Emulators that have Game Genie support also allow a near-unlimited number of codes to be entered whereas the actual products have an upper and lower limit, between three and six codes.
Five million units of the original Game Genie products were sold worldwide, and most video game console emulators feature Game Genie code support. All Game Genie devices temporarily modify game data, allowing the player to do things unintended by developers such as, depending on the game, cheating, manipulating various aspects of games, and accessing unused assets and functions.
The first device in the series was released in 1990 for the Nintendo Entertainment System, with subsequent devices released for the Super NES, Game Boy, Genesis, and Game Gear. Game Genie is a line of video game cheat cartridges originally designed by Codemasters, sold by Camerica and Galoob.