坂口博信
was a cancelled action role-playing game in development by Mistwalker for Xbox 360. Mistwalker founder Hironobu Sakaguchi acted as co-producer and writer, "Drakengard" artist Kimihiko Fujisaka was designing the characters, while composer Nobuo Uematsu was attached to the project. It was co-developed first by Cavia, then from 2007 by Artoon.