LZDoom, RZDoom, ZZDoom, etc etc.
I wonder, do you people play all those forks and mods you develop alone?
Or there is some underground Doom multiplayer scene I am not aware of

Doom multiplayer is fun, Coop, DM.. some weird mods as well.
I was long Skulltag player and later Zandronum player, until it pretty much died.
I wonder if its really the end?