This series of bipedal robot assassins is designed to locate and destroy specific targets. Once a target has been programmed in, there is nothing that will stop an HK-unit from completing its task, save complete destruction. HKs are remorseless, single-minded killing machines.
Hunter-Killers come in a variety of models. The basic HK-500 is a armed metal robot; the HK-1000 adds a layer of organic flesh to help it blend in; and the deadly HK-X is made of liquid metal and is able to change its shape as needed.