also I dare you to beat dragons lair, milons secret castle, battletoads and silver surfer and japanese transformers for NES just to name a few tough ****s.
All the above mentioned games are known for having awful game design and the difficulty comes from retarded programming and inexperienced game developers. They are also horrible games. Difficulty coming from bad game design isn't good or fun, and it makes for awful games.
Have you played Demon's Souls or Dark Souls? If you have not, play either one, then get back to me on how hard the old NES games are that you can beat in an hour.