It works, I played the entire back half of the game on Linux. A lot of games fall into this bracket with proton of "devs not willing to commit to Linux support, but does actually work".

> It works, I played the entire back half of the game on Linux.

How could you already have done this with the native linux build, which was just released today? I would think BG3 too long a game for that.

Or are you talking about playing the Windows build in Proton?

SteamOS isn’t just Arch, it’s significantly custom and doesn’t have access to the arch repos.

The window manager, package manager, etc are completely custom. The OS is a read only image based system.

And honestly I'm fine with that. Given the permutations involved I think it's reasonable for Larian to not commit to supporting them all. And as you said, it will probably work fine.