The Royal Space Force' are a group of robots that wanted to rebuild the Earth to the way it was before it broke to peaces. Overtime the Dieselbots kicked the working Steambots out, or at least they just quite. They will often abuse there power over the Steambots.
After Piper and her crew defeated Chop Sue the Royalists came to a bar known as Lola's and took over the place, leading Piper and her crew to head to the Core and fight against the Royalists. Even both Ace and Copperback fought against Piper's Crew only to fight another day.
It was only after Piper's Crew had to fight against the Red Queen and destroy her was when the Royalists have calmed down with their bulling.
In a DLC, their are some Royalists that went to claim a rock for the Queen, possibly unknowing of her fate, only to fight both Piper's Crew and the Voltbots but most of them were defeated.
- Red Queen (leader)
- Ace (Queen's Guard)
- Copperback (Queen's Guard)
- Royalist's Turrets
- Fire Fighters
- Monsieur Cachottiér (Neutral character)