Spelunker is one off the top of my head. So many different versions of that game and the NES is, so far of what I've played, the worst port of all. While some of the annoyances exist still from the older versions such as dying in mid-air after a long fall, at least you have longer to fall rather than two centimeters. It's still fun to try trying to beat the first level! Which.. I have yet to do. >_>

Another one is Hydlide. I know there's a way to beat it, but damn it's awful. I almost have to mute it to even tolerate it, let alone the battle system is one of the worst out there. I can understand the battle system of the old DOS game, Rogue, where you simply walk into an enemy to attack, but c'mon that was in 1980, Hydlide is an NES game with two completely functional buttons, they could've at least given us attack methods like Crystalis or The Legend of Zelda. Hell, even Ys is better than that crap. But even still, it's interesting to play it to see how bad it is.

I, personally, don't find A Nightmare on Elm Street or Friday the 13th bad at all, in fact, I enjoy them, especially Elm Street. I find them both completely playable, the music isn't too awful (while repetitive, but A Nightmare on Elm Street has a good variety of music all of which is well-composed in my opinion) and has some pretty intense combat at times. Friday the 13th can actually be scary at times, it's one of the few games where I actually jump. A Nightmare on Elm Street didn't have that startling factor for me, though it was quite eerie. The rest of LJN's games though.. Heh. Kind of like their Roll N' Rocker, just a piece of crap encased in plastic.