Kill 20 enemies melee-attacking from behind

Kill three enemies with one explosion five times

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

Kill 10 enemies by aiming while hanging from a ledge

Finish the game in Normal Mode

Kill 50 enemies with the M4

Find all 60 treasures

Kill 20 enemies with Mk-NDI grenades

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

Kill 50 enemies with the 92FS - 9mm

Kill five enemies with a brutal combo

Find 50 treasures