Find 20 treasures

Keep yourself or your teammate on fire until it exhausts by making 5 or more unanswered baskets

Defeat 30 enemies with the SAS - 12

Defeat 30 enemies with the Mk-NDI

Make five enemies drop their grenade by shooting them

Defeat five enemies in a row using stealth attacks

Defeat 50 enemies with hand-to-hand combat

Defeat 20 enemies with hand-to-hand combat

Kill 1 000 Zombies

Fully Upgrade A Single Stat Of Any Weapon In Campaign Mode

Complete Mission 2 (Any Difficulty Level)

Collect An Armor Piece