Reach Commander (Level 55) in Multiplayer while playing online.

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

Complete the Campaign on any difficulty.

In Campaign, unlock all attachments for any weapon.

Use an enemy combat robot to kill 10 enemies.

Defeat Oz…again in Descent.

Use the cure station to kill 5 host zombies at once in Infection.

Kill 100 zombies with traps in Infection.

Rescue 4 survivors in a single game of Infection.

Reach round 30 in Carrier.

Survive until round 10 in Infection.

Kill 4 enemies with a single smart grenade.

Have 15000 credits in the bank in Outbreak.