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Pop Goes the Weasel In Mob of the Dead, break the cycle.

Undead Man's Party Bus In TranZit, complete all additions to the bus in 1 game.

Double tap Finish a level with 5 or less zombies resurrecting.

The boat can leave now... Tell the crew Complete Death Canal on any difficulty.

Every bullet counts Get 3 headshots with one bullet.

Give me something to shoot! Kill a Sniper whilst they are jumping between vantage points.

I never liked them anyway Kill a friend who has resurrected as a zombie.

Citizen of the Galaxy Attain ‘Babelfish’ status in Words Collected

Choo choo! Complete Dead Ahead on any difficulty.

Gold Earn a Gold Medal on any chapter.

Blood splattered Reach Rank 5.

Cleanup on aisle 4! Kill a Suicider with his own explosives.

Say goodbye, creep! Kill a Zombie using the Blade Melee Special Attack.

Shoot it, man! Shoot it in the head! Headshot a Zombie post resurrection.

Groovy Change your characters appearance, such as with a hat or costume.

A Wobbly Start Complete Jelly Job

Second Axon Defeat the second Axon.

First Axon Defeat the first Axon.

Expeditioner Reach level 33.

Old Lumière Find your way through Old Lumière.

Monoco's Station Find your way through Monoco's Station.

Expedition 33 Unlock all playable characters.

Perfection With Verso, reach Rank S.

Forgotten Battlefield Find your way through Forgotten Battlefield.

Installation 04 Complete Halo.

The Autumn Leaves Complete Pillar of Autumn.

Stone Wave Cliffs Find your way through Stone Wave Cliffs.

Big Ride Ride the train

Big Tunnel Enter a big tunnel

Big Help Wear something on your hip

Big Sit Ride the chairlift

Overachiever In Origins, complete all 4 Challenges in one game.

Big View Visit the map

Big Pack Wear a backpack

Big Walk Cross the drawbridge

They are going THROUGH! In Ascension, kill at least 5 zombies with 1 Gersh Device.

Sally Likes Blood Demonstrate killer economic sensibilities by taking down 3 enemies with a single bullet.

The eagle has landers In Ascension, escape on all 3 lunar landers.

Blinded By the Fright In Shangri-La, kill a Shrieker zombie while blinded by it.

I’m on a Tank! In Origins, ride the tank around the map without getting off.

Playing with Power In Origins, build all elemental staffs in one game.

All Your Base In Origins, activate all generators without allowing one to stop.

You Have No Power Over Me In TranZit, defeat "him" without being attacked by "him".

Fuel Efficient In TranZit, use an alternative mode of transportation.

Just ask me nicely Break free from the torture chair.

Making the Rounds In Mob of the Dead, complete the cycle 3 times.

Feed the Beast In Mob of the Dead, obtain Hell's Retriever.

No One Escapes Alive In Mob of the Dead, execute the escape plan.

Death From Below In Buried, drop the beat on 10 zombies in one game.

When the Revolution Comes In Buried, return to processing.