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The Steam Deck’s game library runs into the tens of thousands, but not all of them behave the same way on the hardware. Valve introduced a four-tier “Deck Verified” rating system to help owners quickly gauge what to expect before launching a title — but the ratings have real limitations that aren’t obvious from the badge alone.

How SteamOS Runs Windows Games

The Steam Deck runs SteamOS, a Linux-based operating system. Most PC games are built for Windows, so SteamOS uses a compatibility layer called Proton to translate Windows instructions into something Linux can execute. Proton works well enough that the majority of the Steam library is playable, but the translation isn’t perfect — performance, stability, and feature support vary significantly from one title to the next. The Deck Verified program exists to communicate those differences without requiring users to dig through compatibility reports before every purchase.

The Four Ratings, Explained

Valve reviews games against a fixed set of criteria and assigns one of four ratings:

  • Verified — Works out of the box with the Steam Deck’s default 1280×800 resolution, full controller support, no manual configuration required, and text that’s readable at handheld viewing distance. This is the highest tier.
  • Playable — The game runs, but requires some user intervention: manually selecting a community controller layout, navigating touchscreen-only UI elements, or adjusting graphics settings before it feels right.
  • Unsupported — The game does not function on Steam Deck. Common reasons include anti-cheat software that blocks Linux, hard Windows dependencies, or fundamental runtime issues that Proton cannot bridge.
  • Unknown — Valve has not reviewed the game yet. A large portion of the Steam catalog sits in this category, including many older titles and smaller indie releases that haven’t been prioritized for review. Unknown doesn’t mean unplayable — many Unknown titles run without issues — but there’s no official guidance on what to expect.

When Valve launched the program, the company emphasized that the Steam Deck is an open platform: users can install anything they want, including software that bypasses the rating system entirely. The Verified badge is a convenience, not a gate.

Where the Official Ratings Fall Short

The community’s experience with Deck Verified has been more complicated than the four-tier system suggests. A recurring point of friction is that “Verified” sometimes means little more than “runs on Linux with a controller attached.” A game can hold Verified status while still delivering inconsistent frame rates, missing graphical features, or requiring Proton-specific workarounds that Valve’s review didn’t catch.

Ratings also don’t update automatically. As games receive patches and Proton matures, a title’s actual performance can drift significantly from its rating in either direction — a previously Unsupported game may become stable after a Proton update, while a Verified title can regress after a developer pushes a Windows-specific patch. Valve acknowledges that the Deck Verified program is an ongoing effort and that ratings change over time, but the pace of re-review doesn’t always keep up with how quickly the underlying software changes.

The community workaround is ProtonDB, an independently maintained database where Steam Deck and Linux users submit their own compatibility reports, performance notes, and specific fixes. ProtonDB reports tend to be more granular and more current than the official ratings, making it a more reliable first stop when a game’s Verified badge doesn’t tell the whole story.

OLED Hardware and Compatibility

The Steam Deck OLED, released November 16, 2023, introduced meaningful hardware changes: a larger OLED panel, a more efficient 6nm APU, a larger battery, and faster RAM. These changes affect how games perform at the component level, and not all of it is reflected in existing Deck Verified ratings, which were assigned against the original LCD hardware in many cases. Games that ran at the edge of acceptable performance on the LCD model may run noticeably better or worse on OLED depending on how they interact with the updated APU and memory configuration.

How to Use the Ratings in Practice

The Deck Verified badge is a useful starting point, but treating it as a final answer leads to surprises. A practical approach:

  1. Check the official rating for a quick pass/fail signal.
  2. Cross-reference with ProtonDB for recent user reports, especially for Playable-rated titles or anything with a Verified rating older than six months.
  3. For Unknown-rated games, ProtonDB is often the only reliable source of information.

Valve’s rating system and the community database complement each other. Neither is complete on its own.

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