Built on id's revolutionary new 3D graphics engine, DOOM 3 draws players into the most terrifying and riveting 3D gaming experience ever created. id Software's terrifying battle with the forces of Hell. 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, players must struggle with schock, fear, and an all-out assault on their senses as they fight their way to Hell and back, in an epic class against pure evil.