This is a very small bump fixing Proton 10.0 regressions.
For the main changelog see https://github.com/ValveSoftware/Proton/releases/tag/proton-10.0-1b.

• Fixed issue where generated libraryfolders.vdf file had garbage memory written to it breaking software relying on it, e.g. mod launchers.
• Restored behavior that does best-effort Proton prefix upgrades when a unknown prefix version is detected.

• Now playable (previously worked with Proton Experimental):
  • Batman: Arkham Asylum Game of the Year Edition
  • Black Ink
  • Factorio
  • Ignited Entry
  • Microsoft Flight Simulator 2024
  • MySims Kingdom
  • No Man's Sky in VR mode (regressed after a game update)
  • Rising Storm 2: Vietnam
  • Sniper Elite: Nazi Zombie Army
  • Soul Interface
  • THE KING OF FIGHTERS XIII GLOBAL MATCH
  • VIDEO GAME (924310)
  • Willful
  • X Rebirth VR Edition
• Fixed / improved video playback in:
  • Agony Unrated
  • All-Star Fruit Racing
  • Audiosurf
  • Bloodstained: Ritual of the Night
  • Gal*Gun 2
  • Greedfall
  • Indigo Park: Chapter 1
  • Omensight
  • SOULCALIBUR VI
  • TELEFORUM
  • Tintin Reporter - Cigars of the Pharaoh
  • Zero Escape: The Nonary Games
• Reinstated hack from Proton 7 that helped with SpellForce: Platinum Edition, NieR: Automata, Sekiro: Shadows Die Twice and DARK SOULS III crashing with monitors exposing too many possible resolutions.
• Improved performance in Dirt Rally 2.0.
• Fixed Final Fantasy XVI demo displaying driver warning on launch.
• Fixed Grand Theft Auto V Enhanced launcher hang and the game crashing on launch as well as not being possible to uninstall it via Steam.
• Fixed XCOM 2 erroring out when trying to connect to my2K.
• Fixed network issues in Hunt: Showdown 1896 after a game update.
• Fixed Rivals of Aether II, Stalker 2, The Axis Unseen, Beyond Handwell, Marvel Rivals, The Finals, Creatures of Ava crashing with Intel GPUs.
• Added support for game mods that load via custom dinput8.dll.
• Fixed input not working with Studio System : Guardian Angel.
• Fixed cursor not working in the menu of Amerzone: The Explorer's Legacy (1999).
• Fixed Deviator crashing with AMD GPUs shortly after launching.
• Fixed Warhammer: Vermintide 2 showing prerequisite installer on every launch.
• Re-enabled nvapi for Neverwinter, Star Trek Online and Champions Online.
• Fixed full screen mode in The Bright Star Of Seraph-Katis.
• Improved situation with audio crackling in Assassin’s Creed Shadows on Steam Deck.
• Improved reliability of Proton Prefix creation.
• Fixed Supermarket Together not detecting DLC on some systems.
• Fixed extras video playback in Shadow Warrior 2.
• Fixed VR mode in Evochron Legacy SE.
• Fixed non-Steam Battle.net installations.
• Fixed Sea of Thieves Xbox login window not working.
• Fixed graphics scaling in Master Magistrate.
• Fixed interface elements in Disney Epic Mickey 2: The Power of Two showing as solid green color.
• Included initial work on speech synthesis - requires manual installation of Proton Voice Files (steam://install/3086180), confirmed to work with The Thief, the Witch, the Toad, and the Mushroom.
• Fixed video playback in Twisted Sails.
• Improved video playback in Max: The Curse of Brotherhood.
• Added hack to allow Steam Overlay to function with EAC EOS games.
• Fixed CPU topology override issues on machines with more than 32 logical cores.
• Fixed Proton sometimes creating an empty window when running via XWayland.
• Fixed Marvel Rivals displaying OS/drivers out of date warning.
• Fixed desync issue with 60FPS AVPro videos in VRChat.
• Fixed intermittent freezing in Spirit Hunter: NG.
• Fixed The Finals crashing after a recent game update.
• Improved Ubisoft Connect behavior when switching between Proton versions.
• Improved video playback in Locoland on NVIDIA GPUs.
• Improved video playback in Microsoft Flight Simulator.
• Fixed Tiny Cauldron freezing when selecting some resolutions.
• Fixed various crashes affecting Final Fantasy XIV launcher.
• Fixed broken account creation in Final Fantasy XIV.
• Fixed Nioh: Complete Edition hanging on a black screen when skipping videos.
• Fixed Killsquad freezing on character selection screen.
• Fixed Dread X Collection 3 Bete Grise minigame.
• Fixed video playback in ATRI - My Dear Moments-.
• Fixed Dark and Darker not being playable after a game update.
• Updated libvkd3d-shader to vkd3d-1.15-179-g21e08955d3c3.
• Updated dxvk to v2.6.1.
• Updated dxvk-nvapi to v0.9.0.
• Updated vkd3d-proton to v2.14.1-153-ga7159b80e165.
• Updated wine-mono to 9.4.0.
• Updated Xalia to 0.4.5 and enabled it for The TakeOver, Floppy Heroes, Whiskered Away, Himno, Survirus, The Adventure of Ninomae Ina'nis.
• Rebased Wine on top of wine-10.0.
• Added Steamworks SDK 1.62 support.

