I got it to run on my Steam Deck using GE-Proton9-2. Use the first part of this guide to install it from Desktop mode:
https://steamcommunity.com/sharedfil...?id=3177959238
Then make sure you go back into Gaming mode, go to the properties of the game, go to compatibility, check the box, and then select "GE-Proton9-2".
Have fun!