToSdlEvent(event, WM_PROGRESS);
-		if (SDL_PushEvent(&event) < 0) {
+		if (
+#ifdef USE_SDL3
+		    !SDL_PushEvent(&event)
+#else
+		    SDL_PushEvent(&event) < 0
+#endif
+		) {
 			LogError("Failed to send WM_PROGRESS {}", SDL_GetError());
 			SDL_ClearError();
 		}
diff --git a/Source/inv.cpp b/Source/inv.cpp
index cbcb8f54b..b0071d39c 100644
--- a/Source/inv.cpp
+++ b/Source/inv.cpp
@@ -9,6 +9,13 @@
 #include <optional>
 #include <utility>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_keyboard.h>
+#include <SDL3/SDL_rect.h>
+#else
+#include <SDL.h>
+#endif
+
 #include <fmt/format.h>
 
 #include "DiabloUI/ui_flags.hpp"
@@ -34,6 +41,7 @@
 #include "qol/stash.h"
 #include "stores.h"
 #include "towners.h"
+#include "utils/display.h"
 #include "utils/format_int.hpp"
 #include "utils/is_of.hpp"
 #include "utils/language.h"
@@ -1088,7 +1096,11 @@ void StartGoldDrop()
 
 	const Point start = GetPanelPosition(UiPanels::Inventory, { 67, 128 });
 	SDL_Rect rect = MakeSdlRect(start.x, start.y, 180, 20);
+#ifdef USE_SDL3
+	SDL_SetTextInputArea(ghMainWnd, &rect, 0);
+#else
 	SDL_SetTextInputRect(&rect);
+#endif
 
 	OpenGoldDrop(invIndex, max);
 }
diff --git a/Source/items.cpp b/Source/items.cpp
index a81f767a3..96f046ed4 100644
--- a/Source/items.cpp
+++ b/Source/items.cpp
@@ -19,7 +19,12 @@
 #include <utility>
 #include <vector>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_timer.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <fmt/core.h>
 
 #include "DiabloUI/ui_flags.hpp"
diff --git a/Source/loadsave.cpp b/Source/loadsave.cpp
index 71c2a5c1f..29ac162dd 100644
--- a/Source/loadsave.cpp
+++ b/Source/loadsave.cpp
@@ -12,7 +12,6 @@
 #include <numeric>
 #include <string>
 
-#include <SDL.h>
 #include <ankerl/unordered_dense.h>
 #include <expected.hpp>
 
diff --git a/Source/menu.cpp b/Source/menu.cpp
index 6a7241a42..98f5a8a4d 100644
--- a/Source/menu.cpp
+++ b/Source/menu.cpp
@@ -6,6 +6,13 @@
 
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "DiabloUI/diabloui.h"
 #include "DiabloUI/settingsmenu.h"
 #include "engine/assets.hpp"
@@ -137,7 +144,11 @@ bool mainmenu_select_hero_dialog(GameData *gameData)
 
 void mainmenu_wait_for_button_sound()
 {
+#ifdef USE_SDL3
+	SDL_FillSurfaceRect(DiabloUiSurface(), nullptr, 0);
+#else
 	SDL_FillRect(DiabloUiSurface(), nullptr, 0x000000);
+#endif
 	UiFadeIn();
 	SDL_Delay(350); // delay to let button pressed sound finish playing
 }
diff --git a/Source/movie.cpp b/Source/movie.cpp
index cb70458fe..c662095e8 100644
--- a/Source/movie.cpp
+++ b/Source/movie.cpp
@@ -6,6 +6,13 @@
 
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_keycode.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "controls/control_mode.hpp"
 #include "controls/plrctrls.h"
 #include "diablo.h"
@@ -53,12 +60,30 @@ void play_movie(const char *pszMovie, bool userCanClose)
 					}
 				}
 				switch (event.type) {
+#ifdef USE_SDL3
+				case SDL_EVENT_KEY_DOWN:
+				case SDL_EVENT_MOUSE_BUTTON_UP:
+#else
 				case SDL_KEYDOWN:
 				case SDL_MOUSEBUTTONUP:
-					if (userCanClose || (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE))
+#endif
+					if (userCanClose || (
+#ifdef USE_SDL3
+					        event.type == SDL_EVENT_KEY_DOWN && event.key.key == SDLK_ESCAPE
+#else
+					        event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE
+#endif
+					        ))
 						movie_playing = false;
 					break;
-#ifndef USE_SDL1
+#ifdef USE_SDL3
+				case SDL_EVENT_WINDOW_FOCUS_LOST:
+					if (*GetOptions().Gameplay.pauseOnFocusLoss) diablo_focus_pause();
+					break;
+				case SDL_EVENT_WINDOW_FOCUS_GAINED:
+					if (*GetOptions().Gameplay.pauseOnFocusLoss) diablo_focus_unpause();
+					break;
+#elif !defined(USE_SDL1)
 				case SDL_WINDOWEVENT:
 					if (*GetOptions().Gameplay.pauseOnFocusLoss) {
 						if (event.window.event == SDL_WINDOWEVENT_FOCUS_LOST)
@@ -77,7 +102,11 @@ void play_movie(const char *pszMovie, bool userCanClose)
 					}
 					break;
 #endif
+#ifdef USE_SDL3
+				case SDL_EVENT_QUIT:
+#else
 				case SDL_QUIT:
+#endif
 					SVidPlayEnd();
 					diablo_quit(0);
 				}
diff --git a/Source/msg.cpp b/Source/msg.cpp
index 14e49252c..1ebbe08f8 100644
--- a/Source/msg.cpp
+++ b/Source/msg.cpp
@@ -11,6 +11,12 @@
 #include <list>
 #include <memory>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include <ankerl/unordered_dense.h>
 #include <fmt/format.h>
 
diff --git a/Source/nthread.cpp b/Source/nthread.cpp
index 079e3c4b9..c563923f5 100644
--- a/Source/nthread.cpp
+++ b/Source/nthread.cpp
@@ -8,7 +8,11 @@
 #include <cstddef>
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_timer.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "diablo.h"
 #include "engine/animationinfo.h"
diff --git a/Source/panels/console.cpp b/Source/panels/console.cpp
index 3ec118ce1..272012d80 100644
--- a/Source/panels/console.cpp
+++ b/Source/panels/console.cpp
@@ -9,6 +9,9 @@
 
 #ifdef USE_SDL3
 #include <SDL3/SDL_events.h>
+#include <SDL3/SDL_keyboard.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_scancode.h>
 #else
 #include <SDL.h>
 