• Now playable:
  • APB Reloaded
  • Conqueror's Blade
  • Cube Hero Odyssey
  • Disgaea 4 Complete+
  • Hard Chip Demo
  • ScarQuest
  • Sniper Elite: Nazi Zombie Army 2 (AMD GPUs only)
  • Test Drive Unlimited Solar Crown
  • Total War: SHOGUN 2
  • Warhammer 40k: Space Marine 2 (requires disabled Steam Overlay)
  • Welcome to Dustown
• Fixed Hell Let Loose crashing when joining a server after a recent game update.
• Fixed Final Fantasy XVI having low FPS due to excessive DLL lookup.
• Fixed Final Fantasy XVI not showing displays in settings.
• Fixed keyboard input in Rivals of Aether II.
• Fixed Chromacell crashing on launch on AMD GPUs.
• Added support for NVIDIA Optical Flow API and DLSS 3 Frame Generation.
• Fixed Dragon Age: The Veilguard displaying a warning about being installed on a spinning drive.
• Fixed Crazy Taxi randomly crashing when starting a game.
• Added a warning in Proton logs when running on system with low max_map_count.
• Fixed single player game not working in Star Wars - Jedi Knight II: Jedi Outcast.
• Fixed Hard Reset Redux and Shadow Warrior crashing with AMD GPUs.
• Fixed Skull and Bones not exiting cleanly on systems with Nvidia GPUs.
• Fixed Dark and Darker not being playable after a game update.
• Fixed EA Desktop App setup not being configurable.
• Improved video playback in March of Empires and Devil May Cry 3 Special Edition.
• Fixed trigger buttons not registering in I Expect You To Die.
• Fixed Proton 9.0 regressions:
  • Multiplayer works again in Hotshot Racing.
  • Fablecraft is playable again.
  • I Expect You To Die is playable again.
  • Star Wars: Knights of the Old Republic no longer launches to a black screen when in fullscreen mode.
  • Marlow Briggs and the Mask of Death is playable again.
  • B-17 Flying Fortress - The Mighty 8th: Redux is playable again.
  • Games now launch on the correct screen on setups with multiple monitors connected to multiple GPUs.
• Fixed Yakuza 3 Remastered and Yakuza 4 Remastered not being playable on some setups.
• Fixed Yakuza 6 crash when trying playing Puyo Puyo mini-game.
• Fixed Knowledge, or know Lady crashing about 10 minutes after launch.
• Fixed multiplayer in SpellForce 3: Versus Edition.
• Fixed font rendering in SpellForce 3: Versus Edition.
• Fixed mod support in DOOM Eternal.
• Fixed Mary Skelter 2 stuttering on launch.
• Fixed The Finals not starting with non-English locale.
• Fixed Traditional Chinese font rendering in Mashiroiro Symphony HD -Sana Edition-.
• Fixed Korean input in Diablo IV.
• Fixed newer Unreal Engine games trying to install redistributables on each launch.
• Fixed Astral Ascent hanging when unplugging a controller.
• Fixed playback of videos in Max: The Curse of Brotherhood.
• Fixed controller support in Clash for Crust.
• Fixed FPS drops in Red Dead Redemption 2 when keys are pressed.
• Fixed Hunt: Showdown 1896 failing to start after a recent game update.
• Fixed full screen in Dog Brew on Steam Deck.
• Fixed support for BattleServer in Age of Empires II: Definitive Edition.
• Fixed voice chat in For Honor and UNO.
• Fixed Proton not setting priorities correctly for new threads.
• Fixed Unreal Engine Crash Report Client not launching properly.
• Improved loading times in Pharaoh Rebirth+.
• Fixed missing icons in Age of Mythology: Retold.
• Fixed video playback in March of Empires.
• Improved performance in Blood Strike.
• Enabled Xalia for MultiVersus - prerequisite installation can now be done with a controller.
• Updated Xalia to 0.4.4 and enabled it for Trackmania United Forever, Trackmania Nations Forever, Oddworld: Stranger's Wrath HD, Fallout: New Vegas, and WARRIORS ALL-STARS.
• Updated Wine Mono to 9.3.1.
• Updated dxvk to v2.5.1 + a regression fix.
• Updated dxvk-nvapi to v0.7.1-94-gafb59a8e841b.
• Updated vkd3d-proton to v2.13-241-g4fd7d3ab3d35.
• Updated vkd3d-shader to vkd3d-1.14 + a hack.

