Valve is continually play-testing games that are available on Steam and marking them to show their level of compatibility on the Deck. This is called the Deck Verified program, which is essentially a series of tests, run through a script, to see how the games perform. Valve also has people who download, install, and run through games to see whether the controls work, whether the keyboard pops up when you click on a text input field, and how the UI looks. If a game is marked as Playable instead of Verified, that doesn’t mean you should skip right past it. If it’s listed as Unsupported, it says that “some or all of this game currently doesn’t function on Steam Deck.” . . .