While the new date coincides with the 10th anniversary of the original Half-Life, Lombardi described it as an ironic coincidence, and explained that the game was delayed for fine tuning.
Original: The release of Valve's cooperative zombie shooter Left 4 Dead has been postponed until November 20, company president Gabe Newell revealed to Gamekings. nope
"Left 4 Dead is going to be released on the tenth anniversary of Half-Life, our first game," said Newell. "That will be on November 20th, the third week in November."
The oft-delayed title had previously been slated to hit PC and Xbox 360 on November 4. No reason was provided for the brief delay, though the crowded fall season--Gears of War 2 (360) arrives November 7--is believed to be a factor.