@@ -31,6 +34,7 @@
 #include "lua/autocomplete.hpp"
 #include "lua/repl.hpp"
 #include "utils/algorithm/container.hpp"
+#include "utils/display.h"
 #include "utils/sdl_geometry.h"
 #include "utils/str_cat.hpp"
 #include "utils/str_split.hpp"
@@ -452,7 +456,13 @@ bool ConsoleHandleEvent(const SDL_Event &event)
 {
 	if (!IsConsoleVisible) {
 		// Make console open on the top-left keyboard key even if it is not a backtick.
-		if (event.type == SDL_KEYDOWN && event.key.keysym.scancode == SDL_SCANCODE_GRAVE) {
+		if (
+#ifdef USE_SDL3
+		    event.type == SDL_EVENT_KEY_DOWN && event.key.scancode == SDL_SCANCODE_GRAVE
+#else
+		    event.type == SDL_KEYDOWN && event.key.keysym.scancode == SDL_SCANCODE_GRAVE
+#endif
+		) {
 			OpenConsole();
 			return true;
 		}
@@ -463,10 +473,23 @@ bool ConsoleHandleEvent(const SDL_Event &event)
 		return true;
 	}
 	const auto modState = SDL_GetModState();
-	const bool isShift = (modState & KMOD_SHIFT) != 0;
+	const bool isShift = (modState &
+#ifdef USE_SDL3
+	                         SDL_KMOD_SHIFT
+#else
+	                         KMOD_SHIFT
+#endif
+	                         )
+	    != 0;
 	switch (event.type) {
+#ifdef USE_SDL3
+	case SDL_EVENT_KEY_DOWN:
+		switch (event.key.key)
+#else
 	case SDL_KEYDOWN:
-		switch (event.key.keysym.sym) {
+		switch (event.key.keysym.sym)
+#endif
+		{
 		case SDLK_ESCAPE:
 			if (!AutocompleteSuggestions.empty()) {
 				AutocompleteSuggestions.clear();
@@ -517,14 +540,26 @@ bool ConsoleHandleEvent(const SDL_Event &event)
 		case SDLK_PAGEDOWN:
 			--PendingScrollPages;
 			return true;
+#ifdef USE_SDL3
+		case SDLK_L:
+#else
 		case SDLK_l:
+#endif
 			ClearConsole();
 			return true;
 		default:
 			return false;
 		}
 		break;
-#if SDL_VERSION_ATLEAST(2, 0, 0)
+#ifdef USE_SDL3
+	case SDL_EVENT_MOUSE_WHEEL:
+		if (event.wheel.integer_y > 0) {
+			ScrollOffset += ScrollStep;
+		} else if (event.wheel.integer_y < 0) {
+			ScrollOffset -= ScrollStep;
+		}
+		return true;
+#elif SDL_VERSION_ATLEAST(2, 0, 0)
 	case SDL_MOUSEWHEEL:
 		if (event.wheel.y > 0) {
 			ScrollOffset += ScrollStep;
@@ -585,8 +620,13 @@ void DrawConsole(const Surface &out)
 
 	if (FirstRender) {
 		SDL_Rect sdlInputRect = MakeSdlRect(InputRect);
+#ifdef USE_SDL3
+		SDL_SetTextInputArea(ghMainWnd, &sdlInputRect, ConsoleInputState.cursorPosition());
+		SDL_StartTextInput(ghMainWnd);
+#else
 		SDL_SetTextInputRect(&sdlInputRect);
 		SDL_StartTextInput();
+#endif
 		FirstRender = false;
 		if (ConsoleLines.empty()) {
 			InitConsole();
diff --git a/Source/pfile.cpp b/Source/pfile.cpp
index b6c7ff01f..f8012f27c 100644
--- a/Source/pfile.cpp
+++ b/Source/pfile.cpp
@@ -12,6 +12,13 @@
 #include <ankerl/unordered_dense.h>
 #include <expected.hpp>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_iostream.h>
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include "codec.h"
 #include "engine/load_file.hpp"
 #include "engine/render/primitive_render.hpp"
@@ -281,20 +288,37 @@ void CreateDetailDiffs(std::string_view prefix, std::string_view memoryMapFile,
 	// Note: Detail diffs are currently only supported in unit tests
 	const std::string memoryMapFileAssetName = StrCat(paths::BasePath(), "/test/fixtures/memory_map/", memoryMapFile, ".txt");
 
+#ifdef USE_SDL3
+	SDL_IOStream *handle = SDL_IOFromFile(memoryMapFileAssetName.c_str(), "r");
+#else
 	SDL_RWops *handle = SDL_RWFromFile(memoryMapFileAssetName.c_str(), "r");
+#endif
 	if (handle == nullptr) {
 		app_fatal(StrCat("MemoryMapFile ", memoryMapFile, " is missing"));
 		return;
 	}
 
-	const size_t readBytes = static_cast<size_t>(SDL_RWsize(handle));
+	const size_t readBytes = static_cast<size_t>(
+#ifdef USE_SDL3
+	    SDL_GetIOSize(handle)
+#else
+	    SDL_RWsize(handle)
+#endif
+	);
 	const std::unique_ptr<std::byte[]> memoryMapFileData { new std::byte[readBytes] };
-#if SDL_VERSION_ATLEAST(2, 0, 0)
+#ifdef USE_SDL3
+	SDL_ReadIO(handle, memoryMapFileData.get(), readBytes);
+#elif SDL_VERSION_ATLEAST(2, 0, 0)
 	SDL_RWread(handle, memoryMapFileData.get(), readBytes, 1);
 #else
 	SDL_RWread(handle, memoryMapFileData.get(), static_cast<int>(readBytes), 1);
 #endif
+
+#ifdef USE_SDL3
+	SDL_CloseIO(handle);
+#else
 	SDL_RWclose(handle);
+#endif
 
 	const std::string_view buffer(reinterpret_cast<const char *>(memoryMapFileData.get()), readBytes);
 
diff --git a/Source/player.cpp b/Source/player.cpp
index fec8fa23f..23688db7c 100644
--- a/Source/player.cpp
+++ b/Source/player.cpp
@@ -7,6 +7,13 @@
 #include <cmath>
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_events.h>
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include <fmt/core.h>
 
 #include "control.h"
diff --git a/Source/plrmsg.cpp b/Source/plrmsg.cpp
index 782c16227..9d45ac84e 100644
--- a/Source/plrmsg.cpp
+++ b/Source/plrmsg.cpp
@@ -9,6 +9,12 @@
 #include <array>
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include <fmt/format.h>
 
 #include "control.h"
@@ -27,7 +33,7 @@ namespace {
 
 struct PlayerMessage {
 	/** Time message was received */
-	Uint32 time;
+	uint32_t time;
 	/** The default text color */
 	UiFlags style;
 	/** The text message to display on screen */
diff --git a/Source/plrmsg.h b/Source/plrmsg.h
index 7d3c0b67f..4c038ee2a 100644
--- a/Source/plrmsg.h
+++ b/Source/plrmsg.h
@@ -9,8 +9,6 @@
 #include <string>
 #include <string_view>
 
-#include <SDL.h>
-
 #include "DiabloUI/ui_flags.hpp"
 #include "engine/surface.hpp"
 #include "player.h"
diff --git a/Source/restrict.cpp b/Source/restrict.cpp
index 654bdb0ab..180cb0703 100644
--- a/Source/restrict.cpp
+++ b/Source/restrict.cpp
@@ -4,23 +4,37 @@
  * Implementation of functionality for checking if the game will be able run on the system.
  */
 
+#include <string>
+
 #include "appfat.h"
 #include "utils/file_util.h"
 #include "utils/paths.h"
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_iostream.h>
+#else
 #include <SDL.h>
+#endif
 
 namespace devilution {
 
 void ReadOnlyTest()
 {
 	const std::string path = paths::PrefPath() + "Diablo1ReadOnlyTest.foo";
+#ifdef USE_SDL3
+	SDL_IOStream *file = SDL_IOFromFile(path.c_str(), "w");
+#else
 	SDL_RWops *file = SDL_RWFromFile(path.c_str(), "w");
+#endif
 	if (file == nullptr) {
 		DirErrorDlg(paths::PrefPath());
 	}
 
+#ifdef USE_SDL3
+	SDL_CloseIO(file);
+#else
 	SDL_RWclose(file);
+#endif
 	RemoveFile(path.c_str());
 }
 
diff --git a/Source/storm/storm_svid.cpp b/Source/storm/storm_svid.cpp
index 44e3587a1..f1aaae8b4 100644
--- a/Source/storm/storm_svid.cpp
+++ b/Source/storm/storm_svid.cpp
@@ -5,6 +5,16 @@
 #include <cstring>
 #include <optional>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_pixels.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_render.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
+
 #include <SmackerDecoder.h>
 
