Information on the Protoss Unit: Colossus

The colossus is unusual for the fact that it was created purely as a war machine. Most protoss robots are created for industrial or resource-gathering purposes. Even the much-feared reaver is at its core a mobile manufacturing unit re-tasked to the creation of scarab drones for long-range bombardment. The mass slaughter unleashed on the kalathi by roving colossi appalled the protoss.

At the time, the Conclave outlawed the manufacture of colossi, and existing machines were deactivated before being sealed away in distant asteroids and uninhabited moons. Centuries later the war against the zerg has brought forth these engines of destruction to do battle once more.