Kill 2 enemies with a single bullet 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.

Finish the game in Easy Mode

Defeat 50 enemies with the Dragon Sniper

Defeat 20 enemies with the Pistole

Defeat 100 enemies with headshots

Defeat 70 enemies with the M4

Defeat 30 enemies with Mk-NDI grenades

Defeat 50 enemies with hand-to-hand combat

Defeat 20 enemies with headshots

Defeat 20 enemies with hand-to-hand combat

Find one treasure

Collect 25% of the prize bubbles on the story levels