There's currently somewhere around 68,000 games on Steam and so it's going to take a long time for Valve to check them all on Steam Deck but here's some recent picks.
11000 games aren't nearly close to the total games on steam. I have a large library of 1,000 games and some aren't playable. The original Max Payne is listed as unsupported.
I am not knocking valve's progress here but I am saying that they aren't nearly done yet.
It's explicitly marked as unsupported. I wonder why though. Maybe I'll check it out but I'd rather not gamble on each purchase. Something like oneshot doesn't work on Linux. Their native build is broken and the proton version has some sort of mouse mapping bug last I checked. https://www.protondb.com/app/420530
So if it's not at least playable according to steam deck rating, I won't gamble.
There's a bunch that doesn't work for my Steam Deck.
It does open. It does play. But controllers dont map correctly or there's weird layering UI issues, where the game is unresponsive because its waiting for a keyboard event somewhere else, and the player can't actually get there using a controller because the devs assumed people would only use mouse+keyboard. Not even switching controller setups make it work.
That's my bad; I automatically read "Steam Deck" in the parent comment as "Linux" which is obviously a much different story. I've definitely had my share of issues getting certain games to work properly on my Steam Deck that otherwise run flawlessly on my desktop.