Metroid Prime
The "Metroid Prime" series is set between "Metroid" and "Metroid II". In "Metroid Prime," Samus travels to Tallon IV to stop the Space Pirates from exploiting a powerful radioactive substance, Phazon. "Metroid Prime: Hunters" sees Samus respond to a distress call to the Alimbic Cluster, and fights alongside other bounty hunters against a creature named Gorea. In "Metroid Prime 2: Echoes", Samus explores the planet Aether, which has been split into "light" and "dark" dimensions, and battles Dark Samus and the Ing race. In "Metroid Prime 3: Corruption", Samus searches for bounty hunters who have been infected with Phazon, while being slowly corrupted by Phazon herself. "Metroid Prime: Federation Force", the only game in which players do not control Samus, sees Samus mind-controlled by Space Pirates; the Federation Force battles to rescue her and destroy the Space Pirates.