Not today you won't

Complete 12 consecutive Waves and escape from the Horde Map "The Bitter End".

Got your back

Kill 50 enemies that are actively attacking other players.

He did Nazi that coming

Complete Hell Machine! on any difficulty.

Is it over?

Complete the Campaign on any difficulty.

This is no Sunday School picnic!

Complete the Campaign on Hard difficulty.

You're all going to die down here

Complete Hell Base! on any difficulty.

Gore soaked

Reach Rank 50.

All roads lead to Rome

Complete All Roads Lead To Hell! on any difficulty.

All of this has happened before…

Complete Molten Nightmare on any difficulty.

What did you say, Blain?

Complete 4 level sections without using a medkit.

In the dark dark woods...

Complete Rotten Coast on any difficulty.

Double tap

Finish a level with 5 or less zombies resurrecting.

Look mummy! A shark!

Complete Zombie Zoo on any difficulty.

Chain reaction

Kill 50 Zombies in a row without missing a shot.

Leave the limbs you've lost

Sever 10,000 limbs.

Weird science

Complete Meat Locker on any difficulty.

Kill of the week

Drop a pallet of Artillery Shells on a Zombie

I never liked them anyway

Kill a friend who has resurrected as a zombie.

A gross gross

Survive 144 Waves in total.

The bigger they are...

Kill 5 Heavies with takedowns.

Take a little bit of Italy with you

Complete 12 consecutive Waves and escape from the Horde Map "Villa Della Morte".

Stand back boy!

Kill 3 enemies with one blast from a Preacher.

Give me something to shoot!

Kill a Sniper whilst they are jumping between vantage points.

Zombie killin' machine

Kill 5000 enemies of any kind.

Into the deep

Complete 12 consecutive Waves and escape from the Horde Map "Into the Darkness".

Cranial blowout!

Get an unbroken 10-headshot streak.

Groovy

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

Gold

Earn a Gold Medal on any chapter.

The boat can leave now... Tell the crew

Complete Death Canal on any difficulty.

Shock therapy

Kill 20 zombies with Electric Punch Special Attack.

You've got red on you

Perform 50 Takedowns in total.

Every bullet counts

Get 3 headshots with one bullet.

Blood splattered

Reach Rank 5.

Choo choo!

Complete Dead Ahead on any difficulty.

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.

Staring at Shadows

Complete 12 Waves and escape from Horde Map 'Undead Wood'