Book of Mario: Thousands of Doors is an RPG game for the Nintendo Gamecube, in which Mario embarks on a mission to collect the seven Glass Stars find the treasure behind Lehnha, and rescue the Princess of Peaches from the 10-Nauties. The game has intermissions between each section, in which the player assumes the role of God Browser, as well as the Princess of Peaches, who have their own stories that complement the main plot.