Clear the game in single player on the “Supreme Master” difficulty setting.

Perform 500 Melee Kills

Complete Campaign Mode On 'Braindead'

Complete Mission 10 (Any Difficulty Level)

Complete Mission 9 (Any Difficulty Level)

Complete Mission 7 (Any Difficulty Level)

Perform 500 Headshots

Complete Mission 4 (Any Difficulty Level)

Complete Mission 3 (Any Difficulty Level)

Complete Mission 2 (Any Difficulty Level)

Fully Upgrade A Single Stat Of Any Weapon In Campaign Mode

Complete A Mission Without Dying