Call of Duty Modern Warfare 2, previously known as Modern Warfare 2 and referred to during early development as Call of Duty 6, is the sequel to Call of Duty 4 Modern Warfare. It is currently under development by Infinity Ward, and is set to released on November 10, 2009. It was officially announced by Activision Blizzard on March 26, 2009, after being prematurely revealed on December 8, 2008.