Steam shown running on Nintendo Switch thanks to latest Proton Beta — FEX 2604 translates x86 to ARM-friendly instructions on Linux

Valve has released Proton 11.0-Beta1, but this perhaps inconsequential-sounding test version comes with something revolutionary – support for Arm Linux devices. It isn’t mainstream yet; it is a beta version, of course, but folks have already shown off the Steam UI running on a Nintendo Switch. So, Steam gaming support on more open gaming devices from brands like Retroid, AYN, and Ayaneo should be far easier.

Steam Linux ARM64 beta on Switch

Steam Linux ARM64 beta running on Ubuntu Linux Noble Numbat on Nintendo’s popular handheld.

AAGaming, which posted the Steam on Switch demo on BlueSky, embedded above, says they have shared “a working copy of proton arm + steamrt arm that you can drop right into conpatibilitytools.d to play games with this client.”

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You can find the official Proton 11.0-Beta1 release on Valve’s Proton GitHub, alongside some release notes. The key change, as far as Arm gamers are concerned, is flagged in a section under the heading ARM64 Builds. Not much is said, but handheld gaming enthusiasts on social media have been quick to realize the implications. The newly bundled FEX 2604 can enable Steam’s built-in x86 Windows to ARM Linux gaming compatibility on your Arm Linux device.

This new Arm Linux compatibility for Steam is thought to have been implemented now to prepare for the Arm-powered Steam Frame gaming headset, which we went hands-on with last November. That headset was described as a ‘streaming-first device’ but packs very respectable Arm mobile hardware, such as a Qualcomm Snapdragon 8 Gen 3 backed with 16GB LPDDR5X.

During our Steam Frame hands-on, we also learned about FEX bringing Steam games to Arm and running locally. In our demo, we saw the x86 version of Hades 2 running standalone with respectable performance at 1400p. The Valve rep clarified, “It’s actually running on Linux, running on Arm,” at the time. So, now we are seeing this ability surfacing in public betas, and already being used to get Steam OS and games running on alternative Arm hardware.

Valve is building a ‘Verified’ style list for the Steam Frame Arm hardware, much like its efforts seen on Steam Deck. Thus, users will know which games will run well locally and which they might prefer to stream from their gaming PCs.

Not interested in Arm? There's more...

In addition to the juicy Arm/Linux compatibility news, the new Proton 11 Beta includes goodies for existing Steam OS gamers. There’s a host of new certified playable titles for users, such as titles from the Resident Evil and Dino Crisis stables, plus Warhammer: Vermintide 2, SHOGUN: Total War, Breath of Fire IV, and more.

Numerous bug fixes are implemented in the release, too. For example, Valve has fixed Steam Overlay not working correctly with many EA games, and got the intro video playback in Crimson Desert to work properly.

Getting Proton 11 is easier if you already have a Steam OS device like the Deck. Just search for the update in the Steam Library.

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