BZFlag is a 3D, multiplayer, tank battle zone, capture the flag game that pits players against each other in a networked environment. It runs on Windows 95/98/NT/2000, Linux, MacOS 10.x, Irix, Solaris, and others. An OpenGL accelerator is highly recommended, but it is playable with 3D in software.
SuperTux is a side-scrolling platform game. The hero in this game is Tux the Penguin, the game's only reference to Linux. On the journey to rescue Penny, who has been kidnapped by evil Nolok, Tux faces 23 different kinds of bad guys while jumping and running through 101 beautifully-drawn levels. The soundtrack is available on last.fm and similar sites.
You are captain of the cargo ship Chromium B.S.U., responsible for delivering supplies to our troops on the front line. Your ship has a small fleet of robotic fighters which you control from the relative safety of the Chromium vessel. Chromium B.S.U. is a fast paced, arcade-style, top-scrolling shooter. It uses OpenGL for graphics, OpenAL/SDL_mixer for sound effects, GLC/FTGL for text rendering, and glpng/SDL_image for texture loading.
Atanks is a multi-platform Scorched Earth clone similar to the Worms series of games. Annihilate the other tanks to earn money, then spend it on bigger and better shields and weapons to wipe out the opposition. It features a wide array of weapons, AI players, destructible landscape, weather, parachutes, teleports and a wide range of other features.
Blob Wars: Metal Blob Solid is a 2D mission-based platform game. Since their world was invaded by an alien race, the Blobs have faced a lifetime of war. But now they have a chance to win the war once and for all. In Episode I: Metal Blob Solid, you take on the role of a fearless Blob agent, Bob. Bob's mission is to infiltrate the various enemy bases around the Blobs' homeworld and rescue as many POWs as possible. But standing in his way are many vicious enemies, other Blobs who have been assimilated, and the evil alien leader, Galdov.
In Armagetron, you ride a lightcycle around the game grid. You can only make sharp turns of 90 degrees and a wall constantly builds up after you. Make your enemies crash into your wall, but be aware that they are trying to do the same to you. If you are fast enough, you may be able to trap them, but the only way to speed up your lightcycle is to drive close to the dangerous walls. Prepare for exciting strategic preparations followed by action-packed close combat!