Shadow of the Ninja, originally released in Japan as Yami no Shigotonin Kage (闇の仕事人 KAGE, The Darkness Worker Kage) and later released in Europe and Australia as Blue Shadow, is a side-scrolling action game developed by Natsume for the Nintendo Entertainment System (NES) in 1990.
It’s the year 2029 A.D. and a madman controls the largest city in America. When reports have reached the Emperor Garuda, he feels an inner chill, for he knows the invaders are Ninja!