Kill 30 Enemies with the G-MAL

Successfully Counter all of a Brute's Damage-Giving Attacks

Defeat 20 Enemies with Hand-to-Hand Combat

Finish the Game on Easy Without Changing the Difficulty

Find 20 Treasures

Kill 50 Enemies with the M4

Kill 50 Enemies with the 92FS-9mm

Kill 50 Enemies by Melee-Attacking from Behind

Kill 30 Enemies with Mk-NDI Grenades

Kill 20 Enemies with Headshots

Defeat 20 Enemies with Hand-to-Hand Combat

Finish the Game on Normal Without Changing the Difficulty

Kill 50 Enemies with the M4