I asked some people and the only advice I got back was to put all your video settings (in Proton ?) to minimum and see whether this makes the game run. if it does, you can experiment with the settings to find which one causes the crash.

It looks like you may have already tried this. Sorry, I don't know enough to advise anything else.

Hi, thanks, that was actually a good advice. I set everything to low and turned off pretty much everything and now it's working. I'll play with the setting tomorrow to see what is the problematic one and will leave here a note, so that people know.

Glad you got it working. I hope you can identify a balance of settings which gives good graphics without crashing.

I need to warn you about a map late on in the game. (Rarely you move from one map to another, and see a loading screen between them.) This is an outdoor map with a lot of detail and objects in it, and it causes some people's computers to crash even though they're playing in a normal Windows setup. So you might progress through the game and find that at some point you get more crashes. The fix is the same as you've just experienced: lower the graphics settings until you've got past that map. Then you can put them back up again.

Or you might be like me. For some reason I never had that problem and played the whole game at good graphics settings. On an old computer not intended for games.