itch.io

It shims on WINE/Proton perfectly well but they’re asking for an .x86_64 type or .appimge type compile of the game.

.x86_64 files are very lightweight and efficient but don’t include dependencies unless you tell Godot to package them with.

1. Readme on compiling for Steam Runtime
2. Steam Runtime 4 SDK

.appimage (and flatpak) files include the full final game directory and core dependencies in a file that self-extracts at run and then cleans up after itself. This way you can run the program on any Linux distribution without worrying about the different dependencies.

1. Godot “How do you create an AppImage?”

Yes… and No. It works, insofar that it runs through Wine if installed. That means a bit more performance requirements, and sometimes there's issues with fullscreen not being really on top of all windows (e.g. not the task bar if present), leaving some UI elements partially hidden.