When Star Wars Jedi: Fallen Order first went on sale, it was one of the highlights of the steam deck. Every modern Battlefield, Need for Speed, Mass Effect, FIFA, and Madden title was retroactively revoked by Valve.
There are fixes on the way, according to both Valve andEA. If you are comfortable navigating the desktop Linux interface and willing to risk your save games, there is an easy way to circumvent it.
There is a partial list of titles that are no longer steam deck verified.
A Way Out Battlefield V, Dead Space, and Mass Effect.
Most games that use the Electronic Arts App will likely be affected by this. It can interfere with the way Windows games launch on the Linux-based Steam Deck if the issues stem from theEA App. You will probably see a logo on the drain instead of a game.
Windows games run on the Deck because of Valve's Proton compatibility layer, which fakes a portion of the Windows filesystem so that games know how to load all their prerequisite parts If you want to get it to work temporarily, you can turn on Proton Experimental in your game's compatibility tab.
It isn't a permanent fix because new updates to the game can break the Proton files and cause your game launch to spin down the drain again.
It sounds like they may have to tackle some issues on a game-by-game basis, but Valve says that they are fixing that as well.
While we don't officially support the steam deck, we understand the player frustration and we're always looking for ways to improve their experience everywhere our games appear."
You can still get these games to load with one simple trick if you want to. If you want to protect your save games, you need to hold the steam deck power button and switch to desktop mode.
You can choose a game and hit the gear icon. The game should launch after that and recreate everything the game needs.
Jedi: Fallen Order was able to redownload its save games from the cloud after it was deleted, but I lost hours of progress with the Catalyst.