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

Kill 30 Enemies with the Mk-NDI

Play in the Swimming Pool on the Cruise Ship

Kill 100 Enemies with Headshots

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

Kill 75 Enemies in a Row Without Dying

Kill 5 Enemies in a Row with Headshots

Defeat 20 Enemies with Hand-to-Hand Combat

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

Kill 30 Enemies with the RPG-7

Kill 50 Enemies with the SAS-12

Kill 30 Enemies with the Moss-12