Castle of Illusion Starring Mickey Mouse is a 2.5D platform game developed by Sega Studios Australia and published by Sega. The game is a remake of the original 1990 Sega Genesis/Sega Mega Drive video game of the same name, which was the first title in the Illusion series of Mickey Mouse video games. The game was released on PlayStation 3, Windows, and Xbox 360, in September 2013, and later for iOS, Windows Phone, Android, and OS X.

Following the same style of gameplay as the original Mega Drive/Genesis title, presented in high-definition 3D graphics, the game is largely played as a side-scrolling platformer like its predecessor, although some sections allow Mickey Mouse to move in multiple directions, such as puzzle segments. Mickey's main offensive ability is his bounce attack, which he can use to bounce on enemies and reach higher areas. He can also collect projectiles which he can throw at long distance enemies. Levels are re-envisioned versions of the original game's levels now separated into three acts, featuring new layouts, puzzles and enemies, as well as enhanced boss fights. The castle itself, which was merely a transition in the original game, can now be fully explored, with new areas opened up by collecting numerous gems littered around each level. Throughout the game, players can find playing cards and chilli peppers that can be used to unlock various outfits for Mickey.