[bt1a]

Do you use an application launcher / configuration manager like Lutris to do this? Or do you mean directly through steam? There's a steam game that I play often that tends to work the most frequently with proton hotfix for reasons unknown to me.

[russnes]

No just directly in Steam. You can just add a non steam game to your library and select the .exe file you want, and steam will create a c drive environment for each non steam game you add.

In some cases you might have to change which exe file it runs, if you initially run a setup.exe which creates the real exe file you'd want to launch inside the c drive environment folder

[112233]

Wait, can I run non-games like that, too? Launch all kinds of windowed GUI programms from Steam?

[jack_pp]

So you could run battle.net inside Steam? That would be fun, I've had issues with battle.net on wine / lutris