Proton Experimental got a pretty hefty update, bringing in the 8.0-1 changes and a bunch of other fixes, you can see the complete list of changes below:
All changes from Proton 8.0-1
The following games are now playable:
Propnight
Combat Mission Battle for Normandy
Bloodrayne Terminal Cut 1/2
Breakout 13
Murasaki Tsurugi
PooShooter: Toilet Invaders
Purgo Box
Olympia Rising
Summoners War: Chronicles
Fixed various Wo Long: Fallen Dynasty issues around video playback.
Fixed game launcher DC Universe Online.
Fixed audio controls and spatialization in VRChat with AVPro.
Fixed the key presses registering weirdly in Wild Hearts.
Fixed video playback in Nioh: Complete Edition.
Fixed Pentiment not being playable on desktop.
Improved cutscene desync in Immortals Fenyx Rising.
Fixed Witcher 3 launcher rendering issues.
Fixed Call of Duty: Black Ops III graphical glitches when loading Hex Tower.
Fixed video playback speed issues in METAL GEAR SOLID V: THE PHANTOM PAIN.
Fixed Deus Ex: Human Revolution Director's Cut hanging on exit.
Fixed connection error at the end of Chapter 2 in Life is Strange Remastered.
Fixed EOS error message with Returnal and other EOS games.
Fixed intermittent hangs with Prototype.
Updated file distribution method to save disk space.
Updated dxvk to include the latest development work.
Updated vkd3d-proton to include the latest development work.
You can follow the Proton Experimental releases here