Siwa is the ancient Egyptian city that serves as Bayek’s home and base in Assassin’s Creed Origins.
The game opens in Siwa, an oasis in Egypt’s Western Desert, where Bayek works as a Medjay. A Medjay was historically associated with Nubian groups and later with a protective or policing role in ancient Egypt. Bayek’s investigation into masked enemies leads him beyond Siwa and into a wider conflict that helps explain the origins of the Assassin Brotherhood.
Alexandria, Memphis, and Thebes are also important Egyptian locations in Origins, but they are not Bayek’s home base. The game is set during the Ptolemaic period, especially around the reign of Cleopatra VII and the political struggle involving Julius Caesar.