Fuel Efficient

In TranZit, use an alternative mode of transportation.

I Don't Think They Exist

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

Vertigoner

In Die Rise, fling 10 zombies in one game.

I'm My Own Best Friend

In Die Rise, revive yourself.

Slippery When Undead

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

Pop Goes the Weasel

In Mob of the Dead, break the cycle.

Acid Drip

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

Making the Rounds

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

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.

When the Revolution Comes

In Buried, return to processing.

Revisionist Historian

In Buried, rewrite history.

Ectoplasmic Residue

In Buried, acquire a perk for free.

Candygram

In Buried, make a candy delivery.

Not a Gold Digger

In Origins, share a weapon you dug up.

Playing with Power

In Origins, build all elemental staffs in one game.

Overachiever

In Origins, complete all 4 Challenges in one game.

Kung Fu Grip

In Origins, free yourself and another from the Panzer Soldat’s claw in one game.

All Your Base

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