Complete Demon Within on Hardened, Veteran, or Realistic.

Complete Rise and Fall on Hardened, Veteran, or Realistic.

Kill three enemies in a melee combo.

In Campaign, kill 10 enemies in under 3 seconds.

In Campaign, unlock all attachments for any weapon.

Complete New World on Hardened, Veteran, or Realistic.

Use an enemy combat robot to kill 10 enemies.

In Campaign, kill 5 stunned enemies in under 3 seconds.

In Campaign, kill an enemy through a wall or obstruction.

In Shadows of Evil, kill 5 Parasites while riding on the train.

In Shadows of Evil, use the rocket shield attack to kill at least 10 zombies in one burst.

Get a Specialist-based medal that requires 3 or more rapid kills while using any Specialist Weapon.

Deliver all the rocket parts to Orbot and Cubot.