I've managed to install the game onto my Steam Deck and get it running through Proton.
My only issue is getting the game to recognize the built-in controls. If anyone can help me figure it out I'd really appreciate it.
Hello, that's amazing! How can we help you with that? The game normally only recognizes xBox gamepads.
Also someone did this and shared it on a Doom group on facebook, maybe he can also help you.
I'll post the link here, don't know where else to find him, hope the link works.
https://www.facebook.com/photo?fbid=10229859467540463&set=pcb.1142470203062398
Sorry here is the link to the post:
https://www.facebook.com/groups/180107965965298/permalink/1142470203062398/
And link to the group:
https://www.facebook.com/groups/180107965965298
None of us have much knowledge in Linux, but If you have an account I'm sure you can contact the person who posted this.