Gamers are a fickle bunch. Had Valve announced Left 4 Dead 2 in 2010 or 2011, fans would have been falling over each other in desperation to get their hands on it. In 2009, however, the Left 4 Dead 2 announcement has been treated almost as though Valve just relieved itself on the barbeque. As the number of complainers grows, Valve has been forced to publicly defend its controversial decision.