MonstaMack on 07 June 2009
I would say sales had a large part of L4D2 getting the green light for 2010. It's no surprise that FPS sell very well on the 360, and with L4D1 moving over two million units on the 360 alone that's pretty damn huge and hard to ignore if money is to be had. I'm guessing between PC and 360 sales they sold atleast 5 million units combined with Steam.
It's just that simple.
