I wanted to try playing this game on my Steamdeck, and through trial and error i found that Proton 4.11-13 is the latest version that runs it. I hope this helps someone. Also, I created this Steam Input Layout (steam://controllerconfig/3593839953/3818172523) with basic mappings. (Nvm, I didn't see it has gamepad support, though its finicky. You'll firstly need to use some layout to enter settings and then choose the gamepad, which for me was the 4th one, and only then you can switch to regular gamepad layout)