 #ifndef NOSOUND
@@ -39,7 +49,7 @@ constexpr uint64_t TimeMsToSmk(uint64_t ms) { return ms * SmackerTimeUnit; }
 constexpr uint64_t TimeSmkToMs(uint64_t time) { return time / SmackerTimeUnit; };
 uint64_t GetTicksSmk()
 {
-#if SDL_VERSION_ATLEAST(2, 0, 18)
+#if SDL_VERSION_ATLEAST(2, 0, 18) && !defined(USE_SDL3)
 	return TimeMsToSmk(SDL_GetTicks64());
 #else
 	return TimeMsToSmk(SDL_GetTicks());
@@ -180,7 +190,15 @@ void UpdatePalette()
 	if (SDL_SetSurfacePalette(SVidSurface.get(), SVidPalette.get()) <= -1) {
 		ErrSdl();
 	}
-	if (GetOutputSurface()->format->BitsPerPixel == 8) {
+
+	const SDL_Surface *surface = GetOutputSurface();
+	if (
+#ifdef USE_SDL3
+	    SDL_BITSPERPIXEL(surface->format)
+#else
+	    surface->format->BitsPerPixel
+#endif
+	    == 8) {
 		if (SDL_SetSurfacePalette(GetOutputSurface(), SVidPalette.get()) <= -1) {
 			ErrSdl();
 		}
@@ -192,7 +210,13 @@ bool BlitFrame()
 {
 #ifndef USE_SDL1
 	if (renderer != nullptr) {
-		if (SDL_BlitSurface(SVidSurface.get(), nullptr, GetOutputSurface(), nullptr) <= -1) {
+		if (
+#ifdef USE_SDL3
+		    SDL_BlitSurface(SVidSurface.get(), nullptr, GetOutputSurface(), nullptr)
+#else
+		    SDL_BlitSurface(SVidSurface.get(), nullptr, GetOutputSurface(), nullptr) <= -1
+#endif
+		) {
 			Log("{}", SDL_GetError());
 			return false;
 		}
@@ -203,7 +227,12 @@ bool BlitFrame()
 #ifdef USE_SDL1
 		const bool isIndexedOutputFormat = SDLBackport_IsPixelFormatIndexed(outputSurface->format);
 #else
+
+#ifdef USE_SDL3
+		const SDL_PixelFormat wndFormat = SDL_GetWindowPixelFormat(ghMainWnd);
+#else
 		const Uint32 wndFormat = SDL_GetWindowPixelFormat(ghMainWnd);
+#endif
 		const bool isIndexedOutputFormat = SDL_ISPIXELFORMAT_INDEXED(wndFormat);
 #endif
 		SDL_Rect outputRect;
@@ -224,7 +253,13 @@ bool BlitFrame()
 		if (isIndexedOutputFormat
 		    || outputSurface->w == static_cast<int>(SVidWidth)
 		    || outputSurface->h == static_cast<int>(SVidHeight)) {
-			if (SDL_BlitSurface(SVidSurface.get(), nullptr, outputSurface, &outputRect) <= -1) {
+			if (
+#ifdef USE_SDL3
+			    SDL_BlitSurface(SVidSurface.get(), nullptr, outputSurface, &outputRect)
+#else
+			    SDL_BlitSurface(SVidSurface.get(), nullptr, outputSurface, &outputRect) <= -1
+#endif
+			) {
 				ErrSdl();
 			}
 		} else {
@@ -235,7 +270,13 @@ bool BlitFrame()
 #else
 			SDLSurfaceUniquePtr converted = SDLWrap::ConvertSurfaceFormat(SVidSurface.get(), wndFormat, 0);
 #endif
-			if (SDL_BlitScaled(converted.get(), nullptr, outputSurface, &outputRect) <= -1) {
+			if (
+#ifdef USE_SDL3
+			    SDL_BlitSurfaceScaled(converted.get(), nullptr, outputSurface, &outputRect, SDL_SCALEMODE_LINEAR)
+#else
+			    SDL_BlitScaled(converted.get(), nullptr, outputSurface, &outputRect) <= -1
+#endif
+			) {
 				Log("{}", SDL_GetError());
 				return false;
 			}
@@ -264,7 +305,7 @@ bool SVidPlayBegin(const char *filename, int flags)
 	// 0x800000 // Edge detection
 	// 0x200800 // Clear FB
 
-	SDL_RWops *videoStream = OpenAssetAsSdlRwOps(filename);
+	auto *videoStream = OpenAssetAsSdlRwOps(filename);
 	SVidHandle = Smacker_Open(videoStream);
 	if (!SVidHandle.isValid) {
 		return false;
@@ -312,7 +353,14 @@ bool SVidPlayBegin(const char *filename, int flags)
 		const int renderWidth = static_cast<int>(SVidWidth);
 		const int renderHeight = static_cast<int>(SVidHeight);
 		texture = SDLWrap::CreateTexture(renderer, DEVILUTIONX_DISPLAY_TEXTURE_FORMAT, SDL_TEXTUREACCESS_STREAMING, renderWidth, renderHeight);
-		if (SDL_RenderSetLogicalSize(renderer, renderWidth, renderHeight) <= -1) {
+		if (
+#ifdef USE_SDL3
+		    !SDL_SetRenderLogicalPresentation(renderer, renderWidth, renderHeight,
+		        *GetOptions().Graphics.integerScaling ? SDL_LOGICAL_PRESENTATION_INTEGER_SCALE : SDL_LOGICAL_PRESENTATION_STRETCH)
+#else
+		    SDL_RenderSetLogicalSize(renderer, renderWidth, renderHeight) <= -1
+#endif
+		) {
 			ErrSdl();
 		}
 	}
@@ -330,7 +378,11 @@ bool SVidPlayBegin(const char *filename, int flags)
 #endif
 
 	// Set the background to black.
+#ifdef USE_SDL3
+	SDL_FillSurfaceRect(GetOutputSurface(), nullptr, 0x000000);
+#else
 	SDL_FillRect(GetOutputSurface(), nullptr, 0x000000);
+#endif
 
 	// The buffer for the frame. It is not the same as the SDL surface because the SDL surface also has pitch padding.
 	SVidFrameBuffer = std::unique_ptr<uint8_t[]> { new uint8_t[static_cast<size_t>(SVidWidth * SVidHeight)] };
@@ -415,7 +467,14 @@ void SVidPlayEnd()
 #ifndef USE_SDL1
 	if (renderer != nullptr) {
 		texture = SDLWrap::CreateTexture(renderer, DEVILUTIONX_DISPLAY_TEXTURE_FORMAT, SDL_TEXTUREACCESS_STREAMING, gnScreenWidth, gnScreenHeight);
-		if (renderer != nullptr && SDL_RenderSetLogicalSize(renderer, gnScreenWidth, gnScreenHeight) <= -1) {
+		if (
+#ifdef USE_SDL3
+		    !SDL_SetRenderLogicalPresentation(renderer, gnScreenWidth, gnScreenHeight,
+		        *GetOptions().Graphics.integerScaling ? SDL_LOGICAL_PRESENTATION_INTEGER_SCALE : SDL_LOGICAL_PRESENTATION_STRETCH)
+#else
+		    SDL_RenderSetLogicalSize(renderer, gnScreenWidth, gnScreenHeight) <= -1
+#endif
+		) {
 			ErrSdl();
 		}
 	}
diff --git a/Source/tmsg.cpp b/Source/tmsg.cpp
index 1ee1cf137..4307ccf94 100644
--- a/Source/tmsg.cpp
+++ b/Source/tmsg.cpp
@@ -3,9 +3,14 @@
  *
  * Implementation of functionality transmitting chat messages.
  */
+#include <cstdint>
 #include <list>
 
-#include <cstdint>
+#ifdef USE_SDL3
+#include <SDL3/SDL_timer.h>
+#else
+#include <SDL.h>
+#endif
 
 #include "diablo.h"
 #include "tmsg.h"
diff --git a/Source/track.cpp b/Source/track.cpp
index 5e106a720..5804ed136 100644
--- a/Source/track.cpp
+++ b/Source/track.cpp
@@ -5,8 +5,6 @@
  */
 #include "track.h"
 
