Valve secretly leaked a Left 4 Dead 2 trailer to dodge the ESRB

Former Valve writer Chet Faliszek revealed that the 2009 “leaked” Left 4 Dead 2 trailer was deliberately released by Valve to bypass the ESRB, which had refused to approve the trailer for public distribution. He explained the leak was a workaround to meet retailer requirements that demanded an ESRB rating for the game.