This is my second submission (that was based off a prototype of my first idea) in the "Zombie Manic" series, and it uses a more "Objective-based" system of play instead of the usual defense-based system.

The object is explained via command block and sign:

Get inside the armory and get ALL THE SUPPLIES.

To do this, you must first get inside the main base (by way of a disguised button near the front desk), get the key from the "Vent-Man", unlock the door to Steven's office, grab the armory key inside Steven's office, and gain access to the armory. Once inside, you can then loot the chests as much as you would like, taking refuge inside the Quartermaster's office.

Notes:
*The Tank was made by this guy:http://www.planetminecraft.com/member/airforcecraft/
*The lever and the button are two different things to be used at their own locations or it doesn't work right.