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Valve has released a fresh Proton Experimental release for November 15th so here's your run over what's new and improved.

Noted as newly playable are:

  • Assassin's Creed Mirage.
  • Tenioha! feat. Mami.
  • Killsquad.

Interesting that Valve notes Assassin's Creed Mirage as now playable, since it's not currently available on Steam. That hasn't stopped gamers though of course. People have been playing it on Steam Deck and desktop Linux with other methods like Heroic Games Launcher and NonSteamLaunchers.

Bug fixes:

  • Fixed swapped start / select buttons on controllers in Starfield and other games using Windows.Gaming.Input.
  • Fixed triple monitor handling in Project Cars 3 and Project Cars 2.
  • Fixed load / save dialogs not working in Idle Spiral on Steam Deck.
  • Proton 8 regression fix: games should be able to switch monitors in fullscreen mode on Cinnamon DE again.

Changelog can be seen here.

It will just show up in your Steam Downloads as an update for Proton Experimental, as Proton updates just like games do, so keep an eye out for it. Want more info about Steam Play and Proton? Check out my beginner's guide.

How to change your Proton version:

Steam Deck:

  • Pick a game in your Library and head to the little cog icon on the right.
  • Click Properties, then Compatibility on the left.
  • Make sure the tickbox is done, then select Proton Experimental from the dropdown.

On a Linux desktop:

  • Right click a game, go to Properties.
  • Compatibility on the left.
  • Make sure the tickbox is done, then select Proton Experimental from the dropdown.

Let me know what you think in the comments.

Article taken from GamingOnLinux.com.
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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. Find me on Mastodon.
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Phlebiac Nov 16
It is pretty awesome that Valve devotes time to fixing non-Steam games too.
Also, I guess Valve knows a lot of people use the Deck for JRPG and VNs if they keep bothering to mention them in release notes
lejimster Nov 16
It makes sense to fix non-steam games because they may very well be on steam in the future. Valve also want Linux to be a viable alternative to Windows so they would be happy to see other studios join in. I predict if the steam deck keeps succeeding and growing we will see more native launchers for Linux.
Jarmer Nov 22
At first, Mirage worked out of the box with expiremental on steam, but then the 1.05 update from ubi broke it. You'd get a crash error about not recognizing the gpu or something like that. Within about 24-48 hrs though, there were posts about how to add startup commands to force it to recognize the gpu and launch, and that worked for me. Been using those flags ever since. I suppose now I can remove them.

Or ... not ... the game isn't all that good. I probably won't play it much longer. It's nice to see the back to its stealthy origins, I like the removal of the actionrpg elements, but outside of that it feels very clunky and outdated. Mostly I think their engine is SUPER outdated when it comes to traversing the open world in parkour mode. Basim CONSTANTLY gets stuck on ledges, won't jump where you obviously want him to, will jump where you obviously don't want him to, gets stuck on enemies instead of running by them, gets trapped between two climbable elements therefore not climbing either one, etc etc etc.
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