With Linux gaming clearly showing it’s becoming more popular, and with GOG under new ownership, there’s hope yet that GOG will improve their Linux support.
GOG does currently support Linux — well, kind of. They publish Native Linux packages for various games, which depends on the developer (just like Steam does without Proton) but they have a very limited support of distributions, which can cause problems installing Linux games from GOG due to dependency mess. That, and GOG Galaxy does not support Linux.
There’s easier ways to install games from GOG on Linux / SteamOS though, which you can check out in our GamingOnLinux Guide. You can even do it directly in Steam if you want to.
Heroic can be hit or miss in my experience. I found that using the offline installers in Bottles would get those broken games working, which is interesting since I think Bottles still defaults to a fork of wine 9.
I default to Lutris for my offline installers and for games that isn’t one click installs when trying them in heroic games launcher.
For most games that one click install in heroic has been working fine fthough.