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

Finish the Game on Normal Without Changing the Difficulty

Kill 30 Enemies with the T-Bolt Sniper

Kill 30 Enemies with the M9

Kill 100 Enemies with Headshots

Kill 30 Enemies with the Mk-NDI

Kill 20 Enemies with Gunfire While Hanging

Throw Back a Grenade and Defeat 2 Enemies at Once

Completed the "House of the Ned" mission

Defeat 50 Enemies with Hand-to-Hand Combat

Successfully Counter all of a Brute's Damage-Giving Attacks

Kill 20 Enemies with Headshots

Find 1 Treasure