Xenogears is an intelligently told science fiction JRPG that deals with different religious practices particularly Gnostic spirituality. The plot relies heavily on the philosophies of Friedrich Nietzsche, Sigmund Freud and Carl Jung. Psychological issues such as dissociative identity disorder also play a major role in the game's plot. If this makes the game sound complex and way ahead of its time back in 1998, it's because it was.
The intro here is a stunning mix of CGI and anime which gives you a small but intriguing taste of what is to come in the journey ahead in this sci fi universe.
The Xeno name lives on in Monolith Soft's current Nintendo series Xenoblade and the Xenosaga trilogy prior to that on Playstation 2.