Crazy Kong (クレイジーコング, Kureijī Kongu) is an arcade game developed by Falcon, released in 1981 and similar to Nintendo's Donkey Kong. Although commonly believed to be a bootleg version, it was officially licensed for operation only in Japan when Nintendo couldn't keep up with domestic demand (even though Donkey Kong was still released there), and is based on different hardware. It retains all the gameplay elements of Donkey Kong, but its graphics were redrawn and re-colorized. Falcon breached their contract by exporting the cabinets overseas, leading Nintendo to revoke the license in January 1982. Like the original game, Crazy Kong had bootleg versions under such titles as Congorilla, Big Kong, Donkey King and Monkey Donkey.