Uncharted 3: Drake's Deception achievements

Defeat 20 Enemies While Swimming

Find all 100 treasures

Defeat 50 Enemies in a Row Without Auto-Reloading

Defeat 30 enemies in a row with your side arm

Defeat 30 enemies with the Dragon Sniper

Find 80 Treasures

Finish the Game on Crushing Without Changing the Difficulty

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

Defeat 30 enemies with the PAK-80

Complete one Cooperative Multiplayer game

Kill 30 Enemies with the Mag 5

Defeat 30 enemies with the SAS - 12