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.
I don’t see how AreWeAntiCheatYet and PC Gaming Wiki are an alternative to ProtonDB. They all have a completely different purpose. If you are just looking for any kind of information, database or wiki about games, then have a look at following additional resources.
I don’t think that all of these are a replacement for ProtonDB and Open Source, but so aren’t your own examples either. I think there are interesting resources to consider visiting.