I‘ve checked a few of the resources I found here but I seem to be unable to wrap my head around this.
I want to play one specific game purchased from GoG on my Steam Deck. It only has a windows installer. I don’t need a fancy launcher (at the moment). The game has low hardware requirements so should run fine via emulation/proton…
What’s the easiest way to install and add this game to game mode?
Edit: clarification on the launcher. I don’t necessarily need one. If it is the easiest way to get it done I still would consider installing one.


Adding to that, iirc the user needs to change the EXE on Steam after the install, else Steam will keep trying to open the installer.
Funnily enough I tried to do this with battlenet and it didn’t work but if I just run the original added installer on steam it auto runs properly
That’s because every time you run a new program with Proton on Steam it creates a new Wine-prefix (fake Windows drive). So when you run the installed battlenet.exe it creates a new Windows environment where Battle.net is not installed.
But the installer is using the environment where Battle.net is installed and apparently it has a function to run Battle.net when it detects that it’s already installed.
Unfamiliar with Battle.net, but the problem sounds like a case of DRM and the solution sounds like the installer tries to normalize launchers and you are able to leverage it.
I think I run guildwars1 off the original installer as well which also just autolaunches properly but I believe that installer has always properly supported launching an installed exe if found
Battlenet works just fine and I play StarCraft through it perfectly but I was totally stumped why following the instructions failed and running it off the installer works.
Neither even shows the installer it just directly runs the client