DividedByMankind

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

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

Die, Devil Bird! Defeat Infected Bat.

On Leather Wings Get picked up by the Infected Bat.

Training Facility Complete Complete the training facility.

Custom to Bust 'Em Create a Custom Handgun.

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

Burned Alive Defeat an enemy by burning them.

This is How You Recycle Create a Molotov Cocktail.

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

Centurion Disciplinarian Defeat Centurion.

Misdirected Hostility Destroy a zombie's legs.

Train Complete Complete the train.

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

Fashion Plate Change into a costume.

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

Taking the Sting Out Defeat Stinger.