Kill three enemies with one explosion

Kill five enemies with a brutal combo

Kill 10 enemies by aiming while hanging from a ledge

Finish the game in Easy Mode

Find 25 treasures

Kill 50 enemies in a row without dying

Kill 20 enemies with the Wes - 44

Kill 20 enemies with the Desert - 5

Kill 100 enemies with headshots

Kill 50 enemies with the AK-47

Find five treasures

Kill five enemies in a row with headshots

Find one treasure