
Multiple games are now playable and more fixes have rolled out with Valve Software's latest Proton Experimental update.
Available in Proton Experimental as of January 22nd:
Now Playable:
Stronghold Crusader: Definitive Edition Demo
Atelier Resleriana: Forgotten Alchemy
Polar Night Liberator
Fixes:
Fixed non-Steam battle.net installations.
Fixed desync issue with 60FPS AVPro videos in VRChat.
Fixed Proton 9 regressions:
Fixed performance degradation in Dirt Rally 2.
Proton experimental updates can be found here.