I'm playing through all of the Metroid games (some for the first time) and so far, I've enjoyed all of them. I haven't started up Super or Metroid 2 yet. I think it's safe to say that, while great, Metroid Prime 2 is the weakest of the mainline Prime games, and we all know about Other M. So this got me thinking. What's the worst of the 2D games? I'm curious to hear some opinions.