Since ProtonDB is proprietary and also directly linked with Steam games instead of any game possible, I was looking around for open source alternatives to it. I found Are we anti cheat yet which is pretty cool but it's limited just to the anti cheat working or not, and also PC Gaming wiki which is for all games but no longer for Linux compatibility in specific, so the answers are also much more vague.

Is there anything I haven't discovered? It seems like there's no good alternative to it currently, not even one that just lacks user input.