From my understanding Steam Decks come with SteamOS preinstalled on them. Yet when you look at the list of games on steam that are compatible with Linux + SteamOS, its a small fraction.
But what confuses me is this page
https://store.steampowered.com/steamdeck/mygames
It shows your games that are compatible with the Steam Deck which has a Linux based OS. And almost my entire library is compatible with the Deck. Can someone help me understand how this is possible? If games are compatible with the Steam Deck, why wouldn’t they also work on Ubuntu for example?
Games that work are generally exactly the same. If you sit down in front of a Pc already running the game you cant tell the difference.
Sometimes you need to fiddle a bit to get a game working. Sometimes you click play and you play. Some developers dont want you to play their games so they dont work (anti cheat).
Most things work very well. Some games are more fun to get working than playing the game in my experience.