The Sludgegun is a gadget included in the Creatures 3 Norn Terrarium. It fires sludge pellets when activated which can harm creatures. The hand can fire the sludgegun by clicking the top, and turn the sludgegun by clicking the base of the gadget. It is a connectable agent.
The Creatures 3D Ecology Plan states that a Military Commander and Treasurer, Cannonous Fodderous, advised on the creation of the sludge gun.