Valve is adding a new compatibility rating for games that will run on devices other than the Steam Deck, such as the upcoming Lenovo Legion Go S with SteamOS.
Valve plans to rate over 18,000 Steam games for compatibility with third-party devices, based on a subset of Steam Deck compatibility testing results.
The compatibility ratings will showcase whether a game and its middleware are supported on SteamOS, including game and launcher functionality and anti-cheat support.
Valve ensures that a game verified for the Steam Deck will have a SteamOS compatibility rating that is the same or better, making it easier for users to know if they can run the game on SteamOS and other devices.