Kill 30 Enemies with the Arm Micro

Defeat 20 Enemies with Hand-to-Hand Combat

Kill 20 Enemies with Headshots

Finish the Game on Easy Without Changing the Difficulty

Kill 30 Enemies with Mk-NDI Grenades

Kill 50 Enemies with the Dragon Sniper

Kill 100 Enemies with Headshots

Kill 5 Enemies in a Row with Headshots

Defeat 20 Enemies with Hand-to-Hand Combat

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

Finish the Game on Easy Without Changing the Difficulty

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

Kill 30 Enemies with the MP40