How Linux Became a Real Gaming Platform: Proton and SteamOS Explained

For most of PC gaming history, the advice to anyone who wanted to play games on Linux was short and slightly smug: don't. Linux was for servers, programmers and people who enjoyed fixing things. Games were made for Windows, and that was that.

In 2026 that advice is out of date. In the March 2026 Steam Hardware Survey, Linux passed 5% of Steam users for the first time, reaching 5.33%, more than double the 2.3% of a year earlier. Valve now sells two Linux-based gaming machines, the Steam Deck and the Steam Machine. Lenovo has a SteamOS edition of its flagship handheld. And in October, even Epic Games released its first Linux launcher. Something fundamental has changed.

What Linux and SteamOS are

Linux is a free, open-source operating system: an alternative to Windows or macOS that anyone can use, modify and share. It comes in many versions, called distributions, from beginner-friendly ones to highly technical ones.

SteamOS is Valve's own Linux distribution, designed to boot straight into Steam and feel like a console. It's what runs on the Steam Deck and the new Steam Machine, and since 2025 it has also come to some third-party handhelds, such as the Lenovo Legion Go S. In early 2026 Lenovo announced a SteamOS edition of the Legion Go 2, starting at $1,199.

That Legion Go 2 is a useful sign of how far things have moved. It uses the same hardware as the Windows model, including an AMD Ryzen Z2 Extreme chip, up to 32GB of memory, an 8.8-inch 144Hz OLED screen and a 74Wh battery, yet the SteamOS version is priced above the $1,049 Windows launch price. A few years ago, a Linux version of a gaming device would have been the budget option. Now it's sold as the premium one, because buyers have learned that SteamOS on a handheld usually means better battery life, faster sleep and resume, and a smoother, console-like experience.

The same logic drives the Steam Machine. Valve didn't put Linux in it to save money on a Windows licence. It did it because SteamOS lets Valve control the whole experience, from the boot screen to the controller settings, in a way that would be impossible on Windows.

The magic trick: Proton

The breakthrough was Proton, a compatibility layer Valve released in 2018. Proton is built on Wine, a long-running open-source project that translates the instructions a Windows program expects into ones Linux understands. Valve added its own work on top, especially for graphics, translating Windows' DirectX graphics calls into Vulkan, an open graphics standard that runs well on Linux.

The result is that most Windows games run on Linux without the developer changing anything. You click Play in Steam, Proton quietly does the translation, and the game starts. In some cases, games even run faster than on Windows. Windows Central cited testing by Tom's Hardware that found switching an Xbox Ally X handheld from Windows to SteamOS raised frame rates by up to 32%.

How big Linux gaming really is

The numbers are now large enough to matter:

• 5.33%: Linux share of Steam users in March 2026, a record.
• 2.3%: the share a year earlier.
• About 25%: the share of Linux users on Steam running SteamOS specifically, according to the March data. The rest use other distributions such as Arch Linux.
• About 20 million: PCWorld's rough estimate of Linux users on Steam, which the author called a likely undercount.
• 3.95%: Linux share in the October 2026 survey, after a dip over the summer.

The survey bounces around from month to month, partly because of how Valve samples users, but the long-term trend is steeply upward.

What works, and what doesn't

Most single-player games and many multiplayer games work well. Valve's Steam Deck Verified ratings, which also apply to the Steam Machine, tell you at a glance whether a game is fully supported, playable with minor issues or unsupported. Community sites track thousands more.

The big exception is anti-cheat. Some competitive online games use kernel-level anti-cheat systems that refuse to run on Linux, or their publishers have chosen not to enable Linux support. If your main game is one of those, Linux isn't for you yet. Games bought through other stores also need extra steps, although that's improving: GOG has supported Linux since 2014, and Epic's rebuilt launcher, announced on October 15, 2026, runs on Linux for the first time.

Some developers now ship native Linux versions too. Mega Crit's Slay the Spire 2, built in the open-source Godot engine, runs natively on Linux and is Steam Deck Verified.

If a game does misbehave, there's usually a fix that doesn't involve a terminal. In Steam, open the game's Properties, go to Compatibility and choose a different Proton version; newer or older versions sometimes handle a particular game better. Valve ships regular Proton updates, and each one tends to move a few more games from "unsupported" to "playable." It's not quite the plug-and-play promise of a console, but for a Steam library it's remarkably close.

Why it's happening now

Three things came together:

• The Steam Deck put Linux in millions of hands without most owners even noticing, and gave developers a reason to test their games on it.
• Windows changes. Microsoft ended mainstream support for Windows 10 in October 2025, and Windows 11's hardware requirements left some older PCs behind. Linux breathes new life into those machines.
• Valve's long game. Valve has spent years building an alternative to Windows so that Steam isn't dependent on one company's operating system. The Steam Machine, Steam Controller and Steam Frame headset all run SteamOS.

By the numbers

• 2018: Proton released.
• 5.33%: Linux's record Steam share, March 2026.
• Up to 32%: the frame-rate gain Tom's Hardware measured switching one handheld from Windows to SteamOS.
• $1,199: starting price of the SteamOS Legion Go 2.
• 2: Linux-based gaming machines Valve now sells.

Should you switch?

• Switch, or try it, if: you play mostly single-player and Steam games, your PC is too old for Windows 11, or you like the console-like feel of the Steam Deck.
• Wait if: your main games use anti-cheat that blocks Linux, you rely on Game Pass through the Xbox app, or you need specific Windows software.
• Easiest test: many Linux distributions can run from a USB stick without installing anything. Try your favourite games before you commit.

What to watch

The biggest signal will be anti-cheat: if major competitive games start supporting Linux, the last big barrier falls. Also watch the Steam Machine's sales in its first full year, and whether more PC makers follow Lenovo with SteamOS editions of their hardware.

For more, read our Steam Machine explainer, why Steam dropped 32-bit Windows, and how Epic's new launcher embraced Linux.