I installed with heroic
Add non steam game
Highlight bg3.exe or maybe dx version can’t remember now from bin directory “not launcher”
Run with proton 8.0.3 I think
Crashed first time but fine since
[340:352:20230804,083255.364:ERROR crashpad_client_win.cc:521] CreateProcess: File not found. (2)
[340:492:20230804,083259.209:ERROR crashpad_client_win.cc:132] crash server failed to launch, self-terminating