Steam Error message? "The game is currently unavailabe"

[strategyonly]

I get this message each and every time i try to start Civ V?

How do i get it to work? I just got my puter back and re-installed Civ V but cant do anything because of this Steam message?

It was working before i installed the SDK, but now nothing?

 

[CarloTheCurious]

Try this.