I made this because i saw something like this on a sever. It has an electric fence that is 100 % zombie proof, unless they disable it ,then they can jump over it. Also it has two buildings:
"Health and Protection", bottom middle and roof that you can go on.
"Zombie Control" where you kill, destroy, and help keep the zombie number under control . there are 8 cameras and a turret with a camera you can look though when you activate it in the control room. This is the most important building with out it the arena will be flooded with zombies and almost impossible to kill them all and activate the fence.
Also if a zombie gets over the fence the alarm will go off.
How To Play
1: First start the game buy running to the fence and turning it ON
2: Admin go into the Control room with the zombie xtermenators waiting for the attack.
3: Then the fence will go off (a zombie has deactivated the fence) then at least 10 to 20 zombie go over the fence. And when the zombies invade the alarm will go off so you will know if you are in a building. You need to turn the fence back on or you are doomed to die, get there before to many zombies get over.
4: Try to fight off the zombies but if you can't someone needs to go into the control room and click the button setting of the mines and killing up to 5 to 7 zombies (assuming that there are about 12) but before you must tell the units to go in a building or they will be blown up with the zombies.

This is the fence.

the ON OFF swich to the electric fence

Zombie Control Building

Control room in the building.

Inside the Health and Protection center

The turret
Tell me if i should add somthing or fix somthing, Thanks for looking.
COMMENT please.