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

Kill 4 Enemies with 1 Explosion

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

Finish the Game on Hard Without Changing the Difficulty

Finish the Game on Easy Without Changing the Difficulty

Kill 30 Enemies with the T-Bolt Sniper

Find 100 Treasures

Kill 30 Enemies with the Mag 5

Kill 30 Enemies with the Mk-NDI

Play in the Swimming Pool on the Cruise Ship

Kill 100 Enemies with Headshots

Hit 3 Enemies with Fish in the Market

Kill 30 Enemies with the G-MAL