Super Mario Odyssey is a platform video game developed and published by Nintendo for the Nintendo Switch. It is a Super Mario game that follows Mario and Cappy, a spirit that turns into Mario's hat and allows him to possess other characters and objects, as they journey across various worlds to save Princess Peach from his nemesis Bowser, who plans to forcibly marry her. In contrast to the linear gameplay of prior entries, the game returns to the primarily open-ended, exploration-based gameplay featured in Super Mario 64 and Super Mario Sunshine.