Kill 50 Enemies by Melee-Attacking from Behind

Find 20 Treasures

Kill 20 Enemies with Gunfire While Hanging

Kill 30 Enemies with Mk-NDI Grenades

Defeat 50 Enemies with Hand-to-Hand Combat

Defeat 20 Enemies with Hand-to-Hand Combat

Finish the Game on Normal Without Changing the Difficulty

Kill 100 Enemies with Headshots

Kill 75 Enemies in a Row Without Dying

Kill 5 Enemies in a Row with Headshots

Find 20 Treasures

Find the Strange Relic