Which historical civilization and region does Assassin's Creed Origins primarily portray?

Assassin's Creed Origins primarily portrays Ptolemaic Egypt.

The game is set in the first century BCE, during the final period of the Ptolemaic Kingdom. Its protagonist, Bayek of Siwa, is a Medjay who becomes involved in the formation of the Hidden Ones, the precursor to the later Assassin Brotherhood.

Players travel through locations such as Siwa, Alexandria, Memphis, and Giza. The narrative includes historical figures including Cleopatra VII, Julius Caesar, and Ptolemy XIII. The setting shows Egypt during a period of political rivalry and increasing Roman influence.

The title Origins refers to the fictional beginnings of the Assassin tradition, not to the entire history of ancient Egypt. Assassin's Creed Odyssey is set mainly in the Greek world, while Assassin's Creed Valhalla focuses on Viking-era England and Norway. Origins was released in 2017 and also introduced major role-playing mechanics to the series.