To coincide with the release of the NES Battletoads game in 1991, a Game Boy game titled Battletoads was released later that year. However, this Game Boy game was not a port of the original NES game, and was instead a unique single-player game with different levels. A second Battletoads game for the Game Boy would later release in 1993, called Battletoads in Ragnarok's World, that was more faithful to the original NES game, porting over seven of its levels albeit still being a single-player game.