Complete memory sequence 1.

Kill 100 Enemies with Headshots

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

Kill 20 Enemies with Gunfire While Hanging

Kill 20 Enemies with Headshots

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

Defeat 20 Enemies with Hand-to-Hand Combat

Finish the Game on Easy Without Changing the Difficulty

Kill 100 Enemies with Headshots

Defeat 50 Enemies with Hand-to-Hand Combat

Kill 50 Enemies with the 92FS-9mm

Kill 5 Enemies in a Row with Headshots