Achievement Tip // That's a Knife
Perform an Assassination on an Enemy
Since the Jackals here will be distracted by other soldier, you should be able to sneak up behind one and perform an Assassination. Approach an unsuspecting Jackal (or Elite, Brute, Grunt or human) from behind and HOLD the RIGHT BUMPER down to execute a melee attack. If you are positioned correctly, you'll perform an Assassination with your knife in a cool animation.
...