Halo 3 - Xbox Mooch

The Covenant control Earth. The Flood is unleashed. With the fate of the galaxy hanging in the balance, Master Chief is the only one that can save the human race. The entire story arc has led up to this moment. Master Chief, the last of his kind, is a warrior born for combat, bred for war. and humanity's only hope.

With his AI companion Cortana in the grip of the Flood's intelligent embodiment, Gravemind, Master Chief and his allies are vastly outnumbered. But the stakes are too high to do anything but face them head on.

In Halo 3, the third installment of this amazing epic, the war has come to a climax -- the Flood continue to grow in numbers and strength, the armies of Earth are scattered and decimated, and the Covenant threaten to activate the Halo, effectively destroying all life in the galaxy. Master Chief's mission: to stop the Covenant, destroy the impending Flood threat and ultimately save mankind.