1. I also think Codemasters made the best games, but I'm a bit biased because I liked a lot of their games on the Amiga back in the day, especially the Dizzy games. I also think that the MegaSoft games on the 6-in-1 and the Gluk Video releases are pretty decent too, but not quite as a good as Codemasters or Tengen

2. Ultima Underworld..I know this is more of a prequel than sequel, but a NES port of this would have been awesome. I would think of non-existant game sequels, but I honestly doubt that any sequels could have beaten its prequel in terms of gameplay, originality, etc.
jajaja wrote on 21. Aug 2006 at 13:11:
Day of the Tentacle is Maniac Mansion 2. It would be really cool to see a NES version of this. There are some titles i wish had a sequel. I cant really think of many, but i would love to see Mr. Gimmick 2, Ufouria 2 and Punch-Out! 2.
Wasn't Power Punch II sort of a sequel to Punch-Out?