Kill five enemies in a row with a single punch, after softening them up with gunfire

Finish the game in Easy Mode

Kill 50 enemies with the M4

Kill 30 enemies with the MP40

Find 40 treasures

Find 35 treasures

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

Kill 20 enemies with the Desert - 5

Kill 50 enemies with the Moss - 12

Kill 20 enemies with Mk-NDI grenades

Find 20 treasures

Kill 100 enemies with headshots

Kill five enemies in a row with a brutal combo