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As we speculated previously, Valve have now officially announced their new version of 'Steam Play' for Linux gaming using a modified distribution of Wine called Proton, which is available on GitHub.

What does it do? In short: it allows you to play Windows games on Linux, directly through the Steam client as if they were a Linux game.

What many people suspected turned out to be true, DXVK development was actually funded by Valve. They actually employed the DXVK developer since February 2018. On top of that, they also helped to fund: vkd3d (Direct3D 12 implementation based on Vulkan), OpenVR and Steamworks native API bridges, wined3d performance and functionality fixes for Direct3D 9 and Direct3D 11 and more.

The amount of work that has gone into this—it's ridiculous.

Here's what they say it improves:

  • Windows games with no Linux version currently available can now be installed and run directly from the Linux Steam client, complete with native Steamworks and OpenVR support.
  • DirectX 11 and 12 implementations are now based on Vulkan, resulting in improved game compatibility and reduced performance impact.
  • Fullscreen support has been improved: fullscreen games will be seamlessly stretched to the desired display without interfering with the native monitor resolution or requiring the use of a virtual desktop.
  • Improved game controller support: games will automatically recognize all controllers supported by Steam. Expect more out-of-the-box controller compatibility than even the original version of the game.
  • Performance for multi-threaded games has been greatly improved compared to vanilla Wine.

It currently has a limited set of games that are supported, but even so it's quite an impressive list that they're putting out there. Which includes DOOM, FINAL FANTASY VI, Into The Breach, NieR: Automata, S.T.A.L.K.E.R.: Shadow of Chernobyl, Star Wars: Battlefront 2 and more. They will enable many more titles as progress on it all continues.

To be clear, this is available right now. To get it, you need to be in the Steam Client Beta.

There will be drawbacks, like possible performance issues and games that rely on some DRM might likely never be supported, but even so the amount of possibilities this opens up has literally split my head open with Thor's mighty hammer.

Read more here.

Holy shit. Please excuse the language, but honestly, I'm physically shaking right now I don't quite know how to process this.

Update #1: I spoke to Valve earlier, about how buying Windows games to play with this system counts, they said this:

Hey Liam, the normal algorithm is in effect, so if at the end of the two weeks you have more playtime on Linux, it'll be a Linux sale. Proton counts as Linux.

158 Likes, Who?
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606 comments
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dubigrasu 22 August 2018 at 5:25 am UTC
chancho_zombiehey guys. Where does proton creates the bottles? I need to recreate the bottle to try without installing some dotnet cruft.
I guess all the games are 600mb fatter (that's what wine bottles take for system files)
There's a "compatdata" folder in "steamapps".
crt0mega 22 August 2018 at 5:27 am UTC
Jesus f*cking christ. I'll keep my wineprefix with Gallium-Nine for obvious reasons but this is great news for all these D3D11 games I grabbed with some bundles.

Praise the Gaben!

image
Patola 22 August 2018 at 5:28 am UTC
Shmerl
Comandante ÑoñardoI suggest to make a list in this website with the games that works flawlessly with Proton.

That's not useful outside of Steam though. Better make a list that benefits from esync for instance. There is one for dxvk already.
Why not? I couldn't find any proprietary component in Proton, which is in github. You can use it standalone to play games.
evergreen 22 August 2018 at 5:30 am UTC
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So if now linux gaming users don't grow...
Shmerl 22 August 2018 at 5:36 am UTC
PatolaWhy not? I couldn't find any proprietary component in Proton, which is in github. You can use it standalone to play games.

I guess because there are some games that for example can benefit from dxvk but not from esync or the other way around. So a particular list has value.
jarhead_h 22 August 2018 at 5:36 am UTC
Something that I noticed on the page that I found very telling:
QuoteQ: I'm a developer; I wasn't planning on targeting Linux, how can I best leverage the new Steam Play?

We recommend you target Vulkan natively in order to offer the best possible performance on all platforms, or at least offer it as an option if possible. It's also a good idea to avoid any invasive third-party DRM middleware, as they sometimes prevent compatibility features from working as intended.

So Vulkan is definitely our way forward. Valve is saying as much, if you want to Linux sales without having to port, go with Vulkan. And that is an absolutely terrific first step. The cost difference in porting a DirectX game to Linux versus a Vulkan title is night and day because there's just so much less to do on the Vulkan game. That's our foot in the door.

As for the Steam Play Beta client, it's glitchy. Right now the storefront won't display. Most of the games Aren't working yet. Installing Alan Wake as I type this.

Not Working for Me:
Far Cry 2(buggy but started on with display options all turned down to low. Also didn't want to uninstall)
Far Cry 3
Batman Arkham Asylum GOTY

Working:
F.E.A.R.(flawless)


Last edited by jarhead_h at 22 August 2018 at 5:39 am UTC
lucifertdark 22 August 2018 at 5:45 am UTC
legluondunetFirst Steam Play game installed: Ultimate Doom installs and launches, no crash, no bug. It uses a dosbox with a steam overlay.
I had the same thing, restarted Steam & it now works perfectly, just got to remember how to adjust the resolution.

Doom 2, Ultimate Doom & Quake all work so far, haven't had a chance to try anything else yet, but I'm going to.


Last edited by lucifertdark at 22 August 2018 at 5:52 am UTC
lucifertdark 22 August 2018 at 6:24 am UTC
chancho_zombiehey guys. Where does proton creates the bottles? I need to recreate the bottle to try without installing some dotnet cruft.
I guess all the games are 600mb fatter (that's what wine bottles take for system files)
According to my system Proton is 1.7Gb & the compdata folders for each game are 44Mb, instead of having a separate Wine bottle for each game they have one wine install that all games link to. Much better than a separate bottle for each game.

Apart from hitting the button to enable all games does anyone know how to add games to the list of compatible games as they are tested? is it something we can do ourselves or are we waiting for Valve to add them for us?


Last edited by lucifertdark at 22 August 2018 at 6:31 am UTC
Ne0 22 August 2018 at 6:35 am UTC
21 pages in 9 hours ? WOW !
This is a SUPER HOT thread !

My WishList for Proton:
  • Tropico 5
  • Path of Exile
  • Alien Swarm

lucifertdarkApart from hitting the button to enable all games does anyone know how to add games to the list of compatible games as they are tested? is it something we can do ourselves or are we waiting for Valve to add them for us?

QuoteWe will be enabling more titles in the near future as testing results and development efforts progress; in the meantime, enthusiast users are also able to try playing non-whitelisted games using an override switch in the Steam client. Going forward, users can vote for their favorite games to be considered for Steam Play using platform wishlisting
.


Last edited by Ne0 at 22 August 2018 at 6:38 am UTC. Edited 3 times.
Beamboom 22 August 2018 at 6:37 am UTC
There's nothing I can say here that's not already said.

I'll just go in a corner and faint for a while.
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