Super Mario 64 Chaos Edition is a romhack made by Kaze Emanuar in 2014 and contains 130 stars. This hack doesn't change anything in any of the games level. But this utilizes a Special Gecko Mod (or Gamesharks) which allow it to automatically activate and deactivate random codes at random times. This hack is made to challenge players to play through Mario 64 while the random codes either impedes or helps with any progress through the game.
Gravity Swap 64 is a ROM hack of Super Mario 64 which makes the gravity direction change each 30 seconds. It also has a challenge mode.
Platform / Adventure / Action / Fantasy
This is a complete hack of Super Mario World. Don't expect any new graphics here; this game is all about the level design. All the levels and worlds are new, and some of the worlds have themes not present in the original game, such as a water world and an ice world.
Super Mario Star Road is a rom hack of Super Mario 64 and can be considered a sequel to that very game. It contains over 120 stars, more than 30 new areas, nearly 50 new tunes, and many other new features.
Mario's New Earth is a ROM hack/mod of Super Mario 64 created by PixelSM64, with 125 Stars.
Sunshine Secret Book 64 is a ROM hack released on December 2, 2019 by Dan-GPTV. The hack has 40 Shine Sprites to collect, and they are spread across 5 main levels and 3 secret levels. This hack has multiple custom objects in it.
Blast your way through good ol' Mario 64 with a SHOTGUN! A completely new shotgun mechanic complete with firing, a jump-boost, an aiming mode with a crosshair, and many unique interactions to make for a fresh SM64 experience. This initial version game took around 200 hours of work to make.
A Banjo-Kazooie ROM hack which puts Banjo and Kazooie in Clock Town from The Legend of Zelda: Majora's Mask.
Super Mario 64 Randomizer is a ROM hack/mod of Super Mario 64 that is able to generate random assets placements in the game, making the game different in every play session.