Complete a level with more than one player

Get a 2X Multiplier

Kill 20 enemies with the Desert - 5

Find 30 treasures

Kill 20 enemies with the Wes - 44

Kill five enemies in a row with a brutal combo

Find 20 treasures

Kill five enemies with a brutal combo

Kill 50 enemies with the AK-47

Kill 10 enemies with grenades by aiming while hanging from a ledge

Kill 20 enemies by shooting from the hip (without aiming with the L1 button)

Kill 50 enemies with the PM - 9mm

Find five treasures