kenseizenkai

Taking the Sting Out Defeat Stinger.

Sit, Boy, Sit! Good Dog Break free of a Cerberus while they are biting you or trying to push you down.

Train Complete Complete the train.

This is How You Recycle Create a Molotov Cocktail.

Zero In Defeat an enemy with a critical-hit headshot.

Here I Come to Save the Day Attack an enemy to save your partner who is grappling with that enemy.

Fashion Plate Change into a costume.

Centurion Disciplinarian Defeat Centurion.

Burned Alive Defeat an enemy by burning them.

Guns are Too Quick Defeat an enemy with a knife.

Dead, Dead, Deadski Defeat a zombie by stomping on them.

I'm a Medic, Not a Bodybuilder Try to push something heavy with Rebecca.

Training Facility Complete Complete the training facility.

Die, Devil Bird! Defeat Infected Bat.

Custom to Bust 'Em Create a Custom Handgun.

Laboratory Complete Complete the laboratory.

Factory Complete Complete the factory.

Proto Tyrant Down Fight off the Proto Tyrant.

Proto Tyrant Down Again Defeat the Proto Tyrant.

Alley-oop! Shoot down a Hunter or an Eliminator while they are jump attacking in the air.

On Leather Wings Get picked up by the Infected Bat.

How 'Bout a Light, Bud? Defeat Mimicry Marcus with a Molotov Cocktail or a Napalm Grenade.

Treatment Plant Complete Complete the treatment plant.

Hey, Queenie! Feast on this! Defeat Queen Leech.

Apprentice of Unlocking Obtain all keys and use them all.

Calm the Zombie Nerves Play the piano using Rebecca.

High Five Celebrate your cooperative calibration success

Misdirected Hostility Destroy a zombie's legs.

Green is the Color Use a Green Chemical.

Distraction Tactician Call an enemy over, then take them down undetected when they investigate

Team Building Complete all test chambers in the Team Building co-op course

Asset Retrieval Complete Safehouse on any difficulty

Trying Out New Things Play Leech Hunter.

Leech-Shaped Hole in my Heart Finish Leech Hunter with rank E or above.

Find Time to Combine Combine every type of herb with each other.

Fileophile Read all files.

Confidence Building Complete all test chambers in the Mass and Velocity co-op course

Ambush Escaped Complete Insurgent Stronghold on any difficulty

I Have the Touch Defeat Mimicry Marcus for the first time only using a knife.

Rock Portal Scissors Win 3 co-op games of rock-paper-scissors in a row

Allergic to First Aid Spray Finish the game without using a First-Aid Spray.

American Consumption Prevented Complete American Consumption on any difficulty

Winged Spawn of Satan Defeat 16 bats in the church.

That's Officer Chambers to You Defeat all bosses except Centurion using Rebecca.

A Weird Interest in Leeches Finish Leech Hunter with rank A.

Terrorist Factor Turned Complete Private Estate on any difficulty

Bridge Building Complete all test chambers in the Hard-Light Surfaces co-op course

Narbacular Drop Place a portal under your co-op partner while they are gesturing

Who's Got the Herb? Finish the game without combining herbs.

Tracker Placed Complete Abandoned Mill on any difficulty