Finish the Game on Easy Without Changing the Difficulty

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

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

Kill 50 Enemies by Melee-Attacking from Behind

Find 20 Treasures

Kill 30 Enemies with the KAL-7

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

Kill 5 Enemies in a Row with Headshots

Kill 20 Enemies with Headshots

Find 1 Treasure

Finish the Game on Normal Without Changing the Difficulty

Defeat 250 Enemies with Headshots