The Legion Go S SteamOS is set to release on May 25, 2025 and will be the very first non-Valve device to launch with SteamOS already installed on it.
Ahead of this gaming handheld’s launch, Valve has revealed a new SteamOS Compatibility system on the Steam Community page, that will be in place for devices that run SteamOS but aren’t a Steam Deck.
Valve announces SteamOS Compatibility rating system”The SteamOS Compatibility system covers any device running SteamOS that’s not a Steam Deck”https://t.co/U0E9gNfcPB pic.twitter.com/TsMnZwrC3EMay 12, 2025
The announcement reads:
Hello! Today we are announcing a new compatibility rating system for SteamOS devices. It’s an extension of the Steam Deck Verified process, which has been a useful tool for players to make decisions around what games to purchase and play on their Steam Decks. With the Legion Go S – Powered by SteamOS shipping soon, we are expanding Deck Verified and introducing SteamOS Compatibility ratings. These new ratings will roll out over the next few weeks.
The SteamOS Compatibility system covers any device running SteamOS that’s not a Steam Deck (currently only the Legion Go S falls under this category). SteamOS Compatibility ratings are based on a subset of the Steam Deck Compatibility testing results and are meant to show at a glance whether a game and all of its middleware is supported on SteamOS. This includes features like game functionality, launcher functionality, and anti-cheat support.
If a game and all of its middleware are supported on SteamOS, we will mark it as SteamOS Compatible. If not, it’s marked as SteamOS Unsupported. Please note that this rating does not include testing results for performance and input, since we will not know (and have not tested) how all titles will run on all potential hardware. We expect over 18,000 titles on Steam to be marked SteamOS compatible out of the gate.
Steam developers don’t need to take any additional action. If your title already has a Steam Deck Compatibility rating, an automated process will use that data to give it a SteamOS Compatibility rating. For titles that have not yet been tested for Steam Deck Compatibility, the same queue system applies, and we will continue testing new and old titles based on community interest. Once a new title has been tested, both Steam Deck and SteamOS ratings will be generated simultaneously. When this feature is rolled out, SteamOS Compatibility results will show up on your partner dashboard next to Steam Deck Compatibility results.
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