I remember when CS Pro Mod was being made between the transition of CS 1.6, Source, the 1.6 community didn't want to move over to Source, before GO/CS2 came around.
Cool to see what's basically Quake1/doom style but this is a far fetch away from counter-strike. Although if netcode could be imagined and implemented I don't see why making a lower tier Counter-Strike wouldn't be doable. I'd play it if it were the quake style old-graphics version of CS that allowed for skill gaps.
Great article, love the nostalgic feeling.