I have experienced something strange in achievements. The first campaign I beat on expert was was Dead Center. Sometime after that, I looked at the achievement Still got something to prove, and it said 0/5. Now, I figured that even though I don't remember dying in this playthrough, I must've, and that must be why it didn't count. However, when I beat Dark Carnival on expert I found this is not the way it works(1/5 now). The game doesn't care if you had a perfect run or how many times you died as long as you live through the finale. So with that said, why is it not 2/5? Why would Dead Center not count toward this achievement? Is it not one of the original 5 scenarios of L4D2?? (According to my Xbox360 copy of the game, it is) And, if it doesn't count, then which scenario actually DOES count in it's place?