is a series of science fiction video games developed by
Monolith Soft and published by
Bandai Namco.
Xenosaga's main story is in the form of a trilogy of
PlayStation 2 video games. There have been three spin-off games and an
anime adaptation. The
Xenosaga series serves as a
spiritual successor to the game
Xenogears, which was released in 1998 for the
PlayStation by
Square. The creator of both
Xenogears and
Xenosaga is
Tetsuya Takahashi, who left Square in 1998 along with Hirohide Sugiura. Using funds from Namco, they started MonolithSoft and the
Xenosaga project.