Yakuman is a Game Boy video game released exclusively in in Japan in 1989. It was one of the first ever Game Boy games to be released, and was later re-released as a Nintendo Power video game years later. The game is based off of Mahjong, and is named after what the winning hand in Mahjong is called. If a player found someone else who also had the game, then the two could connect and play multiplayer. If not, then the player could always play against the computer opponents.
