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

Kill 20 enemies melee-attacking from behind

Finish the game in Hard Mode

Kill 50 enemies with the SAS - 12

Kill 20 enemies with Mk-NDI grenades

Kill 20 enemies with the Wes - 44

Kill three enemies with one explosion

Kill 20 enemies with a brutal combo

Finish the game in Easy Mode

Find 25 treasures

Kill 30 enemies with the MP40

Find 20 treasures

Find 15 treasures