Valve Has Quietly Funded Multiple Open Source Programs Needed To Run Windows Games On Phones

Hayley Williams
12/3/2025

It may come as no surprise that Valve has invested in emulation tech for Arm-based hardware, having just announced its first device running an Arm chip. But beyond its own hardware, Valve's support of open-source emulation projects may have laid the groundwork for playing your favorite PC games on Arm devices like mobiles and tablets--no ports necessary.Valve's upcoming Steam Frame headset is the company's first Arm-based device, making use of the open-source FEX emulator to run Windows-native games. As it turns out, Valve has had more of a hand in FEX's development than it initially appeared. In an interview with The Verge, Valve engineer Pierre-Loup Griffais revealed that Valve actually initiated the FEX project, and has been largely responsible for its development."We were talking with a few developers that we knew were the right fit for an undertaking like that, a long-term thing that needed a very specific set of experts," Griffais explained. "We worked hard on trying to convince these guys to start the project, and have been funding them ever since."Continue Reading at GameSpot...

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