Custom Quake II engine: copyright (C) 1997-2001 id Software, Inc.
GNU GPL version 2 or (at your option) any later version. See COPYING.txt.

Engine/x64 contains the current 64-bit engine and modules.
Engine/x86 contains the current 32-bit engine and modules.
Source: custom-source.zip in the companion QuakeII-engine-source archive.
Build: build\vs2026\build.bat Release x64 (or Release Win32)
Output: x64\Release (or Release)

Engine/quake2-custom.exe is the retained 32-bit engine for original SGL.
Source: legacy-custom-source.zip in the companion archive.
Build: msbuild build\vs2026\quake2.vcxproj /p:Configuration=Release /p:Platform=Win32 /m
Output: Release\quake2.exe

original-source.zip covers the separate original Engine/quake2.exe fallback.
No commercial game data is included.
