"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 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." Source: Wikipedia, "Doom_3," available under the CC-BY-SA License.