This needs to be added to the Engineer section. [b]Engineers[/b] Their armor and shielding prevents most weapons from being at all effective. The two most quick and effective weapons against them are the Plasma Pistol and "sticky" grenades. The Plasma Pistol is preferable because you simply need to hold down the trigger, wait for your lock confirmation, and fire. The EMP pulse from a single overcharge will cause the explosives mounted to the Engineer to go off, killing it and possibly a few covenant or even you if you're not careful. "Sticky" grenades will also take out Engineers in one go, but they are only advised if you are within about 20 feet of your target. Since ODSTs aren't capable of the "baseball pitch" grenade toss of a Spartan, when you throw a grenade it has a considerable amount of lob to it, so make sure you place your firearm's crosshair UNDERNEATH the Engineer. Don't forget to take into account if it is moving or not.