Kill 50 Enemies by Melee-Attacking from Behind

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

Kill 30 Enemies with the RPG-7

Defeat 250 Enemies with Headshots

Find 40 Treasures

Kill 20 Enemies with the Pistole

Kill 50 Enemies with the FAL

Kill 100 Enemies with Headshots

Kill 30 Enemies with Mk-NDI Grenades

Find the Strange Relic

Find 20 Treasures

Kill 5 Enemies in a Row with Headshots