At some point a few years ago the content creator Kaze Emanuar came up with the Chaos Edition hack.
It turns out that this niche is filled in the form of Super Mario 64 Chaos Edition. What about the people that enjoy banging their head against the wall?
With a bit of digging you can find anything from satisfying new stories to meatier challenges for experienced players. ROM hacks are an incredible creative medium for aspiring developers, as well as a content goldmine for players. Some time ago I talked briefly about ROM hacks in a blog talking about emulators.