The original Ninja Gaiden is still considered by many, myself included, to be one of the most notoriously hard games ever. It took my forever and a day to eventually reach the very end (Ch. 6-4). The only thing that REALLY pisses me off is the fact that if you die while fighting your dad or Jaquio, you have to start ALL the way back at the beginning of the chapter (6-1). I actually broke one of my controllers out of frustration. Eventually, I beat the dad, Jaquio, and the Alien and a wave of relief swam over me that I still to this day remember.