Something has gone wrong at aremote scientific research station on Mars. All research has creased. Communication has failed, and the messages that do get through are less then comforting. It's a level 5 quarantine and the only souls allowed in or out are the Rapid Response Tactical Squad, a squadron armed to the teeth with unprecedented firepower to carry on their mission nothing gets out alive. But a legion of nightmarish creatures of unknown origin lurks behind ever wall and stalks the countless rooms and tunnels.... far more powerful and blood-thirsty than anyone could ever imagine. Doom brings ou all the visceral exitement and starting action that made its game predecessor' a global phenomenon.