Destroyer Droid
these large, mobile weapons platforms were created by the Trade Federation to augment their legions of battle droids. Destroyer droids were built on a platform that could curl in upon itself in what was known as "Wheel Form," and roll into battle. Once deployed, the destroyer would unfold itself, steadying its massive form on three stout legs in what was known as the "Combat Stance." Its arms were studded with laser cannons and projectile launchers, and its head was filled with sensitive sensors and detectors used to local its targets. Models developed shourtly before the Battle of Naboo included small shield generators, and a series in development had independent, programmable computer brains that freed them from the necessity of a Droid Control Ship. The destroyer droids were also known as droidekas, and were produced by the Colicoids of Colla IV. The form of the destroyer droid mirrors the forms of the Colicoids themselves, including the ability to roll up into a ball and surprise their targets. The main drawback to the droidekas was their incredible shielding. Although precisely calibrated to form a sphere when the droideka was standing upright, it had the tendency to interpret a floor or wall from a weapon if the droideka were to tip over. Such an upended droideka experienced a catastrophic shield overload if it were knocked off its feet, as the shield systems continued to ramp up power to combat the perceived threat of the wall or floor. Eventually, the droideka exploded.