Edit: While proton works amazing, the method below got fps drops from 30 to mid 25 sometimes. However there is a way better alternative which keeps the game at 60fps . This repo works wonders. Just follow the installation instructions and run the game with this command: /home/{your_user}/.local/bin/rpgmaker-linux --gamepath /path/to/game/folder
Just replace your_user with your username (on steamdeck it's usually deck)
I can confirm this works on desktop and on steamdeck as well!
Older instructions:
So far this is working perfectly on linux through steam!
Using proton-GE and launch options "--disable-gpu --disable-software-rasterizer" (don't use the quotation marks when pasting it on steam)