Open Source Video Games have come a long way in the last few years. This series of articles looks at the current state of games in the Free or Open Source World.
Free Quake: Open Source Gamer's Guide to Free Games
Part 1 focuses on Adaptations and Modifications of Id's GPL'd Quake Engines.
A popular way for games to become FLOSS is by releasing the source code after a few years of sales and several sequels have come out. Our first set of games come under this heading. All of the free games listed below are available for Windows and Linux, and a few are even Mac compatible.