The Zombie Shield is a weapon found in the Zombies map Green Run in the game mode TranZit, the map Mob of the Dead, Origins and Zetsubou No Shima. It is made of parts found around the Diner bus stop in Green Run (and built on the workbench in the garage), parts found around the Docks in Mob of the Dead, parts in the trenches in Origins and parts found in the labs in Zetsubou No Shima.
When using the shield, it does not generate any points for kills because it is a buildable. When it does not kill a zombie upon the first hit, it will give the player 10 points per zombie that was hit but not killed. It will kill a zombie with a single hit up until round 20, when it will take multiple bashes to send zombies flying. The shield will block zombies' attacks completely, even when on the player's back. However, the shield will only sustain 15 hits after which it will break. The shield can be planted to distract zombies.
The Zombie Shield will also deflect explosive damage dealt by the player without penalty. This is extremely effective on Mob of the Dead if using the Acid Gat or the Vitrolic Withering, as if a player gets trapped in a corner, they can simply fire the weapon, turn around, and have the shield block the explosive damage to the player while still killing the Zombies.
The shield is a useful asset in Mob of the Dead and Origins, as it occupies an empty inventory slot (unlike in TranZit where it can be replaced by any other, more conventional buildable such as a Turbine) and gives good defense on the player's back. It is advised to build the shield on a workbench near the player's main area of choice so it can be re-obtained easily if broken.
When the player builds the Zombie Shield in TranZit, they will push the pin down to lock the car door on the side of the shield. In Mob of the Dead, the character inserts a key into the cell door key slot.
The shield shows obvious damage overtime, starting with straight, intact parts, eventually bending at several places and then breaking.