KINGDOM HEARTS Uχ Dark Road is an iPhone game by SQUARE ENIX Co. Ltd. It is an offline version of two different games, KINGDOM HEARTS Uχ and KINGDOM HEARTS Dark Road, which can be selected from the title screen. KINGDOM HEARTS Dark Road is focused on the story of Master Xehanort, a key character in the KINGDOM HEARTS series, and his journey to become a seeker of darkness. The game takes place in his world, Scala ad Caelum, where he trains to become a Keyblade Master.

The game features a strategy battle system using a deck of 30 cards, with simple tap and flick controls that allow players to use various abilities to defeat enemies. The game also offers AUTO battle mode for stress-free character growth, and challenging boss battles that unlock new story elements and missions. KINGDOM HEARTS Uχ is the other game included in the app, where players collect "lux" in various Disney worlds and become the main character in their own fairy tale story.