XIII is a first-person shooter video game developed by Ubisoft Paris and published by Ubisoft for most platforms except for the OS X version, which was published by Feral Interactive. Loosely based on the first five volumes of the 1984 Belgian graphic novel series XIII the protagonist Jason Fly (XIII), a confused and amnesic man who searches for his identity throughout a comic book-style, cel-shaded world. Found stranded on a beach by a lifeguard, Fly is accused of having killed the President of the United States. The accusation later transpires as mistaken, as Fly finds himself facing a gang of 20 conspirators ("The XX") who aim to overthrow the government.The game was released for Microsoft Windows, PlayStation 2, Xbox, GameCube and OS X. A reimagining of XIII, the point-and-click adventure game XIII: Lost Identity, was released on 17 October 2011 for PC, Mac, iPhone and iPad.