the only way to try and play Baldur's Gate III on GNU is [...]
argh, calling Linux "GNU" is just wrong. D: Stallman's done a lot of great stuff, but The Linux Naming Controversy is right down there with emacs.
I hear you, vometia! Many diehard GNUs, after years of saying, "GNU+Linux", love to say just, "GNU" as there is now a fork of Linux, GNU Linux-libre, which is not under the Linux foundation, but instead GNU. (In the same way that GNU HURD is part of the GNU project.) The GNU Linux-libre kernel has an automated system to remove all the binary-blob stuff from the Linux kernel. I still also like to say GNU+Linux, for good old times' sake, and for the fine ring it has, but sometimes I like to throw off all inhibition and go outright GNU!
Here is a link to the GNU Linux-libre page. If your hardware needs proprietary drivers for wifi/ethernet etc, you might have some connectivity difficulties with it, so be aware of your hardware:
https://www.fsfla.org/ikiwiki/selibre/linux-libre/Here is an image of the Linux-Libre mascot, Freedo. (Tux is the Linux mascot.)
https://www.fsfla.org/ikiwiki/selibre/linux-libre/100gnu+freedo.png
