Metroid Fusion is a 2002 action-adventure game developed by Nintendo for the Game Boy Advance. It follows the character Samus Aran, a bounty hunter, as she investigates a research facility on the planet SR388. After being infected by a parasitic organism called the X Parasite, Samus undergoes a procedure that enhances her abilities but also leads to the emergence of a dangerous clone known as SA-X. In the game, players navigate through the facility, battling enemies and solving puzzles. The gameplay combines exploration with platforming elements, and players can acquire new abilities and upgrades for Samus's suit. The story deepens the Metroid series lore, focusing on themes of isolation and survival.