I having one of those things… Ya’ know a picture with words…
Heroic Games Launcher could be the answer. The GameVault devs wouldn’t need to reinvent the wheel with a Linux client dealing with all the proton sand boxing. Just add to the heroic launcher.
Looks like someone has already had a similar thought too…
https://github.com/Heroic-Games-Launcher/HeroicGamesLauncher/issues/2951
ROCK AND STONE!