Ezio uses these relics of the 'First Civilization' that hold memories of Altaïr to relive Altaïr's experiences. He discovers Altaïr has sealed within the fortress an ancient artifact that is said to be a powerful weapon which could end the Templar-Assassin War forever, and had the keys hidden in Constantinople. The main part of the story takes Ezio to Constantinople in 1511 AD, consisting of four districts: Constantin, Beyazid, Imperial, and Galata Cappadocia during the rise of the Ottoman Empire, part of which is a completely underground city populated solely by Templars and Masyaf, where the old Assassins' stronghold is located (featured in the first Assassin's Creed game), to which Ezio travels at the beginning of the game. Revelations features all three of the series' major characters so far: Desmond Miles, Altaïr ibn La-Ahad and Ezio Auditore da Firenze.
The game was released for PlayStation 3 and Xbox 360 on November 15, 2011, and for Windows on December 2, 2011. Assassin's Creed: Revelations is the fourth major installment in the Assassin's Creed franchise developed and published by Ubisoft Montreal.