-#include <SDL.h>
-
 #include "controls/control_mode.hpp"
 #include "controls/game_controls.h"
 #include "controls/plrctrls.h"
diff --git a/Source/utils/display.cpp b/Source/utils/display.cpp
index 0150ee9c5..6e72e7a84 100644
--- a/Source/utils/display.cpp
+++ b/Source/utils/display.cpp
@@ -5,6 +5,22 @@
 #include <cstdint>
 #include <utility>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_hints.h>
+#include <SDL3/SDL_init.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_render.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_video.h>
+#else
+#include <SDL.h>
+#ifdef USE_SDL1
+#include "utils/sdl2_to_1_2_backports.h"
+#else
+#include "utils/sdl2_backports.h"
+#endif
+#endif
+
 #ifdef __vita__
 #include <psp2/power.h>
 #endif
@@ -136,11 +152,16 @@ const auto OptionChangeHandlerFullscreen = (GetOptions().Graphics.fullscreen.Set
 
 void OptionGrabInputChanged()
 {
-#ifdef USE_SDL1
-	SDL_WM_GrabInput(*GetOptions().Gameplay.grabInput ? SDL_GRAB_ON : SDL_GRAB_OFF);
-#else
-	if (ghMainWnd != nullptr)
+#ifdef USE_SDL3
+	if (ghMainWnd != nullptr) {
+		SDL_SetWindowMouseGrab(ghMainWnd, *GetOptions().Gameplay.grabInput);
+	}
+#elif !defined(USE_SDL1)
+	if (ghMainWnd != nullptr) {
 		SDL_SetWindowGrab(ghMainWnd, *GetOptions().Gameplay.grabInput ? SDL_TRUE : SDL_FALSE);
+	}
+#else
+	SDL_WM_GrabInput(*GetOptions().Gameplay.grabInput ? SDL_GRAB_ON : SDL_GRAB_OFF);
 #endif
 }
 const auto OptionChangeHandlerGrabInput = (GetOptions().Gameplay.grabInput.SetValueChangedCallback(OptionGrabInputChanged), true);
@@ -267,11 +288,23 @@ const auto OptionChangeHandlerVSync = (GetOptions().Graphics.frameRateControl.Se
 
 struct DisplayModeComparator {
 	Size size;
+#ifdef USE_SDL3
+	SDL_PixelFormat pixelFormat;
+#else
 	SDL_PixelFormatEnum pixelFormat;
+#endif
 
 	// Is `a` better than `b`?
+#ifdef USE_SDL3
+	[[nodiscard]] bool operator()(const SDL_DisplayMode *aPtr, const SDL_DisplayMode *bPtr)
+#else
 	[[nodiscard]] bool operator()(const SDL_DisplayMode &a, const SDL_DisplayMode &b)
+#endif
 	{
+#ifdef USE_SDL3
+		const SDL_DisplayMode &a = *aPtr;
+		const SDL_DisplayMode &b = *bPtr;
+#endif
 		const int dwa = a.w - size.width;
 		const int dha = a.h - size.height;
 		const int dwb = b.w - size.width;
@@ -302,11 +335,29 @@ struct DisplayModeComparator {
 } // namespace
 
 #if SDL_VERSION_ATLEAST(2, 0, 0)
-SDL_DisplayMode GetNearestDisplayMode(Size preferredSize, SDL_PixelFormatEnum preferredPixelFormat)
+SDL_DisplayMode GetNearestDisplayMode(Size preferredSize,
+#ifdef USE_SDL3
+    SDL_PixelFormat preferredPixelFormat
+#else
+    SDL_PixelFormatEnum preferredPixelFormat
+#endif
+)
 {
-	SDL_DisplayMode nearestDisplayMode;
-	if (SDL_GetWindowDisplayMode(ghMainWnd, &nearestDisplayMode) != 0)
-		ErrSdl();
+	SDL_DisplayMode *nearestDisplayMode = nullptr;
+#ifdef USE_SDL3
+	const SDL_DisplayMode *fullscreenMode = SDL_GetWindowFullscreenMode(ghMainWnd);
+	if (fullscreenMode == nullptr) ErrSdl();
+	const SDL_DisplayID displayId = SDL_GetDisplayForWindow(ghMainWnd);
+	if (displayId == 0) ErrSdl();
+	int modeCount;
+	SDLUniquePtr<SDL_DisplayMode *> modes { SDL_GetFullscreenDisplayModes(displayId, &modeCount) };
+	if (modes == nullptr) ErrSdl();
+	nearestDisplayMode = *std::min_element(
+	    modes.get(), modes.get() + modeCount, DisplayModeComparator { preferredSize, preferredPixelFormat });
+#else
+	SDL_DisplayMode ownedNearestDisplayMode;
+	if (SDL_GetWindowDisplayMode(ghMainWnd, &ownedNearestDisplayMode) != 0) ErrSdl();
+	nearestDisplayMode = &ownedNearestDisplayMode;
 
 	const int displayIndex = SDL_GetWindowDisplayIndex(ghMainWnd);
 	const int modeCount = SDL_GetNumDisplayModes(displayIndex);
@@ -321,17 +372,18 @@ SDL_DisplayMode GetNearestDisplayMode(Size preferredSize, SDL_PixelFormatEnum pr
 		modes.push_back(displayMode);
 	}
 	if (!modes.empty()) {
-		nearestDisplayMode = *std::min_element(
+		nearestDisplayMode = &*std::min_element(
 		    modes.begin(), modes.end(), DisplayModeComparator { preferredSize, preferredPixelFormat });
 	}
+#endif
 
 	LogVerbose("Nearest display mode to {}x{} is {}x{} {}bpp {}Hz",
 	    preferredSize.width, preferredSize.height,
-	    nearestDisplayMode.w, nearestDisplayMode.h,
-	    SDL_BITSPERPIXEL(nearestDisplayMode.format),
-	    nearestDisplayMode.refresh_rate);
+	    nearestDisplayMode->w, nearestDisplayMode->h,
+	    SDL_BITSPERPIXEL(nearestDisplayMode->format),
+	    nearestDisplayMode->refresh_rate);
 
-	return nearestDisplayMode;
+	return *nearestDisplayMode;
 }
 #endif
 
@@ -353,7 +405,11 @@ float GetDpiScalingFactor()
 
 	int renderWidth;
 	int renderHeight;
+#ifdef USE_SDL3
+	SDL_GetCurrentRenderOutputSize(renderer, &renderWidth, &renderHeight);
+#else
 	SDL_GetRendererOutputSize(renderer, &renderWidth, &renderHeight);
+#endif
 
 	int windowWidth;
 	int windowHeight;
@@ -399,10 +455,12 @@ void SetVideoModeToPrimary(bool fullscreen, int width, int height)
 
 bool IsFullScreen()
 {
-#ifdef USE_SDL1
-	return (SDL_GetVideoSurface()->flags & SDL_FULLSCREEN) != 0;
-#else
+#ifdef USE_SDL3
+	return (SDL_GetWindowFlags(ghMainWnd) & SDL_WINDOW_FULLSCREEN) != 0;
+#elif !defined(USE_SDL1)
 	return (SDL_GetWindowFlags(ghMainWnd) & (SDL_WINDOW_FULLSCREEN | SDL_WINDOW_FULLSCREEN_DESKTOP)) != 0;
+#else
+	return (SDL_GetVideoSurface()->flags & SDL_FULLSCREEN) != 0;
 #endif
 }
 
