Which historical setting does Assassin's Creed Origins primarily depict?

Assassin's Creed Origins primarily depicts Ptolemaic Egypt.

The game is set mainly during the first century BCE, when Egypt was ruled by the Ptolemaic dynasty. Its story follows Bayek of Siwa, a Medjay who becomes involved in the origins of the Hidden Ones, the organization that later develops into the Assassin Brotherhood. Major locations include Alexandria, Memphis, and the deserts surrounding the Nile Valley.

Origins was released in 2017 and served as a historical prequel to the broader Assassin's Creed mythology. It includes figures such as Cleopatra VII and Julius Caesar, while presenting fictional characters and secret organizations alongside documented history. The setting is sometimes described simply as ancient Egypt, but “Ptolemaic Egypt” is more precise because the game takes place after Alexander the Great's conquest and before Egypt became a Roman province in 30 BCE.