Valve have released another great update for Proton Experimental to play more Windows games on Linux / SteamOS + Steam Deck for October 24th.

How to get it: this will show up as an update in your Steam Downloads if you already have it installed. You can also select to install it from your Steam Library to set on games individually, or it will install automatically if Valve have it set on a game by default. See more about all the different Proton versions in the GamingOnLinux Guide.