Let me tell you what is Mann Versus Zombies. (MvZ)
MvZ is Team Fortress 2's mod, with gameplay mechanics similar to CoD Zombies.

Steam Store Page
Gameplay Trailer
mannversuszombies.com

I knew CoD Zombies thru some community event of TF2. I ran into some CoDZ-like 'Mann vs Machine'(MvM) mission(map). After playing, I learned about CoD Zombies, and bought WaW from Steam.

Anyway, this MvZ game supports Steam Workshop like BO3.
Maybe all CoD Zombies maps, characters, weapons from past CoD games could be on MvZ, maybe w/ TF2 style.

What's your thought on this game? This game is like CoD Zombies, so I wanna know what's yours.

Is there a way to get the map files?

I deleted map files by mistake while cleaning some files.

I think there should be a mod that has MW3's Survival Mode-like mod for WaW, BO1 and BO2.

Not against zombie horde.
In multiplayer map, surviving as long as possible.

GhostRider01250
Yes.

Pack-a-Punch exists under the name of "Mannifester".

And for Perk-a-Colas:

Cobalt Cola - Stamin-Up

Relonade - Speed Cola

Brawler's Brew - Melee Macchiato/Ethereal Razor

Tuff Beer - Juggernog

More Gun Rum - Mule Kick

Accuraté - Deadshot Daiquiri

Trigger Tonic - Double Tap?

Quick Fix - Quick Revive