Doom 3 is a 2004 survival horror first-person shooter video game developed by id Software and published by Activision. Doom 3 was originally released for Microsoft Windows on August 3 2004 adapted for Linux later that year and ported by Aspyr Media for Mac OS X in 2005. Developer Vicarious Visions ported the game to the Xbox releasing it worldwide on April 4 2005. Doom 3 is set on Mars in 2145 where a military-industrial conglomerate has set up a scientific research facility into fields such as teleportation biological research and advanced weapons design. The teleportation experiments open a gateway to Hell resulting in a catastrophic invasion of the Mars base by demons. The player controls a space marine who fights through the base to stop the demons attacking Mars and reaching Earth.