Alien Arena 2008 is a free standalone deathmatch game based on source code released by id Software. Begun 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 focuses mainly on online multiplayer action, although it does contain single player campaigns against bots. Alien Arena has been released for Microsoft Windows, Linux and FreeBSD. Alien Arena has been free-to-play since its inception, and there are currently no plans to change it to pay-to-play. Note: this port only contains the data needed to run Alien Arena, shared by the Linux and native ports of the game engine. To play Alien Arena you have to install one of "games/alienarena" or "games/linux-alienarena".