Assassin's Creed Mirage is a prequel to the events of AC Valhalla, principally taking place in Baghdad during the 9th century. The story focuses on Basim Ibn Ishaq, a cunning street thief who becomes an asssassin for the Hidden Ones and sets out to resolve a conspiracy within Baghdad's underworld - which is controlled by the Order of the Ancients.
Released to celebrate the series' 15th anniversary, AC Mirage brings the series back to familiar territory with stealth-based, action-adventure gameplay as opposed to the action RPG mechanics featured in previous titles.