Valve updates Proton Experimental with Arm64 versions in Wine Mono 11.3.0 and Xalia 0.5.0

Valve has already launched all the hardware that it announced at the end of 2025, the Steam Controller as a complementary gamepad to the Steam Machine and Steam Frame. These use the SteamOS operating system that has reaped part of the success that these devices are having together with the Steam Deck. For this reason, Valve continues to improve this Linux-based gaming operating system and has now added Wine Mono 11.3.0 and Xalia 0.5.0 on Proton Experimental.

Proton Experimental adds Arm64 support with Wine Mono 11.3.0 and Xalia 0.5.0

Proton is the layer in charge of translating games for x86 and now also incorporates a version for Arm64 that have been added in this latest update. An update that adds the latest versions of Wine Mono 11.3.0which offers support for .NET Framework applications with a build also for Arm64, and Xalia 0.5.0 it simply adds its own version for Arm64. Xalia is an application that helps users navigate the interface with the controller, and in this version some errors have been corrected.

Proton fixes issues with Deus Ex: Mankind Divided and other games

Among the changes registered, a problem that prevented running Deus Ex: Mankind Divided when it had an AMD GPU, like the one in the Steam Machine. Ragnarok: The New World It has also been corrected and now allows it to be played on hardware other than the Steam Deck.

Other minor changes have been included that you can find in the complete list that Valve has left, including video playback in Making Lovers or entering Japanese characters in Winning Post 9. Despite this, the changelog does not specify anything about the Steam Frame that have a processor with Arm architecture.