I never played the first two Ninja Gaiden games, all that I herd was that they were very difficult but good. And I can say that this is how I would describe Ninja Gaiden III. I really enjoyed the game and it's style but it was really hard. The game is still a solid and impressive action game from the NES era, but it's also a game that missed out on capitalizing on its early potential. As a result, this game that could have been one of the best of its genre, and just it's another one of those action-platformers with cool ideas.
Ninja Gaiden III was the third and final installment in the side-scrolling action series in the 8-bit era, and it offers up the same core gameplay as its two predecessors, you're tasked to clear a series of stages by slashing and dodging your way through seemingly endless amounts of annoying enemies, followed by the occasional big boss.