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

Eggman has been possessed and turned into Devil Eggman and has cursed South Island. Find the Chaos Pumpkins and undo the curse.This hack features art and music edits, new level gimmicks, and boss edits. Since 2015 I released a new build each year for Halloween. This however will be the last yearly build. While there are still changes and improvements that can be made, I am ready to move on with other projects.Since the last time this was entered into the contest I have made more changes to the art, updated some of the music, added new level gimmicks, adjusted a couple of the bosses, and fixed several bugs.Credits~ASM~MegaPCM ~ VladikcomperAdvanced Error Handler and Debugger ~ VladikcomperOptimised Scroll routine for