Assassin's Creed: Revelations is an entry in the historical series with an open world environment and a focus on stealthy gameplay. Once Desmond Miles is forced to stab his ally, he falls into a coma. He then returns to the Animus to retain his consciousness. Once in the Animus, he falls into a back door known as the Black Room. There he hopes to reassemble his fragmented mind, to awake from his coma. He can do this by connecting his mind by locating a key memory. Along the road to doing that, he starts to relive the later memories of Ezio. The new Grand Master of the Assassin Order, after freeing Italy from the Templar threat, questions his life as an Assassin, wondering how it would've been had he never been one. Ezio thus sets out on a pilgrimage to his predecessor's homeland of Masyaf, which he discovers has been overrun by the Templars. There he finds an ancient artifact, which is locked away, and can only be opened with five keys. The search for these seals takes him to Constantinople, where he finds out that there is an army of Templars forming in the city, threatening to destabilize the region. Ezio must follow in the footsteps of his spiritual mentor, Altaïr, to lead him to discovery and revelation.