The Mysterious Murasame Castle (謎の村雨城 , Nazo no Murasame Jō) is an action-adventure game developed and published by Nintendo, which released in Japan for the Family Computer Disk System (FDS) on April 14, 1986. The game was one of the early games released for the system, and the second original game after The Legend of Zelda. The game was released outside Japan for the first time on the Nintendo 3DS Virtual Console in Europe and Australia in May 2014 and in North America in August 2014.
The player takes on the role of the main protagonist Takamaru. The objective is to race through Murasame Castle and the four neighboring castles, obtain the four gems from the castle lords and defeat the main antagonist Murasame. The player moves from different directions in a top-down view with no side-scrolling. The game has only a limited number of power-ups, forcing players to rely on their own action skills more than anything else.
The game world has scrolls scattered throughout the castles for Takamaru to collect, and special raccoon suits may reveal power-ups. Players are given a certain number of lives, and may gain additional lives by rescuing the castles' princesses and playing through bonus rounds after completing the first half of each level. One life is lost when Takamaru's health gauge runs out or he runs out of time. When all lives are lost at any point in the game, the game over screen will appear, in which the player can continue the game or save their progress.