A massive demonic invasion has overwhelmed the --- RECORDSEPARATOR --- Union Aerospace Corporation's (UAC) Mars Research --- RECORDSEPARATOR --- Facility leaving only chaos and horror in its wake. --- RECORDSEPARATOR --- As one of only a few survivors, you struggle with --- RECORDSEPARATOR --- shock and fear as you fight your way to hell and --- RECORDSEPARATOR --- back, in an epic clash against pure evil. Built on ID's --- RECORDSEPARATOR --- revolutionary new 3D graphics engine Doom 3 draws --- RECORDSEPARATOR --- you into the most frightening and gripping 3D --- RECORDSEPARATOR --- gaming experience ever created.