Kill 75 Enemies in a Row Without Dying

Play for 100 days.

Beat 'Chapter 20 - Caravan' in less than 15 minutes

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

Defeat 30 Enemies in a Row with Your Side Arm

Defeat 20 Enemies While Swimming

Defeat 5 Djinn With a Sniper Rifle

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

Finish the Game on Crushing Without Changing the Difficulty

Finish the Game on Normal Without Changing the Difficulty

Kill 30 Enemies with the T-Bolt Sniper

Kill 30 Enemies with the Tau Sniper

Kill 50 Enemies by Melee-Attacking from Behind