PimpUigi

Sonic CD Restored is a speedrun mod that restores lost Sega CD speerun routes and features back to the game as well as polishes the video/audio/gameplay by restoring fidelity, fixing bugs, and providing small quality of life improvements. These changes do not move away from the spirit of the original game, so there aren’t new gameplay features like Flight Cancel...however Time Travel Overhaul is incorporated with permission purely because it was the original game designers’ intent for No Loading Time Travel to be featured. This has also been tweaked and polished to be as closely representative of how Sega would have made it work themselves.

Red Miso Studios

Team Galore

Enjoy your favorite levels in Sonic 3 while playing as the iconic pink hedgehog, as you jump, spin, glide, and smash your way through obstacles!

Team Conquest, Team Technical

“Sonic The Hedgehog 2: Archives” is ‘another beta hack’ that seeks to bring back cut content from the game's Prototypes, revitalize the game's concept and release levels and badniks, and fully recreate the early concept of the time-travel story. Along with this hack improves both the prototype content and the final content by adding new animations, badnik and character shots, level art and backgrounds, new music, and more.

Dynamedia Team

Sonic 1 Co-op is a ROM hack of the original 1991 game for the Sega Genesis. This modification completely overhauls the base engine to support local, split-screen cooperative gameplay, allowing a second player to join as either Tails or a duplicate Sonic.

Jdpense

RobiWanKenobi

Sonic and Tails are defeating Eggman because he took the emeralds or something, maybe the Revenge Pizza.

Cancer Edition

Team Ultrafix

Sonic Origins Ultrafix is a mod that changes, fixes and adds to various parts of the collection (including its games, the collection menus, and all the other side modes) to bring you the ultimate Origins experience!

D.A. Garden

Sonic the Hedgehog: A New Adventure is a ROM hack of the original 1991 game for the Sega Genesis. The project centers on a unique narrative where Sonic and Tails explore a reality-distorted South Island following the escape of a trapped, god-like chinchilla entity.

Team Brickheads

Sonic: Christmas Trouble is a festive, high-quality ROM hack of the original Sonic the Hedgehog for the Sega Genesis. First released for the Sonic Hacking Contest 2017, the project is a complete seasonal overhaul that replaces the standard levels with winter-themed environments.

MDTravis

Flickyhack is a unique and challenging ROM hack of Sonic the Hedgehog for the Sega Genesis. Unlike standard hacks, its core mechanic revolves around avoiding the Flickies, when you destroy a Badnik, the liberated Flickies become hostile "turncoats" that actively attack Sonic rather than helping him.

Jates

Sonic the Hedgehog in Giant Jungle is a ROM hack of the original Sonic the Hedgehog for the Sega Genesis. This hack is defined by its experimental "tiny Sonic" gimmick, which shrinks the character's sprites to give the player a much wider view of the surrounding level, though the terrain assets remain at their original size.

Zachman Awesomeness

The project reimagines the original West Side Island adventure with a narrative focused on Dr. Robotnik’s "terraformation scheme," which has transformed classic zones into surreal, expanded environments filled with new secrets and branching paths.

Speems

Sonic 2 Addendum it aims to create an enhanced, definitive version of the original game by restoring and reimagining content from unused beta versions and prototypes, alongside adding modern quality-of-life improvements.

Team Proto-Mix

Sonic the Hedgehog: Proto-Mix is a ROM modification for the 2013 mobile/RSDK version of Sonic the Hedgehog. The hack is defined by its objective to "mix" the high-speed gameplay of the final 1991 release with rare, scrapped elements found in early prototype builds and magazine scans.

Team Unborn

DeltaW

Sonic 1: The Super Challenges is a ROM hack of the original Sonic the Hedgehog for the Sega Genesis. Unlike traditional hacks that focus on level redesigns, this project is built as a mission-based experience similar to the "Mission Mode" found in modern Sonic titles.

Giovanni.gen

Giovanni's Level Pack 2 is a ROM hack of Sonic the Hedgehog for the Sega Genesis. Rather than overhauling mechanics, this hack focuses on providing high-quality, "classic-style" level design across three completely redesigned zones: Lunar Harbor, Burning Wood, and The Final Fight.

Red Miso Studios