The third game in the series based on the anime adaptation of Yoshiki Tanaka's Legend of the Galactic Heroes science fiction novels. The novels (and the games) are set in a futuristic world, where humanity has conquered the entire Milky Way and split into two powerful warring states, each encompassing different systems and planets: the Galactic Empire (modeled after Bismarck's 19th century Prussia), and the democratic Free Planets Alliance.