Survive your first night.

Modify your weapon for the first time.

Use an Inhibitor for the first time.

Perform a Perfect Block 10 times in a row without taking damage.

Complete all 4 bowling lanes

Gather 200 resources during single match in scavenge raid mode

Dispense 10 explosive ammo packs to teammates

Finish any level without using health packs

Mark special zombies 50 times

Open 15 rooms or containers with breaching charge

Suit up. Head to toe.

Someone should do something about this

Warn them of the coming end 8 times