In the modern-day, the player controls Desmond in a series of first-person platforming levels within the Animus. Altaïr is playable in a smaller capacity, as he is featured only in a series of flashback missions set in Masyaf from 1189 to 1257. Ezio, who the player controls throughout the majority of the game, can freely explore Constantinople and complete side missions unrelated to the main storyline. Revelations features an open world and is played from the third-person perspective, with a primary focus on using Ezio's and Altaïr's combat, climbing and stealth abilities to eliminate targets and explore the environment. In Constantinople, Ezio becomes caught in a war of succession for the Ottoman throne and must unravel a conspiracy by the Byzantine Templars, who are attempting to reclaim control of the city and acquire the keys to Altaïr's library themselves. The main story spans the years 1511–1512, and follows an aged Ezio Auditore da Firenze (the protagonist of the trilogy) as he travels to Constantinople to find five keys needed to unlock a library built by Altaïr Ibn-LaʼAhad (the protagonist of the first game in the series).

The framing story is set in the 21st century and features the series protagonist Desmond Miles who, after falling into a coma during the events of Brotherhood, must relive the memories of his ancestors through the Animus device in order to awaken and find a way to avert the 2012 apocalypse.

The plot is set in a fictional history of real-world events and follows the millennia-old struggle between the Assassins, who fight to preserve peace and free will, and the Templars, who desire peace through control. A remastered version of Revelations, along with Assassin's Creed II and Brotherhood, was released as part of The Ezio Collection compilation for the PlayStation 4 and Xbox One on November 15, 2016, and for the Nintendo Switch on February 17, 2022. The game was released on PlayStation 3, Xbox 360, and Microsoft Windows in November and December 2011. It is the fourth major installment in the Assassin's Creed series, and a direct sequel to 2010's Assassin's Creed: Brotherhood, concluding the 'Ezio Trilogy'. Assassin's Creed: Revelations is a 2011 action-adventure video game developed by Ubisoft Montreal and published by Ubisoft.

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