The Game Boy Color version is a role-playing game with turn-based combat. The player controls Harry, starting from when Hagrid brings him to Diagon Alley. It strictly follows the story of the books, with all the scenes from that point on in the book being playable, except for the addition of bands of monsters such as rats, bats, and spiders roaming most of the locations. The spells are used for combat, rather than interacting with the environment. In addition, card combinations of Famous Witches and Wizards Collector's Cards can be used to produce powerful magical effects. These cards can be found all over the freely explorable Hogwarts.