• Now playable:
  • Avatar: Frontiers of Pandora (desktop only)
  • Ball at Work: The Ultimate Speedrun Platformer!
  • Banyu Lintar Angin
  • Dinner with an Owl,
  • Farlight 84
  • Flatout 3
  • KinitoPET
  • Owl Observatory Demo
  • Sleeping Dogs: Definitive Edition
  • Super
  • Sword of Convallaria
  • Syberia
  • THE KING OF FIGHTERS XIII STEAM EDITION
  • To Pixelia Demo
  • Unity of Command II
  • Zaccaria Pinball
• Fixed 9.0 regressions:
  • Alan Wake's American Nightmare's DLC is playable again.
  • Bionic Commando is playable again.
  • Controllers work again in Sonic Forces.
  • GRID Autosport and GRID 2 are playable again.
  • Noita mods no longer fail to update.
  • Warhammer 40,000: Darktide no longer freezes randomly when processing shaders for the cache.
• Improved language support for Guild Wars 2.
• Enable controller support in the launchers of Fallout 3 (standard and GOTY edition) via Xalia.
• Fixed cutscene playback in Iragon games.
• Fixed Yakuza Kiwami not working on certain setups.
• Added support for D3D12 in OpenXR.
• Fixed AVPro playback in VRChat.
• Fixed video quality of live streamed episodes in Quantum Break.
• Fixed artifacts in Yakuza 4 Remastered opening video.
• Improved support for workshop levels in Zeepkist.
• Improved loading time of Arcanum.
• Fixed Aimlabs having broken News section.
• Fixed RAID: World War II randomly hanging on start.
• Fixed Strip Fighter ZERO not starting on some setups.
• Fixed Undecember not being playable after a recent game update.
• Fixed missing cursor in IL-2 Sturmovik: Cliffs of Dover Blitz Edition.
• Fixed a crash in Starfield: Creation Kit.
• Fixed text not being displayed during the installation of EA Desktop launcher.
• Fixed "Customize Setup" not working during EA Launcher installation.
• Fixed Halo Infinite rendering using a weird resolution on a Steam Deck.
• Improved microphone support in Squad.
• Fixed License Agreement not displaying correctly in Romance of the Three Kingdoms [JP].
• Fixed FINAL FANTASY XII THE ZODIAC AGE displaying white screen on launch on Steam Deck OLED.
• Fixed microphone not working with Helldivers 2 after a recent game update.
• Fixed freezes in Dinogen Online.
• Fixed Dinogen Online crashing randomly on start.
• Fixed SCP Secret Laboratory crashing after a recent game update.
• Fixed Burnout Paradise Remastered crashing when an input video device is plugged in.
• Improved memory usage of Burnout Paradise Remastered and lowered the chances of crashing.
• Fixed font rendering in Insanely Twisted Shadow Planet.
• Fixed Once Human crashing when trying to join a server or opening the EULA on fresh Proton prefixes.
• Fixed Ubisoft Connect requiring a manual log in with a new prefix with Far Cry 3 Blood Dragon (some other games may still suffer from that similarly as on Windows with a clean Ubisoft Connect install).
• Fixed The Finals not being playable after a recent game update.
• Fixed video playback in Spirit Hunter: NG.
• Improved memory usage when playing videos in 32bit games.
• Fixed font rendering in Shady Brook - A Dark Mystery Text Adventure.
• Fixed Steam Deck users being forced to use MTL145 nickname in Project Kunai.
• Fixed connecting with Unreal Insights to games running under Proton.
• Added a warning that appears in Proton Log for systems that have low file descriptor limit (e.g. non-systemd distributions).
• Fixed video playback in One Finger Death Punch.
• Fixed Hell Yeah! Wrath of the Dead Rabbit crashing when reaching first boss.
• Updated Wine Mono to 9.2.0.
• Updated vkd3d-proton to v2.13-64-g47840a4bb614.
• Updated dxvk to v2.4-40-gd0ea5a4a87c9.
• Updated dxvk-nvapi to v0.7.1-19-gbd542144518d.

