Kill 20 enemies melee-attacking from behind

Kill 20 enemies with a brutal combo

Finish the game in Hard Mode

Finish the game in Easy Mode

Find all 60 treasures

Kill 30 enemies with the MP40

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

Kill 50 enemies with the M4

Find 50 treasures

Kill 20 enemies with the Desert - 5

Find 35 treasures

Kill 50 enemies with the Micro - 9mm

Find 25 treasures