Super Metroid
Super Metroid opens with a narrative by bounty hunter Samus Aran. Samus describes how a Metroid larva hatched from an egg and immediately imprinted upon her, believing her to be its mother. She brought the larva to Ceres Space Colony, where scientists believed that they could harness its power. Just after she left the colony, she received a distress call and returned to find the scientists dead and the larva stolen by Ridley—the leader of the Space Pirates. Samus escapes from the space colony when its self-destruct sequence is activated, and follows Ridley to the planet Zebes. There, she searches for the stolen larva in a network of caves, and finds that the Space Pirates rebuilt and expanded their base on Zebes.
Along the way, Samus defeats four of the Space Pirate bosses, including Kraid and Ridley, and arrives in Tourian—the heart of the Space Pirate base. There, she encounters the Metroid larva, which has now grown to an enormous size. It attacks Samus and nearly drains all of her energy before it realizes who she is, and then departs. Samus recharges her energy and confronts Mother Brain, the biomechanical creature that controls the base's systems and all the enemy forces on Zebes. Mother Brain nearly kills Samus, but is then attacked by the Metroid larva, which drains it of its energy and transfers it back to Samus. Mother Brain recovers and destroys the Metroid in retaliation, but is in turn defeated by Samus with the Hyper Beam—an extremely powerful weapon created from the energy given to her by the Metroid. Afterward, a planetary self-destruct sequence begins, which Samus narrowly escapes. If the player rescues the Dachora and the Etecoons—the creatures Samus encountered earlier in the game—during the escape, they are shown leaving the planet in the distance.
revenge, flashback