Kill 50 Enemies by Melee-Attacking from Behind

Kill 20 Enemies with Headshots

Kill 5 Enemies in a Row with Headshots

Find the Strange Relic

Finish the Game on Easy Without Changing the Difficulty

Find 100 Treasures

Kill 30 Enemies with the Desert-5

Kill 100 Enemies with Headshots

Kill 50 Enemies with the M4

Find 60 Treasures

Find 40 Treasures

Defeat 50 Enemies with Hand-to-Hand Combat