EMP Medal

The EMP medal is awarded for taking out an enemy's shields with the Plasma pistol, Power Drain or a Plasma Grenade, then scoring a headshot for the kill. It is only available in Halo 3 Campaign. It is represented by a 16-sided gold star with a green orb in the middle.

=Trivia=
 * The green orb in the middle looks similar to DigitalPh33r's swirl logo.