GLOBE_3D is a real-time 3D engine. It features unconditionally portable sources (one set of sources for all platforms), real-time rendering (fast with a 3D hardware-accelerated graphics card), full eye movements and rotations, display of combinations of colors, materials, and textures, transparency, multiple area rendering with the portal technique (e.g. for inner scenes), collision detection, binary space partition (BSP), input-output of 3D objects or groups of objects linked to each other by portals, easy management of resources like textures (.bmp and .tga), BSP trees, and objects stored in .zip files, screenshots (.bmp) and video captures (.avi), multi-view support, and vectorized geometry support.
Q3utX Master Browser is an efficient Urban Terror game servers browser. It interrogates a "Master Browser" and retrieves all servers notified, then shows all info about game servers through an Ajax loader. It shows the server game name and type, IP address and port, server engine, current map name, number of users, and current players. It can filter based on game type.
The Castle is a first-person shooter game in a dark fantasy setting. Your main weapon is a sword, so the fight is mostly short-range. Three main levels are included, packed with creatures, items, and sounds. A couple of bonus levels are also available, like the classic DOOM E1M1 level reimplemented in VRML. The game engine is based on VRML, OpenGL, OpenAL, and all shadows are done by the shadow volumes approach.
Sauerbraten (a.k.a. Cube 2) is a free multiplayer/single player first person shooter, built as a major redesign of the Cube FPS. Much like the original Cube, the aim of this game is not necessarily to produce the most features and eye candy possible, but rather to allow map/geometry editing to be done dynamically in-game, to create fun gameplay and an elegant engine.
Crystal Core is a FPS quest-based game written with Crystal Space and Crystal Entity Layer. The game is based on a science fiction story. The player and his or her companions crash on an alien planet where they discover that the original intelligent inhabitants are now extinct due to an invasion of semi- primitive aliens from a distant planet. Your goal is either to destroy all aliens or escape the planet alive. To accomplish these goals you have to use alien technology and try to interface it with the broken ship that you arrived with.
Excalibur: Morgana's Revenge (EMR) is a first-person shooter game with an epic and in-depth story line. The player travels through time in the Jurassic period, Camelot period, and into the future to chase down Morgana. Using the Aleph One engine, EMR creates an amazing new world, making it an entirely fun and unique gaming experience.