Banjo-Tooie is a platform video game and the second game in the Banjo-Kazooie series, and the sequel to Banjo-Kazooie. The game follows the returning protagonists Banjo and Kazooie as they attempt to stop the plans of the witch Gruntilda and two of her sisters, who intend to vaporise the inhabitants of the game's island setting. The game features worlds significantly larger than those of its predecessor, requiring the player to complete challenges such as solving puzzles, jumping over obstacles, collecting items, and defeating opponents.