Have you tried verifying your game files?
Right-click the game in your steam library, go to properties, and to Local Files, then to 'verify integrity of game files'. Run that, and start the game - see if it works!
Have you tried verifying your game files?
Right-click the game in your steam library, go to properties, and to Local Files, then to 'verify integrity of game files'. Run that, and start the game - see if it works!