Complete Mission 6 (Any Difficulty Level)

Complete Mission 5 (Any Difficulty Level)

Fully Upgrade All Stats Of Any Weapon In Campaign Mode

Fully Upgrade A Single Stat Of Any Weapon In Campaign Mode

Complete Mission 2 (Any Difficulty Level)

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

Complete A Mission Without Dying

Collect An Armor Piece

Collect the key in the Female Ward

Drain the Sewers

Perform 45 kills with the M1911 Handgun in Multiplayer

Play a round of Air Superiority

Commandeer the enemy space station. (Complete "Loki" on any difficulty.)