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

Kill 30 Enemies with the RPG-7

Kill 5 Riot Shield Enemies by Running Over Their Shield

Defeat 10 Enemies with Thrown-Back Grenades

Kill 75 Enemies in a Row Without Dying

Kill 30 Enemies with the Dragon Sniper

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

Kill 10 Enemies in a Row, Alternating Hand-to-Hand Combat and Gunfire

Kill 10 Enemies with Grenades While Hanging

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

Finish the Game on Hard Without Changing the Difficulty

Finish the Game on Crushing Without Changing the Difficulty

Kill 30 Enemies with the T-Bolt Sniper