So this was a video game that I enjoyed immensely, back in the day of the original Playstation. It was developed and published by Squaresoft, back before they became Square Enix (you may know them for a little series called Final Fantasy).
Xenogears is a dark, psychological, science fantasy game in the same vein as Evangelion. A combo based combat system that ranged from fist fights to fist fights with giant robots made for some interesting gameplay, and the story (which included reincarnations, memory loss, and the works of Nietzsche and Freud) was certainly complex enough to hold the attention. And even if the music was nearly identical to that of Chrono Trigger, it was still some of the best of its age.
You can read the plot synopsis as well as I can, but let me just say, this game had one of my favorite villains of all time, and if anyone ever asks you, "Do you desire power?" just say yes. You'll make some good guy very, very sad.