Roboforce were seen as a protagonist faction of lego space by fans who demonstrated a catalog of them fighting the UFO's which was another sub-theme of Lego space. Roboforce featured rather large robot-like vehicles controlled by Roboforce Astronauts, one known as Chip Nebula. Most robots had an orange and green color to them and had a humanoid appearence. The Roboforce's robots were mainly powered, or collected a strange disk like element. The Roboforce sub-theme only lasted one year which was 1997.