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

Source code and build instructions for the bundled Quake II engines:
https://softwarerenderer.com/assets/QuakeII-engine-source-2026.10.22-56d3f.zip

Download page: https://softwarerenderer.com/download/
