Which Assassin's Creed game is set mainly in the Egyptian Ptolemaic period?

Assassin's Creed Origins is set mainly in Egypt during the Ptolemaic period.

The game takes place in 49 BCE and follows Bayek of Siwa, a Medjay, as he investigates threats to his family and becomes involved in the origins of the Hidden Ones. The story visits Alexandria, Memphis, Cyrene, and other locations across Egypt.

Origins portrays Egypt during the reign of Cleopatra VII and the political struggle involving Ptolemy XIII. It also includes prominent historical figures such as Julius Caesar, although the game's Assassin Brotherhood is presented as an early form of the later organization.

The title is sometimes confused with Odyssey, which is set mainly in ancient Greece, or Mirage, which centers on ninth-century Baghdad. Origins is specifically the series entry built around the birth of the Hidden Ones.