Valve reveals it’s the architect behind a push to bring Windows games to Arm

Summary

It’s a big deal that Valve is making a game console. But I’m beginning to think the Steam Machine may end up a footnote in gaming history. What if Valve could bring PC games not just to its own living room consoles, but also to the Arm chips that billions of people have in their phones? What if you no longer had to wait for game developers to do the hard work of porting PC games to your phone, Mac, or other Arm hardware, because games built for desktop PCs could just work?If you wrote off the Steam Frame as yet another VR headset few will want to wear, I guarantee you’re not alone. But the Steam Frame isn’t just a headset; it’s a Trojan horse that contains the tech gamers need to play Steam games on the next Samsung Galaxy, the next Google Pixel, perhaps Arm gaming notebooks to come.I know, because I’m already using that tech on my Samsung Galaxy. There is no official Android version of Hollow Knight: Silksong, one of the best games of 2025, but that doesn’t have to stop you anymore. Thanks to a stack of open-source technologies, including a compatibility layer called Proton and an emulator called Fex, games that were developed for x86-based Windows PCs can now run on Linux-based phones with the Arm processor architecture. With Proton, the Steam Deck could already do the Windows-to-Linux part; now, Fex is bridging x86 and Arm, too.This stack is what powers the Steam Frame’s own ability to play Windows games, of course, and it was widely reported that Valve is using the open-source Fex emulator to make it happen.What wasn’t widely reported: Valve is behind Fex itself.In an interview, Valve’s Pierre-Loup Griffais, one of the architects behind SteamOS and the Steam Deck, tells The Verge that Valve has been quietly funding almost all the open-source technologies required to play Windows games on Arm. And because they’re open-source, Valve is effectively shepherding a future where Arm phones, laptops, and desktops could freely do the same. He says the company believes ga...