linuxmemes

Game Conqueror also works, but is missing a lot of features too from what I can tell. Don't know how it holds up against PINCE.

I've had success getting CE to run with Proton though, specifically by using SteamTinkerLaunch to run it as additional custom command with the game. There are other ways too, like protontricks. In my experience, it has been mostly stable, with the occasional freeze, but generally usable for pointer scanning and such.