Kill a zombie with 10 different melee weapons.

Breach the seawall in under 2 minutes without taking MG fire.

Complete Ambush.

Reach the sniper perch without being detected in Ambush.

Protect the bombers by personally shooting down 12 enemy planes in Battle of the Bulge.

Complete Death Factory.

Complete Liberation.

Complete S.O.E.

Complete Operation Cobra.

Complete a Single Playthrough Without Dying Once

Use Dormin's Breath Attack

Defeat the 15th Colossus