Find the Strange Relic

Kill 100 enemies with headshots

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

Kill five enemies in a row with a brutal combo

Finish the game in Easy Mode

Kill 50 enemies with the M4

Kill three enemies with one explosion

Kill 30 enemies with the MP40

Find 20 treasures

Find 15 treasures

Kill 50 enemies with the AK-47

Kill 50 enemies with the PM - 9mm

Kill 10 enemies with headshots