Features:
Game Storyline: When Samus investigates an abandoned Federation ship on a planet named Aether, her ship is incapacitated by a freak electrical aberration in the atmosphere. Crash-landing on the planet's surface, she finds the scene of a slaughter. A group of creatures borne of darkness, known as the Ing Horde, attack her and steal a number of her Power Suit's abilities, leaving her for dead. As she soon comes to realize, the planet has been dimensionally doubled: One exists in darkness, the other in light. The peaceful people of Light Aether, called the Luminoth, are slowly being destroyed by the Ing Horde, and the loss of their generators will mean the permanent eclipse of the planet by Dark Aether. Not only that, but Samus soon finds that something more dangerous than the Ing stalks the planet surface: A dark creature is on the loose, and growing more lethal by the minute.
Characters: Samus, Space Pirates, the Ing Horde, the Luminoth, Federation soldiers.
How to progress through the game: Explore the dual worlds of Dark and Light Aether, battling enemies and gaining power-ups. Every power-up you find will help you access new areas, so study your environment carefully and always remain on guard. In multiplayer, use power-ups like the Grapple Beam and Morph Ball to take on up to three friends in classic death matches.
Special powers/weapons/moves/features: There are many new power-ups and missile combos, including the Dark and Light Beams and many more. Many of the hallmarks of the Metroid series return as well, like the Charge Beam, Missiles, Morph Ball, Boost Ball, Grapple Beam and Scan Visor.