I have been running Guix System as my daily driver for 7 years now and I have not had any trouble using Steam as packaged by nonguix with my cursed nvidia GPU. My computer is from 2008 with a CPU/GPU upgrade in 2018.
There have only been a handful of games that I haven't been able to play, like Hitman Absolution. But other AAA games like RD2 and Witcher1-3 run without issue. Even Starcraft2, run through proton, works well.
There have only been a handful of games that I haven't been able to play, like Hitman Absolution. But other AAA games like RD2 and Witcher1-3 run without issue. Even Starcraft2, run through proton, works well.