 The story of Corruption is set six months after the events of Metroid Prime 2: Echoes, and follows bounty hunter Samus Aran as she assists the Galactic Federation in its fight against the Space Pirates. While fending off a Space Pirate assault, Samus and her fellow bounty hunters are attacked by her doppelgänger, Dark Samus, who incapacitates them with a mutagenic material called Phazon. After losing contact with the other hunters, the Federation sends Samus on a mission to determine what happened to them. During the course of the game, Samus works to prevent the Phazon from spreading from planet to planet while being slowly corrupted by the Phazon herself.
