Adapted from the cartoon, the game is a dungeon crawler. It includes voice acting from major characters and four-player cooperative multiplayer.

Princess Bubblegum summons Finn and Jake to investigate a rash of thefts and kidnappings that have plagued the Candy Kingdom. She thinks the cause lies within her Secret Royal Dungeon, where only the nastiest monsters and criminals are locked up. If they’ve found a way to escape, the Land of Ooo will be in danger!

The game is a top-down, isometric hack and slash dungeon crawler, similar to games in the Diablo franchise. Players can collect treasure while in the dungeon that they can later use to upgrade the stats of the various playable characters, interact with other characters, and purchase goods from the game's ubiquitous item vendor.