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Proton 9.0 Beta updated and nearing release for Linux / Steam Deck

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Valve has pushed out what they're calling Proton 9.0 (Release Candidate 2), with a whole bunch of improvements for gaming on Linux Desktop and Steam Deck. It will show up as Proton 9.0 (Beta) in your Steam library for now and once it gets to the final 9.0 release, it will become the main stable version of Proton.

Here's all the changes:

  • 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 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

Pictured - The Witcher 2: Assassins of Kings Enhanced Edition

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I am the owner of GamingOnLinux. After discovering Linux back in the days of Mandrake in 2003, I constantly came back to check on the progress of Linux until Ubuntu appeared on the scene and it helped me to really love it. You can reach me easily by emailing GamingOnLinux directly.
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sudoer Apr 28
QuoteLimited number of cores seen by the following games making them playable on a high core count CPUs:

Warhammer 40,000: Dawn of War II - Retribution

Just tried that, didn't work ouf of the box :/
rustigsmed Apr 29
ahh yes the limited cores situation. had that issue with witcher 2 but running a vm in the background with the appropriate number of cores allocated does the trick.
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