Milon's Secret Castle (JP) is a game released for the Nintendo Entertainment System in the 1988. It is a puzzle game created by Hudson Soft and is rated E by the ESRB. It has been ported to the Game Boy and released on Virtual Console.


The protagonist, Milon, dwells in the land of Hudson where people use music to talk with each other. But Milon always asked himself why he is the only one who lacks understanding of people and music. Before leaving for his trip, Milon decides to visit Queen Eliza who lives in Castle Garland (known as "Hudson's Secret Castle" in Japan).

When Milon finally arrives at Castle Garland, the people were being attacked by the Evil Warlord Maharito from the northern region. Maharito robs the innocent people, by stealing all their musical instruments and occupies the Castle Garland. Queen Eliza is held hostage deep inside Castle Garland by Maharito and his demon-companions.

Milon volunteers to fight against the Maharito and his demons and to rescue Queen Eliza and the musical instruments for the people of Hudson. Castle Garland has various rooms and each room is a maze filled with demons, secret passages and doors. But the Castle's Magician tells Milon that Queen Eliza has hidden various tools, instruments and money to help him.


The player starts at the bottom floor of a four-story castle, named Castle Garland, searching the three main stories, the well, two side towers and the very top. Milon's bubbles are both a tool and a weapon; throwing bubbles at soft blocks causes them to demolish and either create additional routes, reveal hidden shops, or expose specific items. The game is considered by several gamers to be extremely hard and frustrating. There aren't any save points, and once a player runs out of HP, the game is over; however, it is possible to continue after obtaining the first crystal.


GameSpot's Frank Provo described the game as easily one of the worst games ever made, with a score of 2/10. Provo criticized the control scheme, saying Milon "runs like his feet are greased, and his jumps are easily interrupted by nearby blocks that are adjacent or directly above him.