This is the movie that makes you realize Greek mythology was always a gangster story, and 1986 Sunrise had the guts to animate it that way. Yasuhiko Yoshikazu came off Gundam, took his own manga, and directed it himself, so every frame carries that linework where faces actually age and armor actually weighs something. The engine isn't the war between Zeus and Poseidon, it's Hades quietly building a child into a knife using his mother's blindness as the lie, and Arion spending the whole film refusing to be the weapon someone else forged. Joe Hisaishi's score treats the gods like weather, huge and indifferent, right up until the point where they turn out to be small, petty, and disappointingly human. It's slept on because it never got a clean release and it doesn't flatter anybody, least of all the Olympians. Watch it for the moment Arion stops looking up at them.
A boy raised in the shadow of gods awakens to a world far more dangerous than he imagined. Arion grows up innocent and sheltered until a stranger tears him from his home, intending to forge him into a living weapon for the escalating war between Zeus and Poseidon. The divine powers circling overhead view him as nothing more than a pawn: Ares hunts him with relentless brutality, Athena calculates his every weakness, and Apollo weaves deception through honeyed words. But Arion refuses to play the role destiny has written for him. Armed with a legendary weapon forged by Prometheus and surrounded by companions who believe in him when the gods do not, he strikes back against the machinations of Olympus itself. Every choice pulls him closer to an impossible truth about his own origins, a secret his mother has guarded at terrible cost. To claim his freedom and uncover who he truly is, Arion must challenge the very foundations of divine authority and risk everything against immortal beings who have never known defeat.