diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 33c896e..491ce19 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -33,6 +33,9 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v5
+    - name: Set SDL2 default
+      run: |
+        sed -i 's/WITH_SDL3:=yes/WITH_SDL3:=no/g' Makefile
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v3
       with:
diff --git a/.github/workflows/linux_aarch64.yml b/.github/workflows/linux_aarch64.yml
index e54ab58..70d4c4c 100644
--- a/.github/workflows/linux_aarch64.yml
+++ b/.github/workflows/linux_aarch64.yml
@@ -35,7 +35,7 @@ jobs:
     - name: Build
       run: |
         # Public runners come with 4 CPUs.
-        make -j4
+        make WITH_SDL3=no -j4
     - name: Create testbuild package
       run: |
         # Create release directory tree
diff --git a/.github/workflows/linux_x86_64.yml b/.github/workflows/linux_x86_64.yml
index bf14ee8..3901cc9 100644
--- a/.github/workflows/linux_x86_64.yml
+++ b/.github/workflows/linux_x86_64.yml
@@ -28,8 +28,13 @@ jobs:
     - name: Install build dependencies
       run: |
         sudo apt update
-        sudo apt install libgl1-mesa-dev libsdl2-dev libopenal-dev libcurl4-openssl-dev \
+        sudo apt install libgl1-mesa-dev libopenal-dev libcurl4-openssl-dev \
             libavformat-dev libswscale-dev libvulkan-dev build-essential
+    - name: Build SDL3
+      uses: libsdl-org/setup-sdl@main
+      with:
+        install-linux-dependencies: true
+        version: 3-latest
     - name: Check out repository code
       uses: actions/checkout@v5
     - name: Build
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 3765ef0..ba23f6b 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -28,7 +28,7 @@ jobs:
     - name: Install build dependencies
       run: |
         brew update
-        brew install sdl2 openal-soft make molten-vk
+        brew install sdl3 openal-soft make molten-vk
     - name: Check out repository code
       uses: actions/checkout@v5
     - name: Build
diff --git a/.github/workflows/win32.yml b/.github/workflows/win32.yml
index f2003ba..1373485 100644
--- a/.github/workflows/win32.yml
+++ b/.github/workflows/win32.yml
@@ -38,15 +38,19 @@ jobs:
           unzip
           mingw-w64-${{matrix.env}}-gcc
           mingw-w64-${{matrix.env}}-make
-          mingw-w64-${{matrix.env}}-SDL2
           mingw-w64-${{matrix.env}}-vulkan-headers
+          mingw-w64-${{matrix.env}}-pkgconf
     - name: Check out repository code
       uses: actions/checkout@v5
     - name: Build
       shell: msys2 {0}
       run: |
+        # Download and extract SDL3 devel files.
+        wget -c https://github.com/libsdl-org/SDL/releases/download/release-3.2.24/SDL3-devel-3.2.24-mingw.tar.gz
+        tar xf SDL3-devel-3.2.24-mingw.tar.gz
+        mv SDL3-3.2.24 SDL3
         # Public runners come with 4 CPUs.
-        make -j4
+        PKG_CONFIG_PATH=SDL3/i686-w64-mingw32/lib/pkgconfig make -j4
     - name: Create testbuild package
       shell: msys2 {0}
       run: |
diff --git a/.github/workflows/win64.yml b/.github/workflows/win64.yml
index 1523521..7dd0393 100644
--- a/.github/workflows/win64.yml
+++ b/.github/workflows/win64.yml
@@ -44,9 +44,12 @@ jobs:
     - name: Build
       shell: msys2 {0}
       run: |
-        sed -i 's|WITH_SDL3:=no|WITH_SDL3:=yes|g' Makefile
+        # Download and extract SDL3 devel files.
+        wget -c https://github.com/libsdl-org/SDL/releases/download/release-3.2.24/SDL3-devel-3.2.24-mingw.tar.gz
+        tar xf SDL3-devel-3.2.24-mingw.tar.gz
+        mv SDL3-3.2.24 SDL3
         # Public runners come with 4 CPUs.
-        make -j4
+        PKG_CONFIG_PATH=SDL3/i686-w64-mingw32/lib/pkgconfig make -j4
     - name: Create testbuild package
       shell: msys2 {0}
       run: |
diff --git a/Makefile b/Makefile
index 0a15b62..621a549 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@
 #  - Vulkan renderer lib (ref_vk.so / rev_vk.dll)       #
 #                                                       #
 # Dependencies:                                         #
-# - SDL2                                                #
+# - SDL3                                                #
 # - Vulkan headers                                      #
 #                                                       #
 # Platforms:                                            #
@@ -20,7 +20,7 @@
 # -------------------------
 
 # Builds with SDL 3 instead of SDL 2.
-WITH_SDL3:=no
+WITH_SDL3:=yes
 
 # ----------