Game Genie

The Game Genie was a line of video game accessories that allowed players to alter code transmitted between game cartridges and a video game console, known informally as a cheat cartridge. Developed by Codemasters and distributed by Galoob in the U.S. and Camerica in Canada, it debuted in 1990 for the Nintendo Entertainment System (NES), with later versions for the Super NES, Game Boy, Sega Genesis, and Game Gear.