Metroid Prime 3: Corruption is an action-adventure game developed by Retro Studios and published by Nintendo for the Wii. The seventh main game in the Metroid series, it was released in North America and Europe in 2007 and in Japan the following year. Corruption is set six months after the events of Metroid Prime 2: Echoes (2004). It follows the bounty hunter Samus Aran, who becomes infected with Phazon by her doppelgänger Dark Samus. Samus works to prevent the Phazon from spreading to other planets while being corrupted by the Phazon. The player controls Samus using the Wii Remote and Nunchuk devices. The remote is used for jumping, aiming, and firing weapons, while the Nunchuk enables actions such as moving Samus and locking onto enemies. Corruption introduces features such as Hypermode, which allows Samus to use more powerful attacks, and the ability to command her gunship. The new control scheme took a year to develop and delayed the game's release several times. The game was first shown to the public at the E3 2005 trade show. Like the previous Prime games, the game received critical acclaim, with reviews praising its gameplay, graphics and music, though some were divided on the controls. More than one million copies were sold in 2007. It was re-released in August 2009 as part of the compilation Metroid Prime: Trilogy. A sequel, Metroid Prime 4, was announced in June 2017 for the Nintendo Switch. Gameplay Metroid Prime 3: Corruption is a first-person action-adventure game. The player controls the protagonist, Samus Aran, using the Wii Remote and Nunchuk devices. The Nunchuk enables the player to perform actions such as moving Samus and locking on to enemies and targets. The Wii Remote allows the player to execute actions such as jumping, aiming, and firing weapons. Corruption is a large, open-ended game that takes place across several planets, each with regions connected by elevators, rail systems and bridges. Each region has rooms separated by doors that can be opened when shot with the correct weapon. The gameplay revolves around solving puzzles to uncover secrets, jumping on platforms, and shooting enemies with the help of a "lock-on" mechanism that allows Samus to move in a circle while staying aimed on an enemy. The "lock-on" mechanism also allows Samus to use the Grapple Beam to attach onto and pull objects, such as enemy shields or certain doors. The game uses a