>>11825223 (OP)the NES version is basically Grinding: The Game.
there are about three places in the whole story where you might actually have to make an interesting choice between things to do. the rest of the time you are walking in circles killing stuff so you can get tough enough to move to a harder location and walk in circles killing stuff.
... that said, it's still fucking cool. if you've got the patience and aren't afraid to die, you should avoid using guides and map / explore everything yourself. you'll feel like a grizzled veteran when you finish it.