The community is also a great place to check out. Try these places for help from other users:
If you're encountering issues with launching or playing this product, make sure everything installed correctly.
Exit Steam entirely.
Reboot your computer and test the issue again. If the issue persists, you will need to contact Support.
If the above does not resolve the issue and you are running Windows 7, Windows 8, or Windows Vista, please complete the instructions in our Windows 7, Windows 8, and Vista Troubleshooting FAQ.