Sigh, this isn't how VALVe usually act, they usually have massive gaps between games like the gap between Tf and Tf2. I prefer it when VALVe enable a game to mature in the online space and add to it instead of releasing a whole new game. Hopefully, those who own L4D on PC will be able to merge the two games, or run all of the campaigns off L4D2, as I will still want to play scenarios from the first.