QuakeForge is a source port of Quake and QuakeWorld, the successors to id Software's very popular DOOM series. Its primary development goal is to remain compatible with the original games released by id Software while adding portability and optional extensions to enhance gameplay.

License: free

Additional System Requirements: One or more of: SDL, GGI, Xlib, SVGAlib. For OpenGL support, you need an OpenGL 1.2-compliant implementation. Hardware acceleration is HIGHLY recommended.