After January 2011 , Left 4 Dead 2 sold 2.9 million , while more than 4 million copies of were sold at stores in 2010 , and in July 2011 , about 12,000 people were mistakenly banned by Valve's-Anti-Cheat system .
In February 2010 , Electronic Arts , Left 4 Dead 2 retail distributor , revealed that the game had sold 2.9 million on retail so far while Forbes wrote that more than 4 million copies were sold at stores in 2009.Over two weeks in July 2010 , approximately 12,000 owners of Call of Duty : Modern Warfare 2 were mistakenly banned by Valve's-Anti-Cheat system .
Left 4 Dead 2