Find 20 treasures

Defeat 100 enemies with headshots

Defeat 70 enemies with the M4

Find ten treasures

Defeat 50 enemies with hand-to-hand combat

Defeat 20 enemies with headshots

Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.

Find one treasure

Completed "Those!"

Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.

Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.

Knife an enemy without him ever knowing you were there in Single Player or Special Ops.