A war machine used by the Dwarf army in Warhammer Fantasy, a table-top war game. The Organ Gun was derived from a musical instrument designed by Dwarf Engineer Lokri Snarrison, called an "organ." The instrument was not well-liked by other Dwarven Engineers, and so another Engineer named Durin Kurganssonson took the organ's pipes, laid them flat, and made an impressive cannon with five barrels.
The Organ Gun fires five smaller cannonballs from its barrels, which do less damage than regular cannonballs. However, the Organ Gun has the ability to fire up to ten times in one attack, as compared to just one attack for a normal cannon. This makes the Organ Gun quite formidable, and one of the centerpieces of artillery in a Dwarf army.