Adventure Time: The Secret of the Nameless Kingdom is a top-down adventure video game developed by WayForward Technologies with the help of Pendleton Wardunder license from Cartoon Network Interactive. It was published by Little Orbit for Microsoft Windows, PlayStation 3, PlayStation Vita, Xbox 360 and Nintendo 3DS. This is the third game based on the animated television series Adventure Time after Hey Ice King! Why'd You Steal Our Garbage?!! and Explore the Dungeon Because I Don't Know!, and the first from American publisher Little Orbit. The game was first announced on May 8, 2014 and was released on November 18, 2014. The game was released in Japan on December 15, 2016.
The game's plot takes Finn and Jake to discover the secrets through uncharted territories within the Land of Ooo. The game features a top-down perspective adventure game with puzzle elements, similarly to Explore the Dungeon Because I Don't Know!.