Set in ancient Greece during the Peloponnesian War, Assassin's Creed Odyssey follows a mercenary known as the Eagle Bearer, either Kassandra or Alexios, as they navigate a world torn between Sparta and Athens. Born into a Spartan family but cast out as a child, the hero grows up to become a skilled warrior seeking answers about their mysterious lineage. Their journey unfolds across a vast open world filled with political intrigue, mythological encounters, and personal choices that shape the narrative. Along the way, they uncover secrets tied to an ancient precursor civilization and confront a powerful secret organization manipulating the Greek world. The story blends historical events with legend, introducing creatures and artifacts from mythology. As the protagonist forms alliances and battles enemies, they also search for their lost family, making the journey deeply personal. Player decisions influence relationships, quests, and ultimately the ending of the story. The game weaves action, exploration, and role-playing elements into an epic tale of destiny, identity, and freedom.