 The Xbox 360 version of "Left 4 Dead" was the seventh best-selling game of December 2008 in the United States, selling in excess of 629,000 copies.On February 3, Electronic Arts revealed that "Left 4 Dead" had sold 1.8 million copies, excluding Steam and worldwide sales figures.On March 26, Mike Booth revealed that the game had exceeded 2.5 million sales at retail during a presentation at the Game Developers Conference 2009.