The Lights Of Their Eyes

In Green Run, pacify at least 10 zombies with 1 EMP.

I Don't Think They Exist

In TranZit, kill one of the denizens of the forest while it is latched onto you.

Welcome to the Penthouse

Prestige once in multiplayer Public Match.

Welcome to the Club

Reach Sergeant (Level 10) in multiplayer Public Match.

Slippery When Undead

In Die Rise, kill 5 zombies with a single shot from the Sliquifier.

I'm My Own Best Friend

In Die Rise, revive yourself.

Vertigoner

In Die Rise, fling 10 zombies in one game.

Pop Goes the Weasel

In Mob of the Dead, break the cycle.

Making the Rounds

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

GG Bridge

In Mob of the Dead, survive an entire round on the bridge on round 15 or higher.

Acid Drip

In Mob of the Dead, convert a weapon using a kit.

No One Escapes Alive

In Mob of the Dead, execute the escape plan.

Feed the Beast

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

Paranormal Progress

In Mob of the Dead, open a door without spending points.

Revisionist Historian

In Buried, rewrite history.

Candygram

In Buried, make a candy delivery.

I’m on a Tank!

In Origins, ride the tank around the map without getting off.

Overachiever

In Origins, complete all 4 Challenges in one game.

Master Wizard

In Origins, wield all of the ultimate staffs in one game.

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.

Not a Gold Digger

In Origins, share a weapon you dug up.