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 five enemies in a row with a single punch, after softening them up with gunfire

Kill 20 enemies with a brutal combo

Kill 30 enemies with the M79

Kill 50 enemies in a row without dying

Kill 50 enemies with the PM - 9mm

Kill five enemies with a brutal combo

Kill 10 enemies with headshots

Find one treasure

Beat the Challenge of Olympus

Beat the game