Lee R Wilson Memorial
To get this achievement, make sure you have plasma grenades with you at all times. One of the best maps in which this is done is Guardian. Do not throw grenades randomly as enemies rush towards you. Simply line up your reticule at the enemy while they are chasing you. This is best done when they are running in a straight line. However if you are going to follow someone to stick them. It is best not to throw grenades randomly, simply predict their movement before they notice you.