Complete "Incoming!" challenge

Complete "Kaboom" challenge

Complete "Slayer" challenge

Complete "Kick In The Back" challenge

Complete "Leap Up!" challenge

Finish the game in Normal Mode

Find 30 treasures

Kill 30 enemies with the MP40

Kill 50 enemies with the AK-47

Find 25 treasures

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

Kill 20 enemies with a brutal combo

Find 10 treasures