Finish the Game on Easy Without Changing the Difficulty

Kill 50 Enemies with the Micro-9mm

Kill 30 Enemies with the RPG-7

Kill 50 Enemies with the SAS-12

Activate a Tweak

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

Kill 30 Enemies with the Desert-5

Kill 100 Enemies with Headshots

Find 20 Treasures

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

Kill 50 Enemies with the 92FS-9mm

Kill 20 Enemies with the Pistole