Which Assassin's Creed game is set primarily in Constantinople and stars an older Ezio Auditore?

Assassin's Creed: Revelations is set primarily in Constantinople and stars an older Ezio Auditore.

The game follows Ezio in the early sixteenth century as he travels to Constantinople, the capital of the Ottoman Empire, to search for keys connected to Altaïr's former stronghold in Masyaf. Ezio's investigation links his own life to the earlier Assassin and brings the first major Ezio trilogy to a conclusion.

Constantinople is divided into districts influenced by Ottoman, Byzantine, and multicultural history. Ezio works with members of the Ottoman Assassin network, including Yusuf Tazim, while confronting the Templars' ambitions in the city. The game also returns to Altaïr through playable memory sequences.

Brotherhood is set mainly in Rome and focuses on Ezio's campaign against the Borgias. Assassin's Creed II covers his rise in Renaissance Italy. Revelations is therefore the title that combines Constantinople, an older Ezio, and the closing chapter of his central trilogy.