I had to create the full engine.ini file from a comment on the issue on github https://github.com/ValveSoftware/Proton/issues/641#issuecomment-627059621 (use the full details section). No commands needed.
I found a fix for the vanilla variant in the Dawn Of Discovery: Venice section (https://www.protondb.com/app/33340) by the author Mitsukuni. I have provided a link for any who wish to use it.
Sound and cursor loads, screen is black.
Sound and cursor load. Screen is black.
Can start a game, but after a save the game screen goes black.
No issues at all and even runs more smoothly with higher frame rates than in Steam on Windows 7
Large maps run out of memory and crash. Playing smaller maps seems to work with minor performance issues.
Just getting a black screen with a mouse cursor, music is playing in the background.
The game starts, but the screen goes black. Only the mouse works.
There was noticeable slowdown in a majorly built city in the intro but otherwise, the game runs like it was on Windows