Milon's Secret Castle, known in Japan as Meikyū Kumikyoku: Milon no Daibōken (迷宮組曲 ミロンの大冒険, lit. "The Maze Suite: Milon's Great Adventure"), is a 1986 action-adventure game released by Hudson Soft for the Nintendo Famicom (Japan) on November 13, 1986, the Nintendo Entertainment System (North America) in September 1988.

Milon's Secret Castle, known in Japan as Meikyū Kumikyoku: Milon no Daibōken (迷宮組曲 ミロンの大冒険, lit. "The Maze Suite: Milon's Great Adventure"), is a 1986 action-adventure game released by Hudson Soft for the Nintendo Famicom (Japan) on November 13, 1986, the Nintendo Entertainment System (North America) in September 1988.