In which ancient civilization is most of Assassin’s Creed Odyssey set?

Most of Assassin’s Creed Odyssey is set in Ancient Greece.

The game takes place during the Peloponnesian War, a conflict between Athens and Sparta that began in 431 BCE. Its large open world includes mainland Greece and many Aegean islands, allowing players to travel by land and sea.

Players choose either Kassandra or Alexios as the protagonist, although the game’s canonical novelization identifies Kassandra as the main character. The story includes figures such as Socrates, Pericles, and Brasidas alongside fictional family and political conflicts.

Odyssey is often confused with Origins because both games use ancient settings and role-playing systems. Origins is primarily set in Ptolemaic Egypt, whereas Odyssey focuses on the Greek world several centuries earlier. The game also includes mythological elements, but its historical setting remains Ancient Greece.