Doom 3 is a science fiction horror video game developed by id Software and published by Activision. An example of the first-person shooter genre, Doom 3 was first released for Microsoft Windows on August 3, 2004. The game was later adapted for Linux, as well as being ported by Aspyr Media for Mac OS X. Developer Vicarious Visions ported the game to the Xbox console, releasing it on April 3, 2005. British developers Splash Damage also assisted in design for the multiplayer elements of the game.
The game is a reboot of the Doom franchise, disregarding the storylines of the previous Doom video games. Doom 3 is set in 2145 on Mars, where a military-industrial conglomerate has set up a scientific research facility to develop fields such as teleportation, biological research and advanced weapons design. However, the teleportation experiments inadvertently open a gateway to Hell, resulting in a catastrophic invasion by demons. The player, an anonymous space marine, must fight through the base and find a way to stop demons from Hell attacking Earth. Doom 3 features an award-winning game engine, id Tech 4, which has since been licensed out to other developers.