Valve hat ein weiteres Update zu Proton veröffentlicht: Proton 6.3-8.

6.3-8:

The following games are now playable:
Age of Empires 4
Assassin's Creed
Breath of Death VI
Call of Duty: Black Ops II singleplayer (202970)
DEATHLOOP
FIA European Truck Racing Championship
Fly'N
Game Dev Tycoon
Ghostbusters: The Video Game Remastered
GreedFall
Mafia II (Classic)
Magicka
Marvel's Guardians of the Galaxy (AMD GPUs only)
Mass Effect Legendary Edition (ME1 does not have working audio, see #4823)
Monster Boy and the Cursed Kingdom
Monster Energy Supercross - The Official Video Game
Monster Energy Supercross - The Official Video Game 2
Nickelodeon All-Star Brawl
Penny Arcade's On the Rain-Slicked Precipice of Darkness 3
RiMS Racing
The Riftbreaker
Sol Survivor
TT Isle of Man Ride on the Edge
TT Isle of Man Ride on the Edge 2
Added support for an initial set of BattlEye games.
Improve compatibility with games using Valve's CEG DRM.
Support DLSS in DX11 and DX12 games (guarded by PROTON_ENABLE_NVAPI=1 and dxgi.nvapiHack = False).
Support latest Steamworks SDK.
Fix crashes in Project Wingman, Satisfactory and other Unreal Engine 4 games using the Vulkan renderer.
Fix a sporadic crash when starting Baldur's Gate 3.
Fix networked multiplayer in RaceRoom Racing Experience.
Fix cutscene desync in Assassin's Creed: Odyssey.
Fix audio stuttering in Gahkthun Steam Edition.
Fix Atomic Shop and random crashes on start in Fallout 76.
Fix Paradox Launcher (used by Europa Universalis IV) failing to display anything.
Fix video freezing and causing game to hang in Deep Rock Galactic.
Fix Industries of Titan not listing any resolutions and monitors.
Fix Bloons TD6 not being able to access account settings, see docs/ICMP_ECHO.md.
Fix Project CARS 3 ignoring inputs after Alt+Tab.
Fix stuck Alt key after Alt+Tabbing out and back for Warhammer: Chaosbane.
Support Thai characters in Mirror and other Unity games.
Support Korean and Arabic characters in Cyberpunk 2077 launcher.
Fix connection issues in Satisfactory on systems with multiple network interfaces.
Fix Biomutant videos not playing.
Update dxvk to v1.9.2-13-g714ca482.
Update vkd3d-proton to v2.5-50-g0251b404.
Update wine-mono to 6.4.1.

Auch Proton Experimental hat ein weiteres Update bekommen:

Available in Proton Experimental (as of 2021/11/24):

All changes from Proton 6.3-8.
Performance improvements around input, windowing, and memory allocation.
Updated file distribution method to save disk space.
Eve Online, Disgaea 4 Complete+ and Forza Horizon 5 are playable.
Fix The Sims 3 and Victoria II launcher crashes.
Fix Call of Duty: Infinite Warfare hanging on exit.
Fix flickering in Mount & Blade II: Bannerlord launcher.
Fix Age of Empires II HD Edition and possibly other games failing to render anything after displaying a video.
Improve Control windowing.
Improve startup time of games using CEG DRM.
Fixed regression with 2K launcher.
Fix Forza Horizon 5 multiplayer.
Fix EVE Online Client crashing on launch.
Silence screen reader error when starting Forza Horizon 5.
Update dxvk to include the latest development work.
Update vkd3d-proton to include the latest development work.