Metroid: Lambda Squad is a game that takes place ten years after the events of Metroid Fusion. This game doesn't revolve around Samus Aran, but rather a new generation of heroes destined to replace Samus as protectors of the galaxy, called Lambda Squad. The story revolves around six youths, including Richard the leader and rifleman, Joseph the heavy-artillery man, Jenny the sniper, Mariana the scout, Billy the demolition-expert, and Alexis the medic, as they are sent to the Planet Doleous to stop Samus Aran and her army of space pirates from unleashing Metroid Supreme. It is the first in the Metroid series to not utilize Samus Aran as the protagonist.