SteamOS on non-Deck hardware: what it means for PCs in 2026

For years SteamOS was, in practical terms, the operating system that shipped on the Steam Deck. Anyone else who wanted the same experience had to install HoloISO or rely on Bazzite, both community projects with their own quirks. That situation has changed. Valve has begun licensing SteamOS to third party hardware makers, and 2026 is the first year buyers can walk into the market and pick a non Deck device that runs the real thing, signed and supported.

This shifts the question for a lot of PC buyers. If you want a small, quiet, gaming focused Linux box for the living room, or a handheld that is not locked to Windows 11, the answer no longer has to be "buy a Deck or build your own". It can be a Lenovo Legion Go S, an ASUS ROG Ally variant, or, more interestingly for anyone on a sensible budget, a compact mini PC.

What Valve actually announced

Valve confirmed the SteamOS 3 licensing programme in late 2025, with the Lenovo Legion Go S launching as the first officially sanctioned third party handheld carrying a factory SteamOS image. The company has since signalled that the same programme is open to mini PC and small form factor OEMs, provided the hardware meets a defined baseline for AMD graphics support, controller compatibility and power management.

The important detail is that this is a real SteamOS image, not a fork. It receives updates through Valve's own channel, ships with the Steam client integrated as the shell, and includes the Proton compatibility layer at the version Valve is currently shipping on Deck. That matters because it removes the drift problem that plagued community distributions, where Proton, Mesa and kernel versions could fall behind the Deck by weeks or months.

The anti-cheat picture in 2026

Anti-cheat is the single question that decides whether SteamOS on any hardware is viable for a given player. The state of play is better than it was, but it is still uneven.

Easy Anti-Cheat and BattlEye both support Proton and have done for some time, which means a large slice of the multiplayer catalogue runs cleanly. Apex Legends, Elden Ring's multiplayer, Deep Rock Galactic and most of the Total War multiplayer titles work without ceremony. The developer still has to tick the Proton box on their side, but where they have, it just works.

The stubborn holdouts are the kernel level systems. Riot's Vanguard, used by Valorant and now by League of Legends, does not run on Linux and Riot has been explicit that it will not. Activision's Ricochet, which guards modern Call of Duty, is in the same category. Fortnite remains off limits on SteamOS because Epic will not enable Easy Anti-Cheat for Proton on that title, even though the technology supports it.

The practical reading for a buyer in 2026: if your library is Steam first and you do not need Valorant, Fortnite or the latest Call of Duty, SteamOS is now a genuine daily driver. If those three titles are core to your play, you still want Windows.

Why a mini PC is the interesting target

Handhelds get most of the attention, but the mini PC form factor is arguably the better fit for SteamOS outside the Deck. A small AMD Ryzen box connected to a television, with a controller in hand and Big Picture as the shell, is exactly the use case Valve designed the interface around. There is no battery to manage, no 7 inch screen compromise, and the thermal envelope is far more forgiving, which means sustained performance rather than the throttled bursts a handheld delivers.

If you are considering that route, a Ryzen 5 or Ryzen 7 mini PC with 16GB or 32GB of DDR4 and a fast NVMe drive will comfortably run the SteamOS catalogue at 1080p, and will handle 1440p in a lot of titles once you set expectations sensibly. Have a look at the Birmingham AV mini PC on eBay for a sense of the price and spec range that makes sense here. The listing covers a range of CPU, RAM and storage variations, so you can size the box to your library rather than paying for headroom you will not use.

The point is not that this specific unit is the only sensible choice. It is that a refurbished small form factor PC in the £150 to £350 bracket is a far more rational SteamOS host than a £700 handheld if the device is going to sit under a television.

Installing SteamOS on hardware Valve did not ship

If you already own a mini PC and want to try SteamOS on it, the picture in 2026 is cleaner than it was. Valve released a generic SteamOS installer image in the spring, aimed at AMD based systems that meet the same baseline as the licensed devices. It is not officially supported in the sense that Valve will not troubleshoot your specific board, but the installer works, updates flow through the standard channel, and Proton behaves the same way it does on a Deck.

Intel integrated graphics remain a weak spot. The image will boot on many Intel systems but Mesa's Intel driver stack does not have the same level of gaming polish as the AMD side, and controller and sleep behaviour can be flaky. If you are buying specifically for SteamOS, an AMD APU is the sensible choice. Ryzen 5 5600G or Ryzen 7 5700G class chips, or the newer 7000 and 8000 series with Radeon 780M graphics, are the sweet spot for the money.

What this does not fix

SteamOS is not a magic layer. It will not run games that require kernel anti-cheat, it will not run titles the publisher has actively blocked on Proton, and it will not make a weak GPU strong. The Windows only catalogue of demanding singleplayer titles has shrunk sharply, thanks to Proton, but a handful of newer releases still ship with day one bugs on Linux that take a patch cycle to resolve. If you play those on release day, keep a Windows box in the mix.

The other honest caveat is that SteamOS is a Steam first environment by design. GOG, Epic and Xbox libraries can be run through Heroic or Lutris, and this works well, but it is not the one click experience Steam gives you. Set expectations accordingly.

Frequently asked questions

Can I dual boot SteamOS and Windows on a mini PC?

Yes, and this is a common setup. The SteamOS installer will detect an existing Windows partition and offer to install alongside it, provided you have free space on the drive. A 256GB or larger NVMe is the practical minimum for a comfortable dual boot with a modest game library on each side.

Will SteamOS run games I bought on Epic or GOG?

Not natively through the Steam client, but you can install Heroic Games Launcher from the discovery store and run Epic and GOG titles through Proton from there. Compatibility is generally good for singleplayer titles. Games with kernel anti-cheat will not work regardless of the launcher you use.

Is SteamOS faster than Windows 11 for gaming?

In many titles the two are within a few percent of each other, and SteamOS often wins on 1 percent lows because of the lighter background load. The bigger practical gain is boot time, memory footprint and how quickly the system returns from sleep. Frame rate parity varies by title and driver version.

Does SteamOS get security updates?

Yes. Valve pushes updates through the standard SteamOS channel, the same one that serves the Deck, and the underlying Arch base receives regular kernel and userland updates. The frequency is comparable to a mainstream Linux distribution.

About Birmingham AV

We have sold more than 87,000 items on eBay UK since 2017, with 24,756 buyer feedbacks at 98.9% positive. Every desktop, laptop and mini PC we ship comes with a twelve month warranty as standard. Birmingham AV Ltd is registered at Companies House under number 12383651, VAT number GB 348755066, and we operate out of Bromsgrove in Worcestershire. We are one of the highest volume refurbished PC operations on eBay UK.