Kill 30 Enemies with the SAS-12

Kill 75 Enemies in a Row Without Dying

Kill 10 Enemies in a Row, Alternating Hand-to-Hand Combat and Gunfire

Kill 10 Enemies with Grenades While Hanging

Kill 20 Enemies by Shooting from the Hip (without aiming)

Finish the Game on Hard Without Changing the Difficulty

Finish the Game on Easy Without Changing the Difficulty

Kill 30 Enemies with the T-Bolt Sniper

Kill 30 Enemies with the Tau Sniper

Kill 30 Enemies with the G-MAL

Defeat 10 Enemies with Thrown-Back Grenades

Find 80 Treasures

Kill 50 Enemies by Melee-Attacking from Behind