[dx87]

Valfaris is rated platinum on protondb, and it crashes on launch for me, same with Titan Quest, which is rated gold. Proton has been a godsend for gaming on Linux, but I don't put much stock in protondb beyond checking to see if a game is known to not run at all.

[viraptor]

I hope you reported your experience as well then? This is a user-maintained database, so unless people keep putting in their information, it will not be accurate/complete.