This is the first game in the Metroid Series. You play the role of Samus Aran, who travels to the planet SR388 to destroy the space pirates and their leader the mother brain. This game isn't easy, since it's a real maze, and with secret areas with powerups you need to finish the game, finishing this game is a lot harder than any of the other Metroid games. Still, it's fun to see how the series started off, so give it a try.