• Previously playable only with Proton Experimental:
  • Alpha League
  • Battlezone Gold Edition in VR mode
  • Black Desert Online
  • FreestyleFootball R
  • Helldivers 2
  • Hero's Land
  • Iragon
  • SimCity 3000 Unlimited
  • Warlords Battlecry III
• Enabled controller support via Xalia in the launchers of:
  • Clustertruck
  • Fallout 3 (standard and GOTY edition) - partial support only
  • Fallout 4
  • Mugsters
  • The Elder Scrolls V: Skyrim (72850)
  • The Elder Scrolls V: Skyrim Special Edition
  • Tomb Raider: Anniversary
  • Tomb Raider: Legend
• Limited number of cores seen by the following games making them playable on a high core count CPUs:
  • Call of Juarez: Gunslinger
  • Command & Conquer and The Covert Operations
• Fixed Ghost of Tsushima and Horizon Forbidden West displaying a warning about outdated drivers with Nvidia GPUs.
• Fixed The Finals crashing on launch after a recent game update.
• Fixed The Finals wrongly detecting button mashing.
• Fixed The Finals not working on machines supporting AVX512 without clearcpuid=304 in the kernel command line.
• Fixed Apex Legends not starting after a recent game update.
• Fixed Tekken 8 reporting wrong connection type if both WiFi and Ethernet are present.
• Fixed Ubisoft Launcher not starting games with a fresh Proton prefix.
• Fixed Halo Infinite crashing randomly during "initializing data".
• Fixed Beat Saber not being playable on Nvidia GPUs without using the legacy branch.
• Fixed Marvel vs Capcom: Infinite crashing when creating multiplayer lobby.
• Fixed hosting multiplayer games in Foundry.
• Fixed rendering of Japanese characters in the launcher of Granado Espada Japan.
• Fixed Nightingale not being able to authenticate with Steam on desktop.
• Fixed Bloons Monkey City thinking it's offline with IPv6 support disabled.
• Fixed Ubisoft Launcher asking for serial number on the first launch of Tom Clancy's Ghost Recon: Future Soldier.
• Fixed Descent 3 not working in GL mode.
• Fixed Shatterline freezing on loading screen when trying to join a second online match in a session.
• Fixed Call of Juarez: Bound in Blood failing to launch on a fresh prefix and failing on NVIDIA GPUs.
• Fixed audio stutter in Viking: Battle for Asgard.
• Fixed Russian language rendering in Brothers: A Tale of Two Sons launcher.
• Fixed scaling in The Desolate Hope when playing on desktop.
• Improved controller input support for Tower Princess.
• Improved performance in We Love Katamari REROLL+ Royal Reverie.
• Fixed GRIS showing error window when exiting the game.
• Fixed issues with transparency in Akka Arrh.
• Fixed load / save dialogs not working in Idle Spiral on Steam Deck.
• Added raw HID support for VKB Gunfighter SCG.
• Fixed random crashes in Cosmoteer Starship Architect & Commander.
• Fixed font rendering in Cosmoteer Starship Architect & Commander on Steam Deck.
• Improved Chinese font rendering in Cosmoteer Starship Architect & Commander.
• Fixed Russian and Hebrew font rendering in Simon the Sorcerer: 25th Anniversary Edition.
• Improved font rendering in Alien Swarm: Reactive Drop on Steam Deck.
• Fixed Cities: Skylines not being playable on Intel GPUs.
• Improved compatibility with OpenComposite.
• Updated support for OpenXR to version 1.1.36.
• Updated OpenVR support to v2.2.3.
• Updated vkd3d-proton to v2.12-58-gf6d39052afb1.
• Updated dxvk to v2.3.1-64-g60cfafe.
• Updated dxvk-nvapi to v0.7.0-7-gaae4902b6ff7.
• Updated Wine Mono to version 9.1.0.

