Alien Arena 2007 is a free/open-source first-person shooter game based on source code released by id Software. Started by COR Entertainment in 2004, the game combines a 1950s-era sci-fi atmosphere with gameplay similar to the Quake, Doom, and Unreal Tournament series. Alien Arena is primarily an online multiplayer action game, although single player campaigns are also available against bots.

For those of you that still have time off of work from the holidays, there is a new release of the Alien Arena first-person shooter if that piques your interest. Alien Arena 7.33 has been released, which is coming just two months after Alien Arena 7.32.

The Alien Arena development team has released 16 screenshots of the upcoming Alien Arena 2009. This release features “some very significant advances” in the game engine and new arenas, and player models. It’s also mentioned that they are planning to release the new version in June.

Alien Arena is a retro-futuristic, high-tech First Person Shooter, based on the CRX engine, a modification of the extremely successful Quake engine. It's a free, standalone deathmatch game, available for Windows, Linux and FreeBSD.

Alien Arena is a First Person Shooter (FPS) done in somewhat of a Quake or Unreal Tournament style. The entire game is free, open source, and lots of fun to play.

COR Entertainment announces the latest release of it's freeware, open sourced FPS shooter, Alien Arena 2008!

Alien Arena 7.50 (a.k.a. Alien Arena 2011) was released yesterday and it comes with several new notable features regarding the physics engine, as well as two new maps, updated player and skins models, new music for various maps, revamped in-game IRC client, as well as several bug fixes and improvements

Alien Arena is an open source First Person Shooter (FPS) that takes the fun extraterrestrial theme of games like Area 51 and combines it with the hard hitting deathmatch action of great shooters such as Quake and Unreal Tournament.

Alien Arena 2008, the followup to the game Linux.com proclaimed "blows away it's FPS competition" http://www.linux.com/feature/119775 is scheduled to be be released on March 1st, 2008.