The Siegemaster is a giant siege tank-type semi-blimp created by Apopalypse Bloon to destroy some of Super Monkey's strongest fortress. However, when it comes across Apesworth Town and is trying to destroy its City Hall, The Monkey saw it and fought it in order to protect the town. It's a great siege weapon, but since its not built to kill infantries, it actually makes a pretty weak boss. It's driven by a big Bomb Bloon and controlled by several other Bomb Bloons that're in the back room, hidden from sight by the hull.