Which civilization's mythology is most prominent in Assassin's Creed Odyssey?

Greek mythology is the mythology most prominent in Assassin's Creed Odyssey.

Odyssey is set in ancient Greece during the Peloponnesian War, beginning in 431 BC. Its world includes locations, stories, creatures, and legendary figures drawn from Greek myth, although these elements are presented through the series' fictional historical framework rather than as a literal retelling of ancient religious belief.

The game features encounters involving figures and creatures such as Medusa, the Minotaur, the Cyclops, and the Sphinx. These encounters are optional or connected to particular quest lines, so the main historical conflict remains the war between Athens and Sparta.

Greek mythology can be confused with the mythological focus of other games in the franchise. Assassin's Creed Origins emphasizes ancient Egyptian culture and beliefs, while Assassin's Creed Valhalla draws heavily on Norse mythology. Odyssey is specifically the entry centered on ancient Greek settings, legends, and philosophical traditions.