I've previously had good results for things like this using proton-exec and this script.
There's also Steam Tinker Launch, which I've been meaning to check out. It seems really robust and full of the kind of features you're looking for.
This kind of thing is a feature that has been requested by many for Steam over the years, and I echo that sentiment.
Thanks for the hint. I'll try it.
I play Euro Truck Simulator 2 (227300) with Proton 6.3-4.
There is an additional Windows program called trucksbook which logs your freights by reading telemetry data provided by the game.
It has to be started before the main Game.
I successfully installed trucksbook in game prefix and i can start it in terminal with:
STEAM_COMPAT_DATA_PATH="/home/user/.steam/steam/steamapps/compatdata/227300" "/home/user/.local/share/Steam/steamapps/common/Proton 6.3/proton" run "/home/user/.steam/steam/steamapps/compatdata/227300/pfx/drive_c/Program Files (x86)/TrucksBook Client/TB Client.exe"But when i start the main game in Steam client, it doesn´t come up not till i close the TB Client.exe. After that, the game continuous booting and starts normal.
So how can i start both programs?
steam-227300.log