Kill 100 Enemies with Headshots

Kill 75 Enemies in a Row Without Dying

Kill 20 Enemies with Gunfire While Hanging

Find the Strange Relic

Find 20 Treasures

Defeat 20 Enemies with Hand-to-Hand Combat

Find 1 Treasure

Kill 20 Enemies with Gunfire While Hanging

Kill 30 Enemies with the M79

Kill 5 Enemies with Brutal Combo

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

Finish the Game on Normal Without Changing the Difficulty