Platinum Redux is a difficulty/enhancement ROM hack of Platinum. It aims to provide a more challenging Platinum experience with focus on teambuilding and battling. As a completed ROM hack, Platinum Redux includes all 493 catchable Pokémon.

This game is a hack of Street Fighter II: Champion Edition, notable for modifying many gameplay aspects, the most noticeable being the ability to transform into other characters and being able to pull off special moves in midair. Some of the special moves were modified, such as the Hadokens, which can either home in on the opponent or travel extremely fast, as well as 7 different characters being able to execute them as opposed to just Ryu and Ken. Zangief moves noticeably faster in this game, and E. Honda can pull off Hadokens when performing his Hyakuretsu Harite. The graphics and music are identical to those in the original game aside from the title's logo, which is now rainbow-coloured, which is where this hack gets its name from. Although there are many different revisions of this hack readily dumped and emulated, several versions are still left undumped. The rampant craziness with these hacks and the popularity of arcade distributors putting these hacks in machines was one of the reasons behind the creation of the legitimate Street Fighter II: Turbo Hyper Fighting update.

Role-playing (RPG) / Action / Fantasy
Pokémon Jade is a bootleg/pirate game which is a mod of Keitai Denjuu Telefang Speed Version. Its counterpart is Pokémon Diamond (the bootleg, not the official game by Nintendo).

Pokémon Ambrosia is a rom hack of Pokémon Crystal featuring 253 Pokémon from the first 6 Generations, an updated world map, new story, wandering Pokémon, and various quality of life features.

This is a hack of Pokémon Fire Red 1.0 that sees Blue’s perspective as he battles Red to become the Pokémon League Champion. This version (loosely) follows Lockstin & Gnoggin’s video that dealt with the theory of if Blue joined Team Rocket. Depending on what starter is chosen, your rival will either have the team they have in the game, in the Pokémon Adventures Manga, or the Pokémon Origins adaptation.

This game is a mod for Pokemon Fire Red which replaces all the pokemon with iconic Yu-Gi-Oh monsters and includes pokemon mechanics up to gen 9.

A randomizer mod for Pokémon Emerald.

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.

Moémon: Heart of Gold is a ROM hack based on the Heart Gold Version. What sets it apart from the original is the concept design.