Use the computer in the Captain's office.

Scan your first weapon!

Go 2 minutes without double jumping or wall running in a mission where these abilities are available.

Kill 5 enemies by using dynamite in the campaign

Complete 10 challenges in the campaign

Complete Nothing is Written

Perform a melee kill on 10 enemies anywhere in the campaign

Save 15 survivors from zombies

Open 5 GRE chests in Quarantine Zones

Catch 5 Bolters

Meet your old friend again

Kill 500 zombies with your vehicle