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Nexuiz is a fast-paced, chaotic, and intense multiplayer first-person shooter game, focused on providing basic, old style deathmatch. It is extremely modder-friendly. Nexuiz is built on the power of the Darkplaces engine, which is a heavily modified version of the original Quake. Darkplaces features ... [More]
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 XP/Vista/7, Linux, Mac OS X 10.6+, and others. An OpenGL accelerator is highly recommended.
Sauerbraten (a.k.a. Cube 2) is a free multiplayer/singleplayer first person shooter, built as a major redesign of the Cube FPS.
UFO: Alien Invasion is a strategy game featuring tactical combat against hostile alien forces which are about to infiltrate earth at this very moment. You are in command of a small special unit which has been founded to face the alien strike force. To be successful on the long run, you will also ... [More]
Second Life is a 3-D virtual world entirely built and owned by its residents. Since opening to the public in 2003, it has grown explosively and today is inhabited by a total of 6,642,422 people from around the globe. Linden Lab is making the source code for the Second Life Viewer available to ... [More]
Warzone 2100 was one of the first 3D RTS games ever. It was released commercially by Pumpkin Studies in 1999, and released in 2004 under the GPL. The Warzone Project wishes to make Warzone 2100 one of top free software games available.
Tremulous is a free, open source game that blends a team based FPS with elements of an RTS. Players can choose from 2 unique races, aliens and humans. Players on both teams are able to build working structures in-game like an RTS. These structures provide many functions, the most important being ... [More]
OpenArena is an open-source content package for Quake III Arena licensed under the GPL, effectively creating a free stand-alone game. You do not need Quake III Arena to play this game. Bots were added starting in 0.6.0. They will spout taunts and everything! Concepts would be loose, so ... [More]
Spring is a versatile 3D RTS game engine. Using extensively Lua for scripting game-specific code to make nearly every aspect of the engine customizable, from GUI, to unit AI, to pathfinding.
Scorched3D is a cross-platform 3D remake of the popular 2D artillery game Scorched Earth. Scorched3D can be played against the computer, other players, and remotely across the Internet or LAN.