I’m sure there are but honestly in my library of ~1,200 going through the unsupported games that I thought looked interesting, they’ve all just worked. In just my OLED the last month 28l of 113 installed games are unsupported.

Revita, Dark Future, Barrier X, Slapshot, Ace of Seafood, Aegis Defenders, Bleed, Gravilon, GundeadlGne, Hell Yeah!, even GTA Vice City just boots right up. Othercide, Kinetic Void, Litil Divil an old DOS game, Moose Life, Outland, Platforminers, Power Up, Raiden V, Screen Cheat, Sky Rogue, the Shadowgrounds games, Stardust Vanguard, Totally Reliable Delivery Service, Turbo Pug DX and Worms Blast, Ultimate Mayhem, and World party all work perfectly out of the install with no tweaking (other than getting the controller template of course).

Of all of these Sleeping Dogs gave me the most trouble by just having a menu that didn’t want to use the Steam button to activate mouse mode. The game itself works fine.

All 28 unsupported games just work.

Don’t get me wrong, I’m sure there will be a need for these tools for me at some point, I had them after a while for the OG Deck just in case, though I never needed them there. Only the exceed games needed to be swapped to 5.13.6. But both there and for the OLED I’ve been going through my library of games I’d never really play on PC but which fit the format of the Steam Deck I’ve been fully expecting to install and tweak these games with no need whatsoever to tweak them. It’s good to be prepared, but I’ve been more than pleasantly surprised.

In my experience, I’ve been finding that unsupported games are that way due to various qualifications not surrounding gameplay. Revita for example is unsupported on Steam Deck because there are links in the main menu (to Discord/plush purchase). A couple of the games may not support 1280x800 either but that’s negligible. Obviously, the outliers for unsupported games will be VR and Multiplayer games.

Anyway, all this to say - it’s good to be prepared but don’t let the idea of something being unsupported stop you from trying it. More often than not I’ve experienced the games work just fine and the amount of tweaking needed to get it working is generally minimal (tbh, despite having the proton plugin for the OG Deck I never once used it).