Kill 20 enemies with the Wes - 44

Find 20 treasures

Kill three enemies with one explosion five times

Kill 20 enemies melee-attacking from behind

Kill three enemies with one explosion

Kill 30 enemies with headshots

Kill 10 enemies with grenades by aiming while hanging from a ledge

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

Find 10 treasures

Kill 10 enemies with headshots

Find one treasure

Kill five enemies with a brutal combo