What game would I remake? Super Metroid...easily. That game is one of the best games of all time and I would love a high rez 2-D remake of the game.

What would I change? Not much gameplay wise. I would keep all the enemies and environments the exact proportions as they were and keep all the game play(physics and what have you) the same. This is so that the actual mechanics and design are not changed which is what made the game so awesome to begin with.

The graphics would be over hauled BIG TIME. We are talking 1080P, high quality 2D art work that flows ever so smoothly. The backgrounds would have tons of depth in the layering.

Sound effects would be over hauled a bit but not so much that they lose what they are. Some songs on the sound track would be getting the same treatment. Maybe a more eerie Maridia perhaps =D

New gameplay modes. Time Attack where it saves what weapons and health you had at the time you faced the boss on that play through. Some fun reshaped map modes where items are in different locations and going through the game but in a different path. What if we made Kraid Stronger and you had to go through the ghost ship first? I think some fun redesigns could be good.

Different difficulty levels. A new mapping system(blank and pink square don't work any more). A new system for scanning areas. I never liked how it worked in the current version of the game. That triangle could be done away with and something more realistic implemented given the technology in that suit.

Enemy spawns could be different so that when you enter a room the enemies are not always in the same spots and there is not always the same number of them.

One final experimental mode where the doors are removed from most areas. Ones where it would make sense to have less doors to keep things more open such as the brinstar while Ghost Ship would maintain most doors still. Enemies would fight each other and act more animalistic. Enemies migrate to different areas and other things. This is just another game mode but who knows.

What are the big Changes? New game modes I guess >.>