A massive demonic invasion has overwhelmed the UAC’s Mars research facility leaving only chaos and horror in its wake. As one of only a few survivors, you struggle with shock and fear as you fight your way to Hell and back in an epic clash against pure evil. Battle alone or team up with a friend and fight your way through the horror in the exclusive two-player co-op mode, or test your nerves against other space marines in intense multiplayer action over Xbox Live. Built on id’s revolutionary new 3D graphics engine, DOOM 3 draws you into the most frightening and gripping 3D gaming experience ever created.