CryoByte33 on YouTube[0] has videos explaining in details different configuration presets to run games like God of War, Witcher 3, or Breath of the Wild. He's also maintaining an impressive piece of software[1] that helps optimize your Steam Deck. Worst case scenario, if you don't find the game you're looking for in his videos, chances are you will find a decent configuration on SteamDeckHQ[2]

[0]: https://youtube.com/@cryobyte33 [1]: https://github.com/CryoByte33/steam-deck-utilities [2]: https://steamdeckhq.com/game-settings/