According to a Steam press release yesterday, Valve is dumping a pile of money on L4D2 in hopes of winning big sales. It’s probably going to work, too. The sequel to everyone’s favorite zombie splatterfest is already performing at 300% in pre-orders of the original. Gabe Newell is calling the game the fastest selling title in Valve history.

The first Left 4 Dead got a similar treatment, though only at $10 million. That game was the top selling new IP for both 360 and PC for the year. Valve more than doubling the ad money is probably due in part to the success of the original, but also to fight skepticism that the game was being released too close to the original which would mean a loss of support for the older title.

You can get the full press release over at Steam.