Sonic Gaiden is a 2003 fan-made hack of the original Sonic the Hedgehog game for the Sega Genesis/Mega Drive.The hack is a co-operative effort between two noteworthy hackers in the community, Yuski the Dog and Esrael Neto. Esrael is most famous for his work on Sonic 2 Delta, a hack of the Sonic 2 Beta ROM which re-coded all the incomplete elements and restored deleted levels. Yuski had created a previous hack in 2000 called Mighty the Armadillo which was a sprite and palette hack of the U.S. Sonic 1 ROM. Sonic Gaiden was born when Esrael e-mailed Yuski a Sonic 1 ROM-hack with both Sonic and Mighty playable.

This is a Sonic 1 hack that I release a new build of each year on Halloween. This hack is mainly focused on art and music edits, however, a new monitor has been implemented in one of the zones.Credits~ASM~MegaPCM ~ Vladikcomper~Special Thanks~MegaGWolf

Controls: Press A to not die.CW: themes of isolation, mild flashing lights, and visuals that may trigger trypophobia.Created in just 12 days for Halloween 2024, this short ROM hack is all about how much of an eerie atmosphere can be achieved in Sonic 1 by removal alone.Every action carries an immediate, permanent consequence. Collecting a ring, defeating an enemy, finishing a level—each choice causes something in the game to vanish forever. The more Sonic interacts with his surroundings, the emptier the world becomes, leaving him to wander through a silent, desolate landscape. There are no jumpscares, no hyper-realistic blood, and definitely no Sonic.exe—just a quiet, decaying world. Will you keep moving forward, even as everything around you fades into meaninglessness? Or will you look for an escape?Thanks to: ajcox, Chaotic SoFa, vladikcomper, zakku, DeltaWP.S.: Inspired by Spindαsh in Sonic 2 SMS and Half-Life 2: Alone Mod. Also, I would've loved to call this hack Sonic Eraser, but unfortunately that name is already taken. At least it served as a nice palette cleanser after working on Sonic ERaZor 7 for ten months, heh.

Mobius Evolution is a heavy modification of Sonic the Hedgehog for the Sega Mega Drive created by Abyssal Leopard with the help of fellow members. The aim of this hack was initially to be a simple level layout hack, but it eventually acquired new features, such as innovative gimmicks, boss battles and other things the player might discover in gameplay.