Xenogears (1998)
Xenogears is a video game about a century-long war between two mysterious organizations. One of the organizations has access to ancient technology in the form of giant combat robots called Gears, and when one of these weapons is stolen by Fei and his allies, they become pursued by multiple groups including military governments, royal pirates, spies, and even their own emperor. It's up to Fei and his friends to use these powerful machines to save themselves from certain doom as they unravel the mysteries behind their pasts.