After March 2010 , Valve stated that they expected Left 4 Dead 2 to be their fastest selling item to date .
In a press release on October 5 , 2010 Valve announced that , based on the strength of pre-orders , they expect Left 4 Dead 2 to be the fastest selling product in the company 's history , with the game 's pre-release sales averaging 300 % greater than Left 4 Dead .
Left 4 Dead 2