You may try this:
- Create a new profile and put the PC in the profile. Save your settings.
- Pause the profile.
- Play the game on the PC.
If you are able to play the game, then the game does not need an Internet connection to play.
If you are not able to play the game, open the pcWRT management console and check the Internet logs. See what connections were blocked for the PC. Enter the appropriate domains in the Blocked URLs box.