A modder known as "AAGaming," who is a developer for the popular Decky Plugin Framework, has successfully installed and launched the native "ARM64 Steam Linux" client on an original Nintendo Switch console. This was demonstrated in a video posted to 'Bluesky" on April 16–17, 2026, showing the Switch booting directly into Steam Game Mode, which is the very same interface familiar to Steam Deck users, without any hardware modifications to the console itself.
The hacked console, running Ubuntu 24.04.2 LTS (Noble Numbat), leverages Steam's built-in x86 Windows-to-ARM Linux wrapper to bring the full Steam interface to a device built around NVIDIA's Tegra X1 ARM-based system-on-chip (SoC), which was originally released in 2015.
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This milestone was made possible by Valve's release of Proton 11.0-Beta1, which, for the first time, ships an official ARM64 build of the compatibility layer alongside the bundled FEX-2604 translation engine. FEX (Fast x86 Emulator) is an open-source, high-performance user-space emulator that translates x86_64 instructions into ARM-native instructions on-the-fly, enabling the ARM hardware to run software originally compiled for Intel or AMD processors.
So, you can now fire up the Steam client on a Linux ARM device, not just a Nintendo Switch, but potentially any ARM-based handheld, laptop, or single-board computer, and interact with Steam natively. AAGaming confirmed that the Steam interface loads and is fully navigable, even noting that the modder shared a "working copy of proton arm + steamrt arm that you can drop right into compatibilitytools.d" for others to try.
The process, however, is not yet plug-and-play. AAGaming also described it as quite difficult to replicate at this stage: the correct manifest had to be located, multiple zip archives downloaded and extracted in a specific order over each other, and a custom launch script created.
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No games have been successfully launched yet on the Switch itself, partly because the original Switch's Linux kernel is too old to fully support the FEX's requirements. Real-world game performance also remains unknown.
"This is a huge step towards SteamOS on ARM devices. Steam Linux ARM64 beta is now running on Ubuntu Linux Noble Numbat on Nintendo's popular handheld — and it's incredible."
— Steam Deck HQ
ARM-based gaming handhelds from manufacturers like Retroid, AYN, and Ayaneo, which are based on modern "Qualcomm" and "MediaTek ARM" chips, are now plausible candidates for running the full Steam ecosystem natively. These devices previously were technically capable of running Linux, but lacked the compatibility layers to make the vast Steam library accessible.
Proton 11.0-Beta1, FEX 2604, and the Architecture Behind ARM64 Steam Gaming:
Valve's Proton 11.0-Beta1, which was released in mid-April 2026, appears on its surface to be a routine compatibility update, but buried in its release notes is a single line that rewrites the rules for Linux gaming on ARM: "Added FEX-2604 for ARM64EC builds."
That one patch note is the foundation for everything described above. Proton is Valve's compatibility layer for Steam, built on top of "Wine" (which is a Windows API translation environment for Linux). It allows Windows-native games to run on Linux by translating Windows system calls into Linux equivalents. Proton 11.0-Beta1 is based on "Wine 11" and introduces several headline improvements.
Speaking of improvements, we are talking about: support for the NTSync kernel driver (which can deliver up to 600% performance improvements in certain multithreaded scenarios previously bottlenecked by synchronization), better gamepad support through an updated Xalia integration, improved GPU utilization, and more stable multi-monitor and scaling behavior.
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FEX is a high-performance, user-space emulator that translates x86_64 CPU instructions into equivalent ARM instructions on-the-fly, in real time. It is an open-source and has been funded by Valve since its early development. Getting x86 game code to execute on ARM processor hardware is entirely a separate challenge. So, this is where "FEX," which is the Fast x86 Emulator, enters the process.
Crucially, FEX does not emulate an entire system; it runs natively on Linux and intercepts only the processor-level instructions that need to be converted, making it far more efficient than traditional full-system emulation approaches.
The specific version bundled with Proton 11.0-Beta1 is FEX-2604, which was a release that targeted squarely at improving memory efficiency and enhancing x87 transcendental function performance. This is particularly important because most budget and mid-range ARM handhelds, including those from "Retroid" and the "Odin 2," top out at 8 GB to 12 GB of RAM.
Questions For You:
- What is the very first 'Verified' Steam game you’d try to boot on your Switch?
- Would you risk a Nintendo ban for the chance to turn your Switch into a mini Linux PC?
- Does this mod prove that the Switch 2 must have some form of official PC compatibility?
Let me know in the comments, where you can also provide the latest news so I can make a breakdown of it.