How Linux Gaming Actually Works Now: Proton and the Steam Deck Explained

Linux gaming went from punchline to practical

For years, 'gaming on Linux' meant a short list of native titles and a lot of tinkering. That changed when Valve launched the Steam Deck, a handheld gaming PC running Linux, and leaned hard into a compatibility layer called Proton. Today a huge chunk of the Windows Steam catalog runs on Linux with little or no fuss, and the Deck has made Linux a mainstream place to play. Here is what is actually happening under the hood.

What Proton is and how it works

Proton is Valve's open-source compatibility layer, built on Wine (which translates Windows program calls into Linux equivalents) plus graphics translation tech like DXVK and VKD3D that convert Microsoft's DirectX into Vulkan, the graphics API Linux uses. When you launch a Windows game through Steam on Linux, Proton intercepts its Windows and DirectX calls and translates them on the fly. The result is that many games simply run, often at performance close to Windows, without the developer ever shipping a Linux version.

The Steam Deck Verified badges, decoded

To cut through the guesswork, Valve reviews games and assigns one of four compatibility categories, which you see right on the Steam store and in your library. Verified means the game works great out of the box (proper controller support, readable text, correct default settings, no compatibility warnings). Playable means it works but may need some manual tweaking, like selecting a community controller config or using the touchscreen for a launcher. Unsupported means it currently does not function on the Deck. Unknown means Valve has not tested it yet.

What 'Verified' actually checks

Per Valve, a Verified rating means a title passes four criteria: Input (full controller support with correct button icons and an automatic on-screen keyboard), Display (supports the Deck's default resolution with legible text and sensible defaults), Seamlessness (no compatibility warnings, controller-navigable launchers), and System Support (if running through Proton, the game and all its middleware, including anti-cheat, are supported). The review is ongoing across the entire catalog, and ratings can improve as Proton and the Deck get updates.

The big catch: anti-cheat

The single biggest reason a game shows up as Unsupported is anti-cheat. Some kernel-level anti-cheat systems either do not support Linux/Proton or require the developer to explicitly enable Proton support. Valve worked with the major anti-cheat vendors (like Easy Anti-Cheat and BattlEye) to make Linux support a simple toggle, but it is opt-in, so some competitive multiplayer titles still block Linux players even though the game itself would otherwise run fine. If you mainly play a specific online shooter, check its Deck status before assuming it works.

How to try it yourself

You do not need a Steam Deck. On any Linux PC, install Steam, then in Settings > Compatibility enable Steam Play (Proton) for all titles, and games will launch through Proton. Community resources like ProtonDB collect user reports on how specific games run and any tweaks needed. Between Proton maturing, the Deck's popularity pushing developers to care about Linux, and native Vulkan performance, Linux gaming in 2026 is no longer a compromise for most single-player libraries, it is genuinely good.

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See also: The Netherlands' NixOS government desktop, 7 vintage Linux desktop features worth bringing back.

Sources

• Steam Deck: Deck Verified compatibility program (Valve)

Published date reflects the original event date (2026-09-09). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.