I just thought this was worth a mention.
Valve is running an ARG in the steam store right now.
Here's some info because i'm too lazy to write anything myself.
also, keep calm. It's probably just some fun for...
First of all: The amount of exclamation marks and question marks together looks really desperate/confused/furious (pick one) and I rarely see it nowadays, and it was a refreshing to see such emotion instead of all the shitposting I'm used to see in other forums.
Secondly: As Vegeta897 pointed...
I'm very exited for this game, The first game was a blast to play, and this one looks like they stepped it up alot!
I'd really like one, I'm Hardy P on steam as well. www.steamcommunity.com/id/HardRenaLine
This is just a guess, but in Steam, rightclick Left 4 Dead 2 -> Properties -> Set Launch Options -> remove -insecure.
EDIT: this might give you some answers, but it won't solve it.