Kill 50 Enemies by Melee-Attacking from Behind

Kill 20 Enemies with the Pistole

Kill 50 Enemies with the M4

Kill 100 Enemies with Headshots

Kill 50 Enemies with the FAL

Kill 20 Enemies with Headshots

Explore Photo Mode

Finish the Game on Normal Without Changing the Difficulty

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

Defeat 250 Enemies with Headshots

Kill 30 Enemies with the MP40

Kill an Enemy While Playing as an Alternate Character Costume Other Than Drake

Kill 5 Enemies with Brutal Combo