Proton, Gamescope, Linux ESync/FSync Patches are all at least related to valves efforts from what I can gather and as an Arch User I feel it's the premier linux gaming distro due to valves efforts.
I think most of the work Valve does is upstream from Arch though but it's trickling down very fast (with arch, sometimes hours, if it's an AUR-Git package, seconds).
I think most of the work Valve does is upstream from Arch though but it's trickling down very fast (with arch, sometimes hours, if it's an AUR-Git package, seconds).