Complex sentence: Kratos renounces Ares, becomes a tormented soul, and serves the gods for ten years, eventually becoming the God of War and revealed to be a demigod, until betrayed by his father Zeus.
Split into simpler sentences: Kratos renounces Ares, becomes a tormented soul, and serves the gods for ten years. He eventually kills Ares and becomes the God of War, but is betrayed by his father Zeus.