Lost Odyssey is a Japanese role-playing video game developed by Mistwalker and Feelplus for the Xbox 360. It was published by Microsoft Game Studios in 2007 in Japan and 2008 in western territories. The story follows Kaim, one of a select group of "immortals" who have lost their memories: while confronting threats generated by the world's approaching magical industrial revolution, he must also face the pain brought by his returning memories. The gameplay features many staples of the genre, such as navigation using a world map, random encounters, and a turn-based battle system.