Kill 10 000 Zombies

Complete Mission 6 (Any Difficulty Level)

Complete Mission 5 (Any Difficulty Level)

Perform 500 Headshots

Complete Mission 3 (Any Difficulty Level)

Completed All or Nothing.

Completed You'll Know It When It Happens.

Complete Mission 2 (Any Difficulty Level)

Complete A Mission In Co-Op Mode (Any Difficulty Level)

Fully Upgrade A Single Stat Of Any Weapon In Campaign Mode

Caused 10,000 damage with Unarmed weapons.

Reach wanted level (8) Offender as a Racer

Create a 'New Post' or 'Write a Reply' on the Wall