Which Assassin's Creed game follows the Medjay Bayek of Siwa?

Assassin's Creed Origins follows Bayek of Siwa, a Medjay in ancient Egypt.

Bayek is a protector of his community who becomes entangled in a conspiracy threatening Egypt and its people. His investigation leads him across locations including Siwa, Alexandria, Memphis, and the Nile Valley during the final period of the Ptolemaic Kingdom.

Origins explores the formation of the Hidden Ones, the organization that later becomes known as the Assassin Brotherhood. The game therefore serves as an origin story for the series' historical Assassin tradition, rather than depicting an already established Brotherhood in the familiar medieval form.

Ubisoft Montreal released Origins in 2017. It also marked a major shift toward role-playing systems, including experience levels, equipment rarity, quests, and a large open world. Bayek is sometimes confused with Aya, his wife and an important founder of the Hidden Ones.