The game involves you, as Mario's brother Luigi, trying to exorcise a haunted mansion of ghosts by sucking them into a vacuum cleaner. It sounds easier than the previous cinematic attempts by the Ghostbusters and the Catholic Church, but it's not. The complications and cleverness of the game manifest in the use of light and shadow. Many ghosts cannot be seen unless you reveal their shadows or manipulate the objects in a room to make them appear. These imaginative--but never frustrating--puzzles add to the otherwise simplistic process of catching the smaller ghosts by freezing them with a beam of light and sucking them up with your Hoover backpack.

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