Infiltrate the snowy mountain side base.

Knife an enemy without him ever knowing you were there 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.

Find 20 treasures

Finish the game in Normal Mode

Defeat 70 enemies with the M4

Defeat 100 enemies with headshots

Defeat three enemies with one explosion

Defeat 50 enemies with the 92FS - 9mm

Defeat 20 enemies with headshots

Defeat 20 enemies with hand-to-hand combat

Play for over fifty hours

Solve 40% of riddler challenges