High Quality Content by WIKIPEDIA articles! Deus Ex: Invisible War is an action role-playing video game developed by Ion Storm and published by Eidos Interactive. Released simultaneously for Microsoft Windows and the Xbox video game console on December 2, 2003, the game is a sequel to the critically acclaimed Deus Ex. Invisible War was well-received commercially, holding 80 and 84 scores at Metacritic for the Windows and Xbox versions, respectively, and selling more than 300,000 copies in North America. Despite this, the game`s critical reception was not as positive as its predecessor`s—for example, PC Gamer gave Deus Ex a score of 94%, while Invisible War received an 83%. This was due to a large number of design choices that led certain critics to label the game as being oversimplified, relative to its predecessor. It has sold more than 1.2 million copies, as of April 23, 2009.