
Sonic 1: South Island Definitive is a hack by RadiantNexus Team, which seeks to reimagine Sonic 1 by rearranging levels. remixing music, adding features from future games, and readding scrapped ideas in new and interesting ways. Major features: 3 acts of reimagined level design, including one act that has yet to be fully reimagined in any other hack. A miniboss. Massive art overhaul all over the place. Music made by ProjectFM and MechaKnuckles. Menus! A custom splash screen. There's been massive engine overhauls as well, including the Sonic 3 level layout format for massive levels, and the Sonic 3 object manager to go alongside this.

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.

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.


Sonic Sunventure is a ROM hack of the original Sonic the Hedgehog (1991) for the Sega Genesis. It features redesigned levels, new mechanics, custom music, and updated visuals with a time travel theme.

Sonic 3: D.A. Garden Edition is a ROM hack of Sonic 3 & Knuckles created by D.A. Garden. It aims to be a "vanilla" but complete and fully featured take on S3K, with 23 acts of new level layouts matching the scope and size of the original game. In 2020, a user named Thorn ported the hack to the Sonic 3 AIR project as a mod, allowing it to be played with the additional features AIR provides.

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.

The Sonic 1 Easy Mode hack is a modification primarily designed as a "port" of the official Easy Mode found in Sonic Jam on the Sega Saturn. It focuses on making the 1991 classic more accessible by altering core game structures and level designs.