Aleph One is a 3D first-person shooter game based on the game Marathon 2 by Bungie Software. It is set in a Sci-Fi universe dominated by deviant computer AIs and features a well thought-out plot. Aleph One was originally a MacOS game, but a cross-platform version ("Aleph One/SDL") based on the Simple DirectMedia Layer (SDL) library is currently under development which runs under Unix, BeOS, and Windows.
Doom was the classic 3D shoot'em'up game from id Software. PrBoom is a game engine for playing Doom levels, which runs on both Windows and Linux/Unix systems. It uses the SDL graphics library. PrBoom a very faithful Doom port, with great effort taken to be compatible with as many original Doom levels and demos as possible.
Duke Nukem Forever is part four in a series of PC games featuring Duke Nukem as the hero. Parts one (Duke Nukem) and two (Duke Nukem 2) were sidescrollers/platform games, and part three, Duke Nukem 3D, was an FPS. Duke Nukem 3D became one of the top-selling games of all time, and is a very important part of FPS gaming history; it is one of the few "legendary" titles, together with Quake and Doom. The game is one of the most sophisticated FPS games ever. It features everything the Unreal engine has, but also features things like LOD, skeletal animation, and motion capture, for an optimal playing experience.
Legends is a fast-paced first-person-perspective online multiplayer game. It is designed to take advantage of the beautiful environments available from the Torque engine it is based on, while still offering the breakneck pacing and variety of styles available from such classics as Quake and Tribes. The addition of a jetpack adds a new dimension to mobility.
DeuTex is a wad composer for Doom, Heretic, Hexen and Strife. It can be used to extract the lumps of a wad and save them as individual files. Conversely, it can also build a wad from separate files. When extracting a lump to a file, it does not just copy the raw data, it converts it to an appropriate format (such as PPM for graphics, .au for samples, etc.). When it reads files for inclusion in pwads, it does the necessary reciprocal conversions. In addition, DeuTex has functions such as merging wads, etc.
BFM (Brutal Filemanager) is a mixture between a filemanager and a 3D shoot-'em-up game. In fact, you can't really manage the files yet, just shoot them up. Be carefull when using BFM! Some weapons, such as the shotgun, have spread. So files you didn't really aim at might get ... wasted. Start BFM with the '-s' for safemode and your files shall stay unhurt. It is written in Java and uses the Java3D API.