Super Mario Bros. 3
RetroLiberty's Shauntendo64 reviews the Super Mario Brothers 3 hack, Super Mario Bros. 3 remix. This is a game that I am interested in playing as it mixes elements from Mario 2, 3, Super Mario World, Mario Galaxy and Super Mario Sunshine all on the Mario 3 engine. It's a great review and the ROM hack looks like one of the more creative fan versions of the game.
I just don't even understand how you'd do this in a rom hack. How can they add reverse gravity, for example? This is so incredibly advanced.
It is and I don't really know. I think it's possible that many many years after the fact that the ROM community knows quite a bit about the system and can get it to do things that may not have been obvious at the time.