A massive demonic invasion has overwhelmed the Union Aerospace Corporations' (UAC) 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. Built on a revolutionary new 3D graphics engine, Doom III draws you into the most frightening and gripping 3D gaming experience ever created. Dripping with atmosphere and changing the look of 3D games forever, Doom III features realistic physics, 6-channel surround-sound, and real-time dynamic lightingand shadows that create and environment of ever-changing fear and uncertainty. Compete in vicious multiplayer action where light, shadows, and a totally dynamic world can be used to your advantage or peril.