Valve has released the release candidate for Proton 10.0-3 for testing, which aims to improve PC game performance on Linux and the Steam Deck. The new build is available as a beta branch in the Steam client, allowing users to test its features. Proton 10.0-3 includes numerous fixes and improvements, enabling previously unplayable games like Mary Skelter: Nightmares and Grim Fandango Remastered to run smoothly. The release also stabilizes previously implemented fixes through Proton Experimental or Hotfix, making it a significant step forward in Valve's goal of seamless gaming on different platforms.

Proton 10.0-3 RC released

Valve has released the release candidate for Proton 10.0-3. This release represents significant progress in Valve's efforts to improve the performance of PC games on Linux and the Steam Deck. The release is now available as a beta branch in the Steam client, which lets users choose to test the newest features.

To get to the Proton 10.0 app and start testing the new build, go to your Steam Library, right-click on "Proton 10.0", choose Properties, and then click on the BETAS tab. You can turn on the 10.0-3 Release Candidates here, but keep in mind that the name that shows up in the Steam Settings dialog may not be up to date.

This platform will update users about changes and fixes made during the release candidate phase as new builds become available. You can find the source code for the latest RC build in the proton_10.0-rc branch of this repository. This branch may need to be force pushed from time to time.

Before you send in a report about problems with the 10.0-3 Release Candidates, you need to verify that the problem doesn't happen with the previous version (Proton 10.0-2). This makes sure that only new problems that are unique to the RC builds are fixed.

Valve's QA team still needs to review the changelog for this release. However, the final release may undergo changes due to the addition or removal of new features during testing.

There are many fixes and improvements in Proton 10.0-3 Release Candidate for several games, including:

Now you can play some games that you couldn't before, like Mary Skelter: Nightmares, Fairy Fencer F Advent Dark Force, Grim Fandango Remastered (which works with AMD and Intel GPUs), and many more. Other significant changes include fixing problems with OpenSSL in Agony UNRATED on newer Intel CPUs and making The Quarry playable on OLED Steam Decks.

This release also stabilizes several fixes previously implemented through Proton Experimental or Hotfix. This makes sure that these changes are thoroughly tested and improved. The majority of the fixes were first released through these channels, and the 10.0-3 RC build was the result of a lot of testing on Steam Decks.

This release covers a few important topics, such as

• This release enhances compatibility with a wide range of games, including those that were previously unplayable or experiencing issues.
• Fixes for specific problems in titles like Agony UNRATED, The Quarry, and Warhammer 40,000: Dakka Squadron - Flyboyz Edition.
• Mitigation of OpenSSL-related issues on newer Intel CPUs.
• Stabilization of previously deployed fixes through Proton Experimental or Hotfix.

Along with these changes, the release also updates several key components:

• Wine Mono has been updated to version 10.2.0.
• DXVK has been upgraded to v2.6.2-22-g22d2d2d2efd3.
• vkd3d-proton now runs on v2.14.1-454-g105417aa2e93.
• dxvk-nvapi has been updated to v0.9.0-10-g0ea231734d60.
• vkd3d has been upgraded to vkd3d-1.17-291-gcd64aa69c886.

The Proton 10.0-3 Release Candidate is a big step forward for Valve in their ongoing goal of making gaming on different platforms, like Linux and Steam Deck, as smooth as possible.