• Previously playable only with Proton Experimental:
  • Dinogen Online
  • Photography Simulator Demo
  • George McGeehan Gamer Hero
  • The Finals
  • True Reporter. Mystery of Mistwood
  • Road to Vostok Demo
  • WITCH ON THE HOLY NIGHT
  • Lord of the Rings: Gollum
  • Sonic Colors: Ultimate
  • Command & Conquer: Red Alert 2 and Yuri’s Revenge
  • Command & Conquer Tiberian Sun and Firestorm
  • Aisling and the Tavern of Elves
  • Snares of Ruin 2
  • Insanity's Blade
  • Bloody Walls
• Limited number of cores seen by the following games making them playable on a high core count CPUs:
  • Far Cry 2
  • Far Cry 4
  • The Witcher 2: Assassins of Kings Enhanced Edition
  • Lara Croft and the Guardian of Light
  • Warhammer 40,000: Space Marine
  • Warhammer 40,000: Dawn of War II
  • Warhammer 40,000: Dawn of War II - Chaos Rising
  • Warhammer 40,000: Dawn of War II - Retribution
  • Outcast - Second Contact
  • Prototype
• Enabled nvapi by default for most games.
• Started ignoring system mouse acceleration in games using raw input API.
• Fixed Brawhalla showing a security certificate warning.
• Fixed audio in BOOMEROAD, DORONKO WANKO, NOTTOLOT.
• Fixed Civilization V Touch Only option in the launcher not working.
• Improved cutscene synchronization in Immortals Fenyx Rising.
• Fixed TouHou Makuka Sai ~ Fantastic Danmaku Festival Part I and II crashing during boss fights.
• Fixed crash in Disaster Report 4: Summer Memories epilogue.
• Improved video playback in BIOMUTANT.
• Fixed Imperiums: Greek Wars launcher.
• Fixed memory leaks that caused Final Fantasy XIV Online launcher crash over long time.
• Fixed crash in Microsoft Flight Simulator when live weather is enabled.
• Improved support for input devices with 8+ axes.
• Fixed Savant - Ascent REMIX hitching during certain animations.
• Fixed Super Robot Wars 30 crashing with languages other than English.
• Fixed Doom Eternal audio crackling on certain setups.
• Fixed Lethal Company, Phasmophobia and other Unity games crashing when a controller with a hat switch is plugged in.
• Improved video playback for the following titles: Lords of the Fallen, Harvestella, Wayfinder, Sea of Thieves, and KING OF FIGHTERS XV.
• Fixed default scaling for The Last Game on Steam Deck.
• Fixed audio issues when playing intro video in Airborne Kingdom.
• Fixed Bayonetta crashing on certain systems.
• Fixed Escape from Monkey Island getting minimized on a mouse click.
• Fixed audio controls and spatialization in VRChat with AVPro.
• Fixed new prefix failing to initialize on filesystem that do not support copy_file_range syscall.
• Updated file distribution method to save disk space.
• Rebased on top of upstream Wine 9.0.
• Updated vkd3d-proton to v2.11.1-49-g32ff676b.
• Updated dxvk to v2.3-47-ge2a46a34.
• Updated dxvk-nvapi to v0.6.4-48-g0951afb.
• Added support for Steamworks SDK 1.59.