@@ -424,7 +482,10 @@ bool SpawnWindow(const char *lpWindowName)
 	}
 #endif
 
-#if SDL_VERSION_ATLEAST(2, 0, 4)
+#ifdef USE_SDL3
+	SDL_SetHint(SDL_HINT_RETURN_KEY_HIDES_IME, "1");
+#endif
+#if SDL_VERSION_ATLEAST(2, 0, 4) && !defined(USE_SDL3)
 	SDL_SetHint(SDL_HINT_IME_INTERNAL_EDITING, "1");
 #endif
 #if SDL_VERSION_ATLEAST(2, 0, 6) && defined(__vita__)
@@ -433,10 +494,12 @@ bool SpawnWindow(const char *lpWindowName)
 #if SDL_VERSION_ATLEAST(2, 0, 10)
 	SDL_SetHint(SDL_HINT_MOUSE_TOUCH_EVENTS, "0");
 #endif
-#if SDL_VERSION_ATLEAST(2, 0, 2)
+#ifdef USE_SDL3
+	SDL_SetHint(SDL_HINT_GAMECONTROLLER_SENSOR_FUSION, "0");
+#elif SDL_VERSION_ATLEAST(2, 0, 2)
 	SDL_SetHint(SDL_HINT_ACCELEROMETER_AS_JOYSTICK, "0");
 #endif
-#if SDL_VERSION_ATLEAST(2, 0, 12)
+#if SDL_VERSION_ATLEAST(2, 0, 12) && !defined(USE_SDL3)
 	SDL_SetHint(SDL_HINT_GAMECONTROLLER_USE_BUTTON_LABELS, "0");
 #endif
 
@@ -445,7 +508,11 @@ bool SpawnWindow(const char *lpWindowName)
 	initFlags |= SDL_INIT_AUDIO;
 #endif
 #ifndef USE_SDL1
+#ifdef USE_SDL3
+	initFlags |= SDL_INIT_GAMEPAD;
+#else
 	initFlags |= SDL_INIT_GAMECONTROLLER;
+#endif
 
 	SDL_SetHint(SDL_HINT_ORIENTATIONS, "LandscapeLeft LandscapeRight");
 #endif
@@ -456,7 +523,11 @@ bool SpawnWindow(const char *lpWindowName)
 
 #ifndef USE_SDL1
 	if (GetOptions().Controller.szMapping[0] != '\0') {
+#ifdef USE_SDL3
+		SDL_AddGamepadMapping(GetOptions().Controller.szMapping);
+#else
 		SDL_GameControllerAddMapping(GetOptions().Controller.szMapping);
+#endif
 	}
 #endif
 
@@ -478,31 +549,52 @@ bool SpawnWindow(const char *lpWindowName)
 	if (*GetOptions().Gameplay.grabInput)
 		SDL_WM_GrabInput(SDL_GRAB_ON);
 	atexit(SDL_VideoQuit); // Without this video mode is not restored after fullscreen.
+#else
+#ifdef USE_SDL3
+	int flags = SDL_WINDOW_HIGH_PIXEL_DENSITY;
 #else
 	int flags = SDL_WINDOW_ALLOW_HIGHDPI;
+#endif
 	if (*GetOptions().Graphics.upscale) {
 		if (*GetOptions().Graphics.fullscreen) {
+#ifdef USE_SDL3
+			flags |= SDL_WINDOW_FULLSCREEN;
+#else
 			flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
+#endif
 		}
 		flags |= SDL_WINDOW_RESIZABLE;
 	} else if (*GetOptions().Graphics.fullscreen) {
 		flags |= SDL_WINDOW_FULLSCREEN;
 	}
 
+#ifdef USE_SDL3
+	ghMainWnd = SDL_CreateWindow(lpWindowName, windowSize.width, windowSize.height, flags);
+#else
 	ghMainWnd = SDL_CreateWindow(lpWindowName, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, windowSize.width, windowSize.height, flags);
+#endif
 
 #if defined(DEVILUTIONX_DISPLAY_PIXELFORMAT)
 	SDL_DisplayMode nearestDisplayMode = GetNearestDisplayMode(windowSize, DEVILUTIONX_DISPLAY_PIXELFORMAT);
-	if (SDL_SetWindowDisplayMode(ghMainWnd, &nearestDisplayMode) != 0) {
-		ErrSdl();
-	}
+#if USE_SDL3
+	if (SDL_SetWindowFullscreenMode(ghMainWnd, &nearestDisplayMode) != 0) ErrSdl();
+#else
+	if (SDL_SetWindowDisplayMode(ghMainWnd, &nearestDisplayMode) != 0) ErrSdl();
+#endif
 #endif
 
-	// Note: https://github.com/libsdl-org/SDL/issues/962
-	// This is a solution to a problem related to SDL mouse grab.
-	// See https://github.com/diasurgical/devilutionX/issues/4251
-	if (ghMainWnd != nullptr)
+// Note: https://github.com/libsdl-org/SDL/issues/962
+// This is a solution to a problem related to SDL mouse grab.
+// See https://github.com/diasurgical/devilutionX/issues/4251
+#ifdef USE_SDL3
+	if (ghMainWnd != nullptr) {
+		SDL_SetWindowMouseGrab(ghMainWnd, *GetOptions().Gameplay.grabInput);
+	}
+#else
+	if (ghMainWnd != nullptr) {
 		SDL_SetWindowGrab(ghMainWnd, *GetOptions().Gameplay.grabInput ? SDL_TRUE : SDL_FALSE);
+	}
+#endif
 
 #endif
 	if (ghMainWnd == nullptr) {
@@ -511,11 +603,21 @@ bool SpawnWindow(const char *lpWindowName)
 
 	int refreshRate = 60;
 #ifndef USE_SDL1
+#ifdef USE_SDL3
+	const SDL_DisplayID displayId = SDL_GetDisplayForWindow(ghMainWnd);
+	if (displayId == 0) ErrSdl();
+	const SDL_DisplayMode *displayMode = SDL_GetCurrentDisplayMode(displayId);
+	if (displayMode == nullptr) ErrSdl();
+	if (displayMode->refresh_rate != 0.F) {
+		refreshRate = static_cast<int>(displayMode->refresh_rate);
+	}
+#else
 	SDL_DisplayMode mode;
 	SDL_GetDisplayMode(0, 0, &mode);
 	if (mode.refresh_rate != 0) {
 		refreshRate = mode.refresh_rate;
 	}
+#endif
 #endif
 	refreshDelay = 1000000 / refreshRate;
 
@@ -539,9 +641,16 @@ void ReinitializeTexture()
 		return;
 
 	auto quality = StrCat(static_cast<int>(*GetOptions().Graphics.scaleQuality));
-	SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, quality.c_str());
 
+#ifdef USE_SDL3
 	texture = SDLWrap::CreateTexture(renderer, DEVILUTIONX_DISPLAY_TEXTURE_FORMAT, SDL_TEXTUREACCESS_STREAMING, gnScreenWidth, gnScreenHeight);
+	if (quality == "nearest") {
+		SDL_SetTextureScaleMode(texture.get(), SDL_SCALEMODE_NEAREST);
+	}
+#else
+	SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, quality.c_str());
+	texture = SDLWrap::CreateTexture(renderer, DEVILUTIONX_DISPLAY_TEXTURE_FORMAT, SDL_TEXTUREACCESS_STREAMING, gnScreenWidth, gnScreenHeight);
+#endif
 }
 
 void ReinitializeIntegerScale()
@@ -550,10 +659,21 @@ void ReinitializeIntegerScale()
 		ResizeWindow();
 		return;
 	}
+	if (renderer == nullptr) return;
 
-	if (renderer != nullptr && SDL_RenderSetIntegerScale(renderer, *GetOptions().Graphics.integerScaling ? SDL_TRUE : SDL_FALSE) < 0) {
+#ifdef USE_SDL3
+	int w, h;
+	SDL_RendererLogicalPresentation mode;
+	if (!SDL_GetRenderLogicalPresentation(renderer, &w, &h, &mode)) ErrSdl();
+	const SDL_RendererLogicalPresentation newMode = *GetOptions().Graphics.integerScaling
+	    ? SDL_LOGICAL_PRESENTATION_INTEGER_SCALE
+	    : SDL_LOGICAL_PRESENTATION_LETTERBOX;
+	if (mode != newMode) SDL_SetRenderLogicalPresentation(renderer, w, h, newMode);
+#else
+	if (SDL_RenderSetIntegerScale(renderer, *GetOptions().Graphics.integerScaling ? SDL_TRUE : SDL_FALSE) < 0) {
 		ErrSdl();
 	}
+#endif
 }
 #endif
 
