Assassin's Creed: Altaïr's Chronicles is a 2008 video game released for the Nintendo DS, the iPod Touch/iPhone 4, Symbian Mobile, Windows Phone 7, and Sony Ericsson Xperia Play as a prequel to Assassin's Creed. It was published by Ubisoft and developed by Gameloft, and was released in the United States on 5 February 2008. A port with improved graphics and gameplay was made for iOS by Ubisoft and released on 23 April 2009.