• Previously playable only with Proton Experimental: Sonic Colors: Ultimate, Command & Conquer: Red Alert 2 and Yuri’s Revenge, Command & Conquer Tiberian Sun and Firestorm, Aisling and the Tavern of Elves, Snares of Ruin 2, Insanity's Blade, Bloody Walls.
• Fixed Proton 9.0 regressions:
  • Overwatch 2 no longer randomly crashes.
  • Video playback in Age of Empires II: Definitive Edition works again.
  • Total War: WARHAMMER II no longer has clicking audio while playing videos.
  • Call of Juarez: Gunslinger no longer crashes on start.
  • Sea of Thieves is able to play videos on Steam Deck.
  • Borderlands GOTY Enhanced is playable again.
  • Mars First Logistics is now able to upload to Steam Workshop.
  • Neverwinter, Star Trek Online and Champions Online are playable again on Nvidia setups.
  • Fixed input issues with Worms Armageddon.
  • Main menu video is looping correctly in Call of Cthulhu.
• Fixed audio in BOOMEROAD, DORONKO WANKO, NOTTOLOT.
• Fixed Civilization V Touch Only option in the launcher not working.
• Improved cutscene desync in Immortals Fenyx Rising.
• Limited number of cores seen by the following games making them playable on a high core count CPUs:
  • Far Cry 2
  • Far Cry 4
  • The Witcher 2: Assassins of Kings Enhanced Edition
  • Lara Croft and the Guardian of Light
  • Warhammer 40,000: Space Marine
  • Warhammer 40,000: Dawn of War II
  • Warhammer 40,000: Dawn of War II - Chaos Rising
  • Warhammer 40,000: Dawn of War II - Retribution
  • Outcast - Second Contact
  • Prototype

• Fixed Proton 9.0 regressions:
  • Command & Conquer Red Alert is playable again.
  • Carmageddon: Max Damage is playable again.
  • Fixed Risk of Rain 2 being unable to start a multiplayer lobby.
  • DayZ is able to connect to servers again.
  • The Last Of Us Part I no longer drops FPS when using mouse.
  • Trove no longer crashes when going through inventory.
• Fixed new prefix failing to initialize on filesystem that do not support copy_file_range systemcall.
• Added support for Steamworks SDK 1.59.

Fixed a few Proton 9.0 regressions:

• Alan Wake, Divinity: Original Sin 2 - Definitive Edition, Total War: WARHAMMER III (#23474) are playable again.
• Placeholder videos now play correctly in Ultimate Marvel VS. Capcom 3 and Resident Evil 0.
• Fixed mouse clicks registering twice in Warframe and TrackMania Nations Forever.
• Epic Game Store no longer fails to launch.

Fixed 9.0 regressions:

• DEATHLOOP no longer displays APU warning and is playable on Steam Decks. (#23489)
• X input system mouse mappings take effect. (#23502)
• Warhammer 40k Darktide is playable with AMD GPUs. (#23474)