『アドベンチャー・タイム：名もなき王国の秘密』 (Adventure Time: The Secret of the Nameless Kingdom) is an action-adventure game developed by WayForward Technologies and published by Little Orbit for the Nintendo 3DS. It is based on the Cartoon Network TV series Adventure Time. The game follows the story of Finn and Jake, two best friends who embark on a quest to save the Nameless Kingdom from a mysterious force. Players take control of Finn and Jake as they explore the kingdom, solve puzzles, and battle enemies in order to save the kingdom and its inhabitants. Along the way, players will come across a variety of characters from the show, including Princess Bubblegum, Marceline, Lumpy Space Princess, and more. The game features a variety of environments, including forests, deserts, and underground dungeons. Players will also have the opportunity to collect power-ups and items that can be used to upgrade Finn and Jake's abilities. Adventure Time: The Secret of the Nameless Kingdom is an exciting and fun game that will please fans of the show.