Proton 11 ARM: Steam runs on Nintendo Switch, and that changes everything for retro handhelds
Valve just dropped a quiet bomb. The Proton 11.0-Beta1 version, released on April 16, 2026, brings a feature that looks like nothing in the release notes but which immediately ignited the handheld community: the native ARM64 support. And the demo followed in the hours that followed.
🎮 Steam on Nintendo Switch, the proof of concept
The modder @aagaming (Bluesky/Decky Plugin Framework) posted a video showing the Steam Linux ARM64 client running on an original Nintendo Switch running Ubuntu Linux Noble Numbat. The video is short but the message is clear: Steam runs on one of the most common ARM devices in the world.
The mechanism behind: Proton 11.0-Beta1 integrates FEX-2604, an open source emulator that translates x86 Windows instructions for ARM Linux architectures. Valve has already been using FEX for a while for the Steam Deck, but this is the first time that this brick has been available in ARM64 form.
⚙️ The real limits (honesty required)
auto;">On Switch 1 specifically, the limitations are real. The Linux kernel of the original console is too old to support full FEX mode, which means that x86 Windows games will not run well. On the other hand, native Linux ARM games play without problem... except that there are almost none on Steam. style="user-select: auto;">@aagaming also specifies that he has not yet tried to launch real games, just to check that Steam is running. But it has made available a working copy of Proton ARM + SteamRT ARM for those who want to test.
💥 What really matters: the implications for all ARM handhelds
The stakes are not limited to the Switch. There are in 2026 tens of thousands of ARM handhelds in the hands of retro gamers, Retroid Pocket 6, AYN Odin 3, AYANEO Pocket Air Mini and many others. All of these Android devices can potentially benefit from Proton 11 ARM to access Steam PC games. The community has already begun testing, at AYN, Hollow Knight: Silksong is already running at over 100 FPS on an Odin 2 Portal with Proton 11 ARM.
Valve clearly developed this feature primarily for the Steam Frame, its Snapdragon 8 Gen 3 based ARM headset which is imminently launched. But by making Proton ARM public in beta, the door is open to the entire non-x86 handheld ecosystem.
🔮 What this means for retroemulation
Eventually, an Android ARM handheld could run PC emulators like MAME, RetroArch PC, or even Windows builds of emulators not natively ported to Android,via the Proton/FEX translation layer. It’s still experimental, but the direction is clear. The line between “handheld retro Android” and “mini pocket PC” continues to blur.
Sources: Tom's Hardware, SteamDeckHQ, NotebookCheck, XDA Developers