Well....
Why not zs_the_grid?
Its where the Humans are on grid-like walkways that are suspended in the air, with broken rails at most parts.
The humans have to deactivate the nuclear bomb by finding the deactivation code, if they do not find the code in time, 3 seconds before the round ends, the bomb goes off, making sure the zombies always win.
But how they would get the code is custom decals with numbers hidden around the map and they have to find them and put them in the right order.
But the thing is, 3 tries for the code. BUTT ,(heh), there is a computer that on the screen keeps repeating the code for 40 seconds when the player presses e on it. After the 40 seconds, the order of the code is displayed, but the doors go into lockdown until a person finds the switch that is active. (randomly chosen). Then the humans are either slaughtered by that time, or they are in a big pack. Once the code is entered, Some of the walls flip open and it shows prop guns so the nooblets will think that there is breakable glass infront of them. (HUEHUEHUEHUHEU) ALSO, after all this shit is done, the game returns to normal gameplay.
You like?