Valve takes another step toward making SteamOS a true Windows competitor
We've known for months now that Valve is expanding its Linux-based SteamOS operating system beyond the Steam Deck to other handheld PCs, starting with some versions of the Asus ROG Ally. This week, Valve began making some changes to its Steam storefront to prepare for a future when the Deck isn't the only hardware running SteamOS.
A new "SteamOS Compatible" label will begin rolling out "over the next few weeks" to denote "whether a game and all of its middleware is supported on SteamOS," including "game functionality, launcher functionality, and anti-cheat support." Games that don't meet this requirement will be marked as "SteamOS Unsupported." As with current games and the Steam Deck, this label doesn't mean these games won't run, but it does mean there may be some serious compatibility issues that keep the game from running as intended.
Valve says that "over 18,000 titles on Steam [will] be marked SteamOS compatible out of the gate," and that game developers won't need to do anything extra to earn the label if their titles already support the Steam Deck.