UnknownUnknown
First launch crashed instant. Then it worked okay
Without GE it wouldn't start. Crashed some time but I did no tinkering. I am optimistic that it will work. I could play level 1 with GE without a crash - after that it crashed once
Got the demo to run but crashes after about 10 seconds into the main menu
On installation, you're asked to install 'Microsoft Visual C++ Runtime', which leads to a UE4 installer which fails. This can be worked around with a method listed for Medieval Dynasty, more about that here: https://www.protondb.com/app/1129580/
Basically, you have to manually get the 'VR_redist.x64.exe' runtime and replace its name with the UE4 installer provided in the games directory. After that, you can proceed through the Visual C++ runtime installation and you can get the game to start. I also used 'protontricks 1620610 vcrun2019', but this appid should be for the demo only.
I was unable to continue playing but hopefully somebody else will find this useful.
