Its protagonist, who eventually confronts the chief villain in the Amazon, could attack much faster than normal through a glitch involving jumping, pressing B, and pressing and releasing the down button.  It was a cover feature for the fifth issue of
Its protagonist, who eventually confronts the chief villain in the Amazon, could attack much faster than normal through a glitch involving jumping, pressing B, and pressing and releasing the down button.  It was a cover feature for the fifth issue of Nintendo Power, (+) and a novelization of this game for the Worlds of Power series changed the story so that the protagonist's orange-clad father lives at the end rather than being brainwashed and turned into a demon.  Players were repeatedly forced off cliffs and grabbed by eagle talons in the notoriously hard Area 6-2 (*), while in other parts the protagonist visits Walter Smith and falls in love with Irene Law, a CIA agent.  Players can defeat bosses like Bloody Malth, Barbarian and Masked Devil through the main character's "spiritual strength", as well as more traditional weapons like a katana.  FTP, identify this NES game which was revived in a 2004 Tecmo game starring Ryu, known for its extreme difficulty and Sigma expansion pack.
Its protagonist, who eventually confronts the chief villain in the Amazon, could attack much faster than normal through a glitch involving jumping, pressing B, and pressing and releasing the down button.  
{Ninja Gaiden} (or {Ninja Ryukenden} or {Shadow Warriors}) [1]