Defeat 20 enemies with headshots

Find 20 treasures

Defeat 20 enemies with hand-to-hand combat

Find one treasure

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

Find 55 treasures

Kill 20 enemies with the Desert - 5

Find 45 treasures

Find the Strange Relic

Kill five enemies in a row with headshots

Find 30 treasures

Kill five enemies with a brutal combo