Splinter Cell: Chaos Theory

 is a stealth game developed by Ubisoft Montreal and published by Ubisoft on March 28, 2005 in North America and on April 1, 2005 in Europe for the Microsoft Xbox and other platforms. New single player missions and VS mode maps were released on Xbox Live, but the content is no longer available with the discontinuation of Xbox Live support for the original Xbox on April 14, 2010.