Short Description Interplanetary Missiles destroy enemy defenses. Long Description Interplanetary Missiles (IPM) is your offensive weapon to destroy the defenses of your target. Using state of the art tracking technology, each missile targets a certain number of defenses for destruction. Tipped with an anti-matter bomb, they deliver a destructive force so severe that destroyed shields and defenses cannot be repaired. The only way to counter these missiles is with ABMs. Each extra level of your missile silo developed can store 10 ABMs, 5 IPMs, or a combination of both missile types.