Centurions are large Hunter-Killer robots created by SkyNet and can be described as monstrous metallic spiders (though they only have four legs). They walk across the war-torn ruins of the future on four multi-jointed legs which can climb over human barricades. The Centurion's upper body can rotate 360 degrees and each arm carries a phased plasma cannon. They are outfitted with infra-red sensors like all H-K's and can also deploy Silverfish from their lower sections to rush behind enemy lines and blow up human strongholds.

In the event of SkyNet's destruction, Centurions are programmed with an autonomous sub-routine, essentially granting them free will and enabling them to rally any remaining SkyNet units should the Resistance win the war.