is a role-playing video game developed by Monolith Soft and published by Namco for the PlayStation 2 and the first title in the Xenosaga series. Der Wille zur Macht, "The Will to Power", is a reference to Friedrich Nietzsche's posthumous collection of notes and unused aphorisms, which was intended to become his magnum opus. While supplies lasted, players who pre-ordered Episode I received a limited-edition artbook featuring original art from the game.