Why should you pay hundred of dollars for expensive PC games when you can have all the fun with these free Linux games? These free Linux games are open source and you can easily and legally download from the sites mentioned below. Some of these games also have their windows ports available too so you can play them on your Windows PC as well.
RACER:The Real Deal
Racer is a free car simulation game, It is using real car physics to get a realistic feeling. Cars, tracks, scenes and such can be created with relative simplicity in mind (compared to other driving simulations). The 3D and other file formats are, or should be, documented. Editors and support programs are also available to get a very flexible and expandable simulator. It uses OpenGL for rendering.
It attempts to do well at the physics section, trying to create life-like cars to emphasize car control and doesn’t cut back on realism in the interest of fun. If you’ve played Grand Prix Legends from Papyrus, you’ll know what I’m talking about.
Cube 2: Sauerbraten
Free & Open Source… single and multi player 1st person shooter game with some satisfying fast old school game play. A large variety of game play modes from classic SP to fast one on one Multi player and objective based team play.
The engine, though designed for simplicity and elegance as opposed to feature & eye candy checklists, still competes nicely.