Have you ever wondered why there are so many free Quake engines but not a free Quake? Well, OpenQuartz will try to fill this gap. Open Quartz is a project to supply GPL artwork to create a fully GPL game based around the GPL Quake sourcecode. The pak0 module contains content (maps, models, graphics and sounds) and Quake-C code which controls the behavior and rules of the game. There is also a playable version available that has bot support. Anyone who ever wanted to create his own First-Person-Shooter can use OpenQuartz as a base.

License: free

Additional System Requirements: LibJpeg (optional)