The new Stalker game seems to be running just fine on steam if ProtonDB is anything to go by. Nevertheless, I’d prefer to purchase the game on GOG and unfortunately I have yet to see any posts anywhere about how that version runs via Lutris as an example. I don’t expect there to be any issues but it would be nice to hear from people who’ve attempted to play it that way. Cheers.
Alternatively, or perhaps even concurrently, you can have a Proton instance without having Steam installed. Dunno how it works on Lutris, but besides being able to install Proton manually, you should also be able to install a few different versions of it through Heroic too. Dunno other means for that but probably are.
The basic tool is protonup-qt, which will lets you choose which versions of Proton and Proton-GE (and others) you want to install.
I don’t know if Heroic lets you install new versions or just lets you choose among installed ones.
About the tool, thanks. I’ll keep it in mind.
About Heroic, it allows installing several versions of a few forks of Wine, Proton and Proton-GE included, and it’s installed on a folder specific from Heroic, instead of installing on the whole system.