ISA Matters: Valve developers have been working hard to finalize the software stack for the upcoming Steam Frame. 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. 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. Lepton, Proton, and FEX are expected to handle game compatibility within the Steam Frame ecosystem.