Which historical civilization is central to Assassin's Creed Odyssey's setting?

Ancient Greece is central to Assassin's Creed Odyssey's setting.

The game takes place during the Peloponnesian War, a conflict between Athens and Sparta that began in 431 BCE. Players explore a large version of the Greek world, including mainland regions and islands, while following the story of a mercenary from the Spartan royal line.

Odyssey includes historical figures such as Pericles, Socrates, and Aspasia, alongside mythological elements and fictional characters. Its setting combines political conflict, naval travel, mercenary contracts, and locations inspired by Greek history and mythology.

Ancient Egypt is the setting of Assassin's Creed Origins, while Renaissance Italy defines Assassin's Creed II. Viking England is the principal historical environment of Assassin's Creed Valhalla. These games are adjacent in the franchise's historical timeline but represent different civilizations.