Defeat 50 enemies with hand-to-hand combat

Defeat 75 enemies in a row without dying

Defeat five enemies in a row with headshots

Find one treasure

Kill 50 enemies with the M4

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

Kill 100 enemies with headshots

Find 20 treasures

Find 10 treasures

Kill 30 enemies with headshots

Kill five enemies with a brutal combo

Kill 10 enemies with headshots

Find one treasure