Ninja Gaiden (USA) ROM

In Ninja Gaiden you play as a ninja named Ryu Hayabusa, who's father is killed during a 'life or death duel'Â� (conveyed in the opening cinematic), and who after his death left his son a note, telling him to take the Dragon Sword of the Hayabusa family and go to America to meet an archeologist named Walter Smith. So Ryu sets out on his trek to discover why his dad was killed and to 'get his revenge'Â�. What starts out as a mission to uncover what happened to his father and the reasons why he had to die, grows into a sinister plot, with plenty of twists, involving a demon and some ancient relics.  One thing to be careful about is the difficulty. This game is extremely tough and requires timing, reflexes and pure skill. Definitely a try for hardcore gamers.

This was the game that defined the term "NES hard".
As you make your way through the levels chocked full of baddies, you will fall into ditches and get assaulted by birds so much you will start throwing your controller at the screen.
And you'll love every minute of it.
I recommend this game to any gamer looking for a serious challenge.