If you launch the game and find it’s stuck on the loading screen, there are a few troubleshooting steps we suggest undertaking in order to get it to work.
First of all, remove any Workshop files like custom graphics and logos you may have added in preparation of launching the game. This can occasionally interfere or slowdown the game when launching.
Once you’ve done this, we would suggest deleting your cache and preferences, then reverifying the game files via Steam. Details on how to do t