Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Xenosaga series is a series of science fiction role-playing video games developed by Monolith Soft and published by Namco Bandai on the PlayStation 2. The series began with the 2002 release of Episode I: Der Wille zur Macht, which was followed in 2004 by Episode II: Jenseits von Gut und Böse and in 2006 by Episode III: Also sprach Zarathustra. The music of the Xenosaga series includes the soundtracks to all three chapters, as well as the music for its spin-off media. These include Xenosaga Freaks, a set of minigames set between the first two chapters, Xenosaga I & II, a Nintendo DS remake of the first two chapters, and Xenosaga: The Animation, an anime series covering the events of the first game. Episode I was composed by Yasunori Mitsuda, Episode II was split between Yuki Kajiura and Shinji Hosoe, and Episode III was composed by Kajiura alone. Xenosaga Freaks reused some of the music of Episode I by Mitsuda while also including new work by Satoru Kousaki and Hiroshi Ohkubo, while Xenosaga I & II and Xenosaga: The Animation used new pieces composed by Kousuke Yamashita.