@@ -573,18 +693,32 @@ void ReinitializeRenderer()
 	if (*GetOptions().Graphics.upscale) {
 		// We don't recreate the renderer, because this can result in a freezing (not refreshing) rendering
 		if (renderer == nullptr) {
+#ifdef USE_SDL3
+			renderer = SDL_CreateRenderer(ghMainWnd, nullptr);
+#else
 			renderer = SDL_CreateRenderer(ghMainWnd, -1, 0);
+#endif
 			if (renderer == nullptr) {
 				ErrSdl();
 			}
 		}
 
-#if SDL_VERSION_ATLEAST(2, 0, 18)
+#ifdef USE_SDL3
+		SDL_SetRenderVSync(renderer, *GetOptions().Graphics.frameRateControl == FrameRateControl::VerticalSync ? 1 : 0);
+#elif SDL_VERSION_ATLEAST(2, 0, 18)
 		SDL_RenderSetVSync(renderer, *GetOptions().Graphics.frameRateControl == FrameRateControl::VerticalSync ? 1 : 0);
 #endif
 
 		ReinitializeTexture();
 
+#ifdef USE_SDL3
+		if (!SDL_SetRenderLogicalPresentation(renderer, gnScreenWidth, gnScreenHeight,
+		        *GetOptions().Graphics.integerScaling
+		            ? SDL_LOGICAL_PRESENTATION_INTEGER_SCALE
+		            : SDL_LOGICAL_PRESENTATION_LETTERBOX)) {
+			ErrSdl();
+		}
+#else
 		if (SDL_RenderSetIntegerScale(renderer, *GetOptions().Graphics.integerScaling ? SDL_TRUE : SDL_FALSE) < 0) {
 			ErrSdl();
 		}
@@ -592,11 +726,16 @@ void ReinitializeRenderer()
 		if (SDL_RenderSetLogicalSize(renderer, gnScreenWidth, gnScreenHeight) <= -1) {
 			ErrSdl();
 		}
+#endif
 
+#ifdef USE_SDL3
+		RendererTextureSurface = SDLSurfaceUniquePtr { SDL_CreateSurface(gnScreenWidth, gnScreenHeight, texture->format) };
+		if (RendererTextureSurface == nullptr) ErrSdl();
+#else
 		Uint32 format;
-		if (SDL_QueryTexture(texture.get(), &format, nullptr, nullptr, nullptr) < 0)
-			ErrSdl();
+		if (SDL_QueryTexture(texture.get(), &format, nullptr, nullptr, nullptr) < 0) ErrSdl();
 		RendererTextureSurface = SDLWrap::CreateRGBSurfaceWithFormat(0, gnScreenWidth, gnScreenHeight, SDL_BITSPERPIXEL(format), format);
+#endif
 	} else {
 		Size windowSize = {};
 		SDL_GetWindowSize(ghMainWnd, &windowSize.width, &windowSize.height);
@@ -623,14 +762,20 @@ void SetFullscreenMode()
 	if (*GetOptions().Graphics.fullscreen && !*GetOptions().Graphics.upscale) {
 		const Size windowSize = GetPreferredWindowSize();
 		const SDL_DisplayMode displayMode = GetNearestDisplayMode(windowSize);
-		if (SDL_SetWindowDisplayMode(ghMainWnd, &displayMode) != 0) {
-			ErrSdl();
-		}
+#ifdef USE_SDL3
+		if (!SDL_SetWindowFullscreenMode(ghMainWnd, &displayMode)) ErrSdl();
+#else
+		if (SDL_SetWindowDisplayMode(ghMainWnd, &displayMode) != 0) ErrSdl();
+#endif
 	}
 
 	Uint32 flags = 0;
 	if (*GetOptions().Graphics.fullscreen) {
+#if USE_SDL3
+		flags = SDL_WINDOW_FULLSCREEN;
+#else
 		flags = *GetOptions().Graphics.upscale ? SDL_WINDOW_FULLSCREEN_DESKTOP : SDL_WINDOW_FULLSCREEN;
+#endif
 	}
 	if (SDL_SetWindowFullscreen(ghMainWnd, flags) != 0) {
 		ErrSdl();
@@ -666,14 +811,21 @@ void ResizeWindow()
 	const bool trueFullscreen = *GetOptions().Graphics.fullscreen && !*GetOptions().Graphics.upscale;
 	if (trueFullscreen) {
 		const SDL_DisplayMode displayMode = GetNearestDisplayMode(windowSize);
-		if (SDL_SetWindowDisplayMode(ghMainWnd, &displayMode) != 0)
-			ErrSdl();
+#ifdef USE_SDL3
+		if (!SDL_SetWindowFullscreenMode(ghMainWnd, &displayMode)) ErrSdl();
+#else
+		if (SDL_SetWindowDisplayMode(ghMainWnd, &displayMode) != 0) ErrSdl();
+#endif
 	}
 
 	// Handle switching between "fake fullscreen" and "true fullscreen" when upscale is toggled
 	const bool upscaleChanged = *GetOptions().Graphics.upscale != (renderer != nullptr);
 	if (upscaleChanged && *GetOptions().Graphics.fullscreen) {
+#ifdef USE_SDL3
+		const Uint32 flags = SDL_WINDOW_FULLSCREEN;
+#else
 		const Uint32 flags = *GetOptions().Graphics.upscale ? SDL_WINDOW_FULLSCREEN_DESKTOP : SDL_WINDOW_FULLSCREEN;
+#endif
 		if (SDL_SetWindowFullscreen(ghMainWnd, flags) != 0)
 			ErrSdl();
 		if (!*GetOptions().Graphics.fullscreen)
@@ -687,7 +839,11 @@ void ResizeWindow()
 	ReinitializeRenderer();
 
 #ifndef USE_SDL1
+#ifdef USE_SDL3
+	SDL_SetWindowResizable(ghMainWnd, renderer != nullptr);
+#else
 	SDL_SetWindowResizable(ghMainWnd, renderer != nullptr ? SDL_TRUE : SDL_FALSE);
+#endif
 	InitializeVirtualGamepad();
 #endif
 
diff --git a/Source/utils/display.h b/Source/utils/display.h
index f0e70b423..68b6a6a07 100644
--- a/Source/utils/display.h
+++ b/Source/utils/display.h
@@ -3,12 +3,19 @@
 #include <cstdint>
 #include <type_traits>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_render.h>
+#include <SDL3/SDL_surface.h>
+#include <SDL3/SDL_video.h>
+#else
 #include <SDL.h>
 #ifdef USE_SDL1
 #include "utils/sdl2_to_1_2_backports.h"
 #else
 #include "utils/sdl2_backports.h"
 #endif
+#endif
 
 #include "utils/attributes.h"
 #include "utils/sdl_ptrs.h"
@@ -62,14 +69,22 @@ void OutputToLogical(T *x, T *y)
 		return;
 
 	float scaleX;
-	SDL_RenderGetScale(renderer, &scaleX, NULL);
+#ifdef USE_SDL3
+	SDL_GetRenderScale(renderer, &scaleX, nullptr);
+#else
+	SDL_RenderGetScale(renderer, &scaleX, nullptr);
+#endif
 	float scaleDpi = GetDpiScalingFactor();
 	float scale = scaleX / scaleDpi;
 	*x = static_cast<T>(*x / scale);
 	*y = static_cast<T>(*y / scale);
 
