Kill 100 Enemies with Headshots

Defeat 20 Enemies by Blind-Firing While in Cover (without aiming)

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

Defeat 50 Enemies with Hand-to-Hand Combat

Kill 5 Enemies in a Row with Headshots

Defeat 20 Enemies with Hand-to-Hand Combat

Find 1 Treasure

Finish the Game on Normal Without Changing the Difficulty

Kill 50 Enemies by Melee-Attacking from Behind

Find 20 Treasures

Kill 100 Enemies with Headshots

Kill 50 Enemies with the FAL