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ISA Matters: Valve developers have been working hard to finalize the software stack for the upcoming Steam Frame. Despite using an Arm-based processor, the VR headset is expected to support both PC and Android games thanks to a complex compatibility layer.
Valve recently updated the Steam pages for Lepton and FEX, two tools designed to improve compatibility between the popular PC gaming platform and Arm-based devices. The tools are expected to play a major role in turning the upcoming Steam Frame into a "real" gaming headset from the get-go.
Lepton and FEX still lack public store pages on Steam, but their update histories can be viewed through SteamDB's archive. The first hints about Lepton appeared online in 2025, suggesting that Valve was embarking on yet another major compatibility project. Just as Proton acts as a compatibility layer for Windows games on Linux using Wine, Lepton is expected to leverage the container-based Waydroid system to run Android apps on a full Linux distribution.
