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),[1] with later versions for the Super NES, Game Boy, Sega Genesis, and Game Gear.