Je me sens d'humeur généreuse en ce début d'après-midi:
"Go into your Rock of Ages folder (steam/steamapps/common/rockofages/) and go into the prerequisite folder and try and reinstall the latest DirectX and the redist packages (make sure you pick the right one).
I don't know if those will exactly fix your problem, but what you're explaining is actually fairly common. UE3 games are very picky when it comes to your DirectX and all that other stuff.
I had a similar problem with Red Orchestra 2, which uses the same engine as Rock of Ages. I couldn't get it to start until I ran its included redist packages."
D'après les forums internationaux, ça a réglé les problèmes de ceux qui l'avaient