Amoebax is a cute and addictive action-puzzle game where the objective is to beat your opponents in a battle by filling up their grid up to the top with garbage. Amoebax features a training mode for a single player, a normal mode for one player against the computer, and a tournament mode for one or two players.
Atomic Cannon is an artillery duel game with 100 weapons of mass destruction and 25 deformable scenic landscapes to wage war on. Additional features include death match and round based game modes, multi-player mode with up to 16 players, real time smoke trails, weather effects, real physics, and five music tracks. Some weapons have radioactive effects that harm your opponents over time. Other weapons create landmasses you can use to your tactical advantage to hide behind as cover.
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.