I know we had a server like this in the past.
I think this would also be fun to play now.
It should be possible on CS:GO as i have seen it work ->
https://www.youtube.com/watch?v=m6kNCqJmdNU
Don't know if there is a server available for this?
But i hope people would give it a shot.
Its lots of fun with a group of people just shooting and killing hordes of zombies.
Instead of escaping it just killing it.
What do you guys think?
(if my english is bad, i'm sorry )