In Assassin's Creed Origins, which ancient region is the primary setting for Bayek's story?

Ptolemaic Egypt is the primary setting for Bayek's story in Assassin's Creed Origins.

The game takes place mainly in Egypt during the reign of Cleopatra VII, in the first century BCE. Bayek of Siwa is a Medjay, a traditional Egyptian protector, whose search for revenge gradually develops into the founding story of the Hidden Ones, the organization that becomes the Assassin Brotherhood. His wife, Aya, is also central to the plot and its political developments.

Origins includes major places such as Siwa, Alexandria, Memphis, Cyrene, and Giza. The setting is called Ptolemaic Egypt because the Ptolemaic dynasty ruled Egypt at the time, despite the kingdom's strong Greek cultural and political influence. The game is not set in Classical Greece, and it predates the Roman imperial period represented in some later historical events.