Ninja Gaiden 3 is an action-adventure video game developed by Team Ninja and published by Tecmo Koei.
The game is the first in the modern series to be directed by someone other than Tomonobu Itagaki, the former franchise director. In his place is Yosuke Hayashi, the creator of the Sigma remakes.
The game explores Ryu Hayabusa's more human side as he descends into a hellish realm. The history involving the Fiends and Archfiends from the previous titles is not explored this time around, and instead involves a mysterious cult of alchemists seeking to destroy the world as we know it and create a new world order, with Ryu as the catalyst.
Source: Wikipedia, "Ninja Gaiden 3", available under the CC-BY-SA License.