The Egg Engines is a large factory-turned-ship which serves as the Metal General's means of transport and base of operations. It first appears in the movie The Metal General, but later reappears in The Shadow of Sir Grodus and Strong World, wherein the Secret Society of X-Nauts are forced to use it to avoid any negative precussions with the Shattered World Crisis. The entire ship was originally constructed by the Haltmann Works Company.