Mr. Do! vs Unicorns

Mr. Do! vs Unicorns (ミスター・ドゥ VS ユニコーンズ) is an action game, originally developed and published by Universal Lease for the Arcades in 1983. It was released outside Japan as Mr. Do's Castle. Sony made a port of the game for the MSX personal computers in 1984, only in Japan.

The MSX version of Mr. Do! vs Unicorns received a port to the Sega Master System on South Korea, being exclusive to certain multi-carts.