Install game and select proton version. Run game and wait for crash then remove Mono from the PFX

https://steamcommunity.com/sharedfiles/filedetails/?id=2386287653

I manually removed these files. This is not a script to just run.

              #----------------------------------------------------------------------------------------
              # *** REMOVE PROTON MONO BUILTINS
              #----------------------------------------------------------------------------------------
              # Remove mono files
              rm -r "${PFX}/drive_c/windows/Microsoft.NET"
              rm "${PFX}/drive_c/windows/system32/mscoree.dll"
              rm "${PFX}/drive_c/windows/syswow64/mscoree.dll"

              # Remove openal (to fix the installer, will be installed later)
              rm "${PFX}/drive_c/windows/system32/openal32.dll"
              rm "${PFX}/drive_c/windows/syswow64/openal32.dll"

              # Proton fix: extract_cabinet FDICopy failed error (seen with dotnet40 since Proton 5.13-5 as winxp64)
              rm "${PFX}/drive_c/windows/system32/dxva2.dll"
              rm "${PFX}/drive_c/windows/syswow64/dxva2.dll"
              rm "${PFX}/drive_c/windows/system32/evr.dll"
              rm "${PFX}/drive_c/windows/syswow64/evr.dll"
              rm "${PFX}/drive_c/windows/system32/uiautomationcore.dll"
              rm "${PFX}/drive_c/windows/syswow64/uiautomationcore.dll"

              # Proton fix: wine's builtin fusion.dll fails to create legacy assembly directory (https://bugs.winehq.org/show_bug.cgi?id=45930)
              mkdir -p "${PFX}/drive_c/windows/assembly"
              
              # Remove mono tracked_files from proton configuration
              # Shouldn't be necessary since Proton does not touch files that are not symlinks and not builtin but left as-is
              sed -i.bak '/openal32/d;/dxva2/d;/evr/d;/uiautomationcore/d;/mscoree/d;/Microsoft.NET/d' "${X}/steamapps/compatdata/${STEAMAPPID}/tracked_files"

Then run

                                protontricks 72200 dotnet20