1991 · Platform · Arcade · Nintendo Entertainment System
They struck without warning, wiping out the Earth's defenses in one master stroke. Cities were crushed, and the invading aliens showed no mercy! A small resistance force of Ninja, refusing to be conquered, still remained to fight the evil Inimicus. A daring plan was devised by the Ancient Ones to send out two special Ninja, and annihilate the alien threat once and for all!