 	SDL_Rect view;
+#ifdef USE_SDL3
+	SDL_GetRenderViewport(renderer, &view);
+#else
 	SDL_RenderGetViewport(renderer, &view);
+#endif
 	*x -= view.x;
 	*y -= view.y;
 #else
@@ -90,12 +105,20 @@ void LogicalToOutput(T *x, T *y)
 	if (!renderer)
 		return;
 	SDL_Rect view;
+#ifdef USE_SDL3
+	SDL_GetRenderViewport(renderer, &view);
+#else
 	SDL_RenderGetViewport(renderer, &view);
+#endif
 	*x += view.x;
 	*y += view.y;
 
 	float scaleX;
-	SDL_RenderGetScale(renderer, &scaleX, NULL);
+#ifdef USE_SDL3
+	SDL_GetRenderScale(renderer, &scaleX, nullptr);
+#else
+	SDL_RenderGetScale(renderer, &scaleX, nullptr);
+#endif
 	float scaleDpi = GetDpiScalingFactor();
 	float scale = scaleX / scaleDpi;
 	*x = static_cast<T>(*x * scale);
@@ -110,7 +133,13 @@ void LogicalToOutput(T *x, T *y)
 }
 
 #if SDL_VERSION_ATLEAST(2, 0, 0)
-SDL_DisplayMode GetNearestDisplayMode(Size preferredSize, SDL_PixelFormatEnum preferredPixelFormat = SDL_PIXELFORMAT_UNKNOWN);
+SDL_DisplayMode GetNearestDisplayMode(Size preferredSize,
+#ifdef USE_SDL3
+    SDL_PixelFormat preferredPixelFormat = SDL_PIXELFORMAT_UNKNOWN
+#else
+    SDL_PixelFormatEnum preferredPixelFormat = SDL_PIXELFORMAT_UNKNOWN
+#endif
+);
 #endif
 
 } // namespace devilution
diff --git a/Source/utils/png.h b/Source/utils/png.h
index d898c7f73..36edafeba 100644
--- a/Source/utils/png.h
+++ b/Source/utils/png.h
@@ -1,9 +1,15 @@
 #pragma once
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_iostream.h>
+#include <SDL3_image/SDL_image.h>
+#else
 #include <SDL.h>
+#endif
 
 #include "engine/assets.hpp"
 
+#ifndef USE_SDL3
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -26,9 +32,11 @@ inline SDL_Surface *IMG_LoadPNG(const char *file)
 #ifdef __cplusplus
 }
 #endif
+#endif
 
 namespace devilution {
 
+#ifndef USE_SDL3
 inline int InitPNG()
 {
 	return IMG_Init(IMG_INIT_PNG);
@@ -38,12 +46,18 @@ inline void QuitPNG()
 {
 	IMG_Quit();
 }
+#endif
 
 inline SDL_Surface *LoadPNG(const char *file)
 {
-	SDL_RWops *rwops = OpenAssetAsSdlRwOps(file);
+	auto *rwops = OpenAssetAsSdlRwOps(file);
+#ifdef USE_SDL3
+	SDL_Surface *surface = IMG_LoadPNG_IO(rwops);
+	SDL_CloseIO(rwops);
+#else
 	SDL_Surface *surface = IMG_LoadPNG_RW(rwops);
 	SDL_RWclose(rwops);
+#endif
 	return surface;
 }
 
diff --git a/Source/utils/sdl_bilinear_scale.cpp b/Source/utils/sdl_bilinear_scale.cpp
index 9164d7097..ff72166fb 100644
--- a/Source/utils/sdl_bilinear_scale.cpp
+++ b/Source/utils/sdl_bilinear_scale.cpp
@@ -1,8 +1,19 @@
 #include "utils/sdl_bilinear_scale.hpp"
 
+#include <cstddef>
 #include <cstdint>
 #include <memory>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_surface.h>
+#else
+#include <SDL.h>
+#endif
+
+#include "appfat.h"
+
 // Performs bilinear scaling using fixed-width integer math.
 
 namespace devilution {
@@ -148,16 +159,25 @@ void BilinearScale32(SDL_Surface *src, SDL_Surface *dst)
 	}
 }
 
-void BilinearDownscaleByHalf8(const SDL_Surface *src, const Uint8 paletteBlendingTable[256][256], SDL_Surface *dst, uint8_t transparentIndex)
+void BilinearDownscaleByHalf8(SDL_Surface *src, const uint8_t paletteBlendingTable[256][256], SDL_Surface *dst, uint8_t transparentIndex)
 {
+	SDL_Rect srcClipRect, dstClipRect;
+#ifdef USE_SDL3
+	if (!SDL_GetSurfaceClipRect(src, &srcClipRect)) app_fatal(SDL_GetError());
+	if (!SDL_GetSurfaceClipRect(dst, &dstClipRect)) app_fatal(SDL_GetError());
+#else
+	srcClipRect = src->clip_rect;
+	dstClipRect = dst->clip_rect;
+#endif
+
 	const auto *const srcPixelsBegin = static_cast<const uint8_t *>(src->pixels)
-	    + static_cast<size_t>(src->clip_rect.y * src->pitch + src->clip_rect.x);
+	    + static_cast<size_t>((srcClipRect.y * src->pitch) + srcClipRect.x);
 	auto *const dstPixelsBegin = static_cast<uint8_t *>(dst->pixels)
-	    + static_cast<size_t>(dst->clip_rect.y * dst->pitch + dst->clip_rect.x);
-	for (unsigned y = 0, h = static_cast<unsigned>(dst->clip_rect.h); y < h; ++y) {
+	    + static_cast<size_t>((dstClipRect.y * dst->pitch) + dstClipRect.x);
+	for (unsigned y = 0, h = static_cast<unsigned>(dstClipRect.h); y < h; ++y) {
 		const uint8_t *srcPixels = srcPixelsBegin + static_cast<size_t>(2 * y * src->pitch);
 		uint8_t *dstPixels = dstPixelsBegin + static_cast<size_t>(y * dst->pitch);
-		for (unsigned x = 0, w = static_cast<unsigned>(dst->clip_rect.w); x < w; ++x) {
+		for (unsigned x = 0, w = static_cast<unsigned>(dstClipRect.w); x < w; ++x) {
 			uint8_t quad[] = {
 				srcPixels[0],
 				srcPixels[1],
diff --git a/Source/utils/sdl_bilinear_scale.hpp b/Source/utils/sdl_bilinear_scale.hpp
index b35670363..04675e835 100644
--- a/Source/utils/sdl_bilinear_scale.hpp
+++ b/Source/utils/sdl_bilinear_scale.hpp
@@ -2,12 +2,10 @@
 
 #include <cstdint>
 
-#include <SDL_version.h>
-
-#if SDL_VERSION_ATLEAST(2, 0, 0)
-#include <SDL_surface.h>
+#ifdef USE_SDL3
+#include <SDL3/SDL_surface.h>
 #else
-#include <SDL_video.h>
+#include <SDL.h>
 #endif
 
 namespace devilution {
@@ -22,6 +20,6 @@ void BilinearScale32(SDL_Surface *src, SDL_Surface *dst);
  * @brief Streamlined bilinear downscaling using blended transparency table.
  * Requires `src` and `dst` to have the same pixel format (INDEX8).
  */
-void BilinearDownscaleByHalf8(const SDL_Surface *src, const Uint8 paletteBlendingTable[256][256], SDL_Surface *dst, uint8_t transparentIndex);
+void BilinearDownscaleByHalf8(SDL_Surface *src, const uint8_t paletteBlendingTable[256][256], SDL_Surface *dst, uint8_t transparentIndex);
 
 } // namespace devilution
diff --git a/Source/utils/sdl_compat.h b/Source/utils/sdl_compat.h
index 84ee9c0b4..bb42a5260 100644
--- a/Source/utils/sdl_compat.h
+++ b/Source/utils/sdl_compat.h
@@ -1,6 +1,13 @@
 // Compatibility wrappers for SDL 1 & 2.
 #pragma once
+
+#ifdef USE_SDL3
+#include <SDL3/SDL_keyboard.h>
+#include <SDL3/SDL_pixels.h>
+#include <SDL3/SDL_surface.h>
+#else
 #include <SDL.h>
+#endif
 
 #ifndef USE_SDL1
 #define SDLC_KEYSTATE_LEFTCTRL SDL_SCANCODE_LCTRL
@@ -26,49 +33,28 @@
 #define SDLC_KEYSTATE_RIGHT SDLK_RIGHT
 #endif
 
-inline const Uint8 *SDLC_GetKeyState()
-{
-#ifndef USE_SDL1
-	return SDL_GetKeyboardState(NULL);
-#else
-	return SDL_GetKeyState(NULL);
-#endif
-}
-
-inline int SDLC_SetColorKey(SDL_Surface *surface, Uint32 key)
-{
-#ifdef USE_SDL1
-	return SDL_SetColorKey(surface, SDL_SRCCOLORKEY, key);
+#ifdef USE_SDL3
+inline const bool *SDLC_GetKeyState()
 #else
-	return SDL_SetColorKey(surface, SDL_TRUE, key);
+inline const Uint8 *SDLC_GetKeyState()
 #endif
-}
-
-// Copies the colors into the surface's palette.
-inline int SDLC_SetSurfaceColors(SDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors)
 {
-#ifdef USE_SDL1
-	return SDL_SetPalette(surface, SDL_LOGPAL, colors, firstcolor, ncolors) - 1;
+#ifndef USE_SDL1
+	return SDL_GetKeyboardState(nullptr);
 #else
-	return SDL_SetPaletteColors(surface->format->palette, colors, firstcolor, ncolors);
+	return SDL_GetKeyState(nullptr);
 #endif
 }
 
-// Copies the colors into the surface's palette.
-inline int SDLC_SetSurfaceColors(SDL_Surface *surface, SDL_Palette *palette)
-{
-	return SDLC_SetSurfaceColors(surface, palette->colors, 0, palette->ncolors);
-}
-
 // Sets the palette's colors and:
-// SDL2: Points the surface's palette to the given palette if necessary.
+// SDL3 and SDL2: Points the surface's palette to the given palette if necessary.
 // SDL1: Sets the surface's colors.
-inline int SDLC_SetSurfaceAndPaletteColors(SDL_Surface *surface, SDL_Palette *palette, SDL_Color *colors, int firstcolor, int ncolors)
+inline bool SDLC_SetSurfaceAndPaletteColors(SDL_Surface *surface, SDL_Palette *palette, SDL_Color *colors, int firstcolor, int ncolors)
 {
-#ifdef USE_SDL1
+#if defined(USE_SDL1)
 	if (ncolors > (palette->ncolors - firstcolor)) {
 		SDL_SetError("ncolors > (palette->ncolors - firstcolor)");
-		return -1;
+		return false;
 	}
 	if (colors != (palette->colors + firstcolor))
 		SDL_memcpy(palette->colors + firstcolor, colors, ncolors * sizeof(*colors));
@@ -77,16 +63,22 @@ inline int SDLC_SetSurfaceAndPaletteColors(SDL_Surface *surface, SDL_Palette *pa
 	// When the video surface is 8bit, we need to set the output palette as well.
 	SDL_Surface *videoSurface = SDL_GetVideoSurface();
 	SDL_SetColors(videoSurface, colors, firstcolor, ncolors);
-	if (videoSurface == surface) return 0;
+	if (videoSurface == surface) return true;
 #endif
 	// In SDL1, the surface always has its own distinct palette, so we need to
 	// update it as well.
-	return SDL_SetPalette(surface, SDL_LOGPAL, colors, firstcolor, ncolors) - 1;
-#else // !USE_SDL1
+	return SDL_SetPalette(surface, SDL_LOGPAL, colors, firstcolor, ncolors) == 0;
+#elif defined(USE_SDL3)
+	if (!SDL_SetPaletteColors(palette, colors, firstcolor, ncolors)) return false;
+	if (SDL_GetSurfacePalette(surface) != palette) {
+		if (!SDL_SetSurfacePalette(surface, palette)) return false;
+	}
+	return true;
+#else
 	if (SDL_SetPaletteColors(palette, colors, firstcolor, ncolors) < 0)
-		return -1;
+		return false;
 	if (surface->format->palette != palette)
 		return SDL_SetSurfacePalette(surface, palette);
-	return 0;
+	return true;
 #endif
 }
diff --git a/Source/utils/sdl_mutex.h b/Source/utils/sdl_mutex.h
index 4284de78b..4bf4fca81 100644
--- a/Source/utils/sdl_mutex.h
+++ b/Source/utils/sdl_mutex.h
@@ -2,8 +2,13 @@
 
 #include <memory>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_mutex.h>
+#include <SDL3/SDL_version.h>
+#else
 #include <SDL_mutex.h>
 #include <SDL_version.h>
+#endif
 
 #include "appfat.h"
 
@@ -51,35 +56,49 @@ public:
 
 	void lock() noexcept // NOLINT(readability-identifier-naming)
 	{
+#ifdef USE_SDL3
+		SDL_LockMutex(mutex_);
+#else
 		int err = SDL_LockMutex(mutex_);
-		if (err == -1)
-			ErrSdl();
+		if (err == -1) ErrSdl();
+#endif
 	}
 
 #if SDL_VERSION_ATLEAST(2, 0, 0)
-	bool try_lock() noexcept // NOLINT(readability-identifier-naming)
+	[[nodiscard]] bool try_lock() noexcept // NOLINT(readability-identifier-naming)
 	{
-		int err = SDL_TryLockMutex(mutex_);
-		if (err == -1)
-			ErrSdl();
-		return err == 0;
+		const bool ok =
+#ifdef USE_SDL3
+		    SDL_TryLockMutex(mutex_);
+#else
+		    SDL_TryLockMutex(mutex_) == 0;
+#endif
+		return ok;
 	}
 #endif
 
 	void unlock() noexcept // NOLINT(readability-identifier-naming)
 	{
+#ifdef USE_SDL3
+		SDL_UnlockMutex(mutex_);
+#else
 		int err = SDL_UnlockMutex(mutex_);
-		if (err == -1)
-			ErrSdl();
+		if (err == -1) ErrSdl();
+#endif
 	}
 
-	SDL_mutex *get()
-	{
-		return mutex_;
-	}
+#ifdef USE_SDL3
+	SDL_Mutex *get() { return mutex_; }
+#else
+	SDL_mutex *get() { return mutex_; }
+#endif
 
 private:
+#ifdef USE_SDL3
+	SDL_Mutex *mutex_;
+#else
 	SDL_mutex *mutex_;
+#endif
 };
 #endif
 
diff --git a/test/palette_blending_benchmark.cpp b/test/palette_blending_benchmark.cpp
index 0f0f8a521..a570155d7 100644
--- a/test/palette_blending_benchmark.cpp
+++ b/test/palette_blending_benchmark.cpp
@@ -3,7 +3,12 @@
 #include <array>
 #include <cstdint>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_pixels.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <benchmark/benchmark.h>
 
 #include "utils/palette_kd_tree.hpp"
diff --git a/test/palette_blending_test.cpp b/test/palette_blending_test.cpp
index 09bf3e43d..ac0cae7b9 100644
--- a/test/palette_blending_test.cpp
+++ b/test/palette_blending_test.cpp
@@ -4,7 +4,12 @@
 #include <array>
 #include <iostream>
 
+#ifdef USE_SDL3
+#include <SDL3/SDL_pixels.h>
+#else
 #include <SDL.h>
+#endif
+
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>