Hmm. Never played Metal Dungeon for Xbox, but then again, I knew it was going to be horrible, so I didn't even think to pick it up.
One of the worst mistakes to happen to an RPG or RPG-themed game was a long lost Zelda game made specifically to run from CD. It was a game with Link and done in that Dragons-Lair laserdisk style of gameplay. And while that kind of arcade gameplay worked well with Don Bluth's great direction, animation, and quirky humor; the Zelda game fell quite flat and was a bad experience for any Legend of Zelda fan waiting for something Zelda-like to happen in gameplay.
I happened to have missed out on that one, and any Zelda fan I've spoken to, that has played that game, mentioned that I should forget that it ever existed. Still, it is sometimes hard to resist remembering a game that left that bad an expression on you. I mean, if you had the experience, how can you forget the awefulness of the D&D fighting game, Iron and Blood? It's just one of those games that remind you that the devil exists and that if time could take something back to the deep-place it came from, make it be that......thing. Still, I can't help but think that even that Zelda game couldn't be THAT bad.