Adventure Time: The Secret of the Nameless Kingdom is a comedy-fantasy top-down action-adventure game developed by WayForward and published by Little Orbit for the Xbox 360, PlayStation 3, Nintendo 3DS, and PC (via Steam) in North America and Europe on November 18, 2014.
It is the third main video game based on Cartoon Network's Adventure Time animated series (and the last main adaptation by WayForward). Similar to Adventure Time: Explore the Dungeon Because I Don't Know!, Secret of the Nameless Kingdom plays similarly to the 1986 game The Legend of Zelda. It uses 2D sprites in a 3D world.
The PS4 and 3DS versions were later released in Japan (by Bergsala-Lightweight) on December 15, 2016 as Adventure Time: Nameless Oukoku no Sannin no Princess. The digital versions of the game were later removed from their respective storefronts on April 1, 2018.