Kill 20 enemies melee-attacking from behind

Kill 10 enemies by aiming while hanging from a ledge

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

Kill 20 enemies with a brutal combo

Finish the game in Hard Mode

Finish the game in Easy Mode

Find 30 treasures

Kill 30 enemies with the MP40

Kill 50 enemies with the 92FS - 9mm

Find 15 treasures

Kill 50 enemies with the Micro - 9mm

Kill 50 enemies with the AK-47