I can't host this (Sadly :C)
I remember a while back someone made a No Mercy Rooftop, it was downloadable and I used it, kinda edited it, and it got a lot of people. Well, I kinda lost it on a total different computer, so I just decided to re-create the whole thing (With some nice interiors.)
Everything is red because the whole theme is sort of Apocalyptic red sky sort of.
This is the spawn, you can choose from Shotguns, Assault Rifles, or SMGs
Thanks to Bushido, for is awesome weapon packs. Which is what the weapons consist of.

Inside the shotgun room

Inside the Assault Rifle Room

Inside the SMG room

Everything is open-spaced. It makes it a little harder because zombies can come from any corner.

This is the teleporter, like in national socialist Zombies. Still working in progress. (I kinda wanted to add some of that too)

This is where you teleport, nothing much, I'm still kinda working on it.

This is the supply room, it cost 15 points to unlock (1 point for every kill) It also has a witch somewhere, so watch out!

This is one of the spawn rooms, after you choose your weapons.

This is sort of a "Shop" where you can spend points. There is going to be plenty more than this in the future.

Feel free to rate. I would like the support. Or the suggestions.
Oh yeah, if anyone is willing to host this (maybe), it will be a real pleasure.
Thankyou!