Find 10 treasures

Kill 10 enemies with headshots

Find one treasure

Finish the game in Normal Mode

Defeat 70 enemies with the M4

Defeat 100 enemies with headshots

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

Defeat 30 enemies with Mk-NDI grenades

Find ten treasures

Defeat three enemies with one explosion

Defeat 20 enemies with hand-to-hand combat

Complete Chapter 6 - 2 on any difficulty setting.