Metroid follows the adventures of bounty hunter Samus Aran, who battles the villainous Space Pirates. The pirates threaten the Galactic Federation with their attempts to harness biological weapons such as the parasitic Metroid creatures and the hazardous Phazon material.
Samus was raised by the Chozo, an avian race, after her parents were killed by Space Pirates. She serves in the military of the Galactic Federation before departing and beginning work as a bounty hunter, while facing the forces of Ridley and Mother Brain.
