You can download Proton for use outside of Steam, I use it in Lutris and Bottles pretty regularly. Also, you should be able to get just about anything to run just as well in Bottles or Lutris as it will in steam, but I will admit it can take some tinkering with some games or software and there is a much easier option: Add “non-steam game” in Steam library and run whatever program you need through Steam anyway.
Proton works nicely in steam
Non steam games is an entirely different complicated issue (for some games)
You can download Proton for use outside of Steam, I use it in Lutris and Bottles pretty regularly. Also, you should be able to get just about anything to run just as well in Bottles or Lutris as it will in steam, but I will admit it can take some tinkering with some games or software and there is a much easier option: Add “non-steam game” in Steam library and run whatever program you need through Steam anyway.
Epic and GOG work on Heroic just fine and I’ve run two standalone games (Elite Dangerous and ESO) using Lutris with no problems.
Heroic works great for pirated hentai games and GOG games.