Did you change the video settings to full screen? I don’t have experience with my steam deck and this game, but on my main arch setup I had to change to borderless full screen again. Game wouldn’t load otherwise. You either have to change or delete the config. Check ProtonDB for the correct config path.

Best I can do are the ones who are either playable or verified:

• Hogwarts Legacy
• F1 23
• Dead Space
• Mortal Kombat 1
• Battlefield V
• The Talos Principle 1+ 2
• Back 4 Blood
• Lego Star Wars: The Skywalker Saga
• Doom Eternal
• Battlefield 1
• Star Wars Jedi: Fallen Order
• Ori and the will of the Wisps
• Control Ultimate Edition
• Gotham Knights
• Nioh 2
• Battlefield 4
• Death Stranding
• injustice 2
• Wo Long: Fallen Dynasty
• Russian Village Simulator
• Prey

Is this an historical thing? I was really confused when I started using KDE.