Halo 3 is the third game in the Halo Trilogy and the thrilling conclusion to the events begun in Halo: Combat Evolved. Master Chief returns to finish the fight, bringing the epic conflict between the Covenant, the Flood, and the entire human race to a dramatic, pulse-pounding climax. The Covenant occupation of Earth has uncovered a massive and ancient object beneath the African sands - an object whose secrets have yet to be revealed. Earth's forces are battered and beaten. The Master Chief's AI companion Cortana is still trapped in the clutches of the Gravemind - a horrifying Flood intelligence, and a civil war is raging in the heart of the Covenant. It's all been building to this -- a desperate, final war that leads to a soul-shattering climax of epic proportions. Take control of Master Chief to defeat the Covenant and destroy the Flood to prevent the annihilation of the human race.