Xenosaga

is a science fiction mecha anime produced by Toei Animation. It aired for 12-episodes ran from January to March 2005 on TV Asahi, while it was licensed for release on DVD overseas first by A.D. Vision and later by Funimation Entertainment. The anime is based on the narrative of Xenosaga Episode I, a role-playing game for the PlayStation 2 developed by Monolith Soft and published by Namco.

After the success of the first game, the anime was planned to feature original characters with redrawn artwork without Namco's involvement.

Plot
5000 years have passed since humanity abandoned mother Earth. Beset by the hostile alien Gnosis, mankind is now scrambling to find ways to defeat this threat to their existence. The development of KOS-MOS (a specialized android with amazing capabilities) by Vector engineer Shion Uzuki was one response to the threat. But when their ship is destroyed by the Gnosis, Shion and her companions find themselves thrust into the middle of a battle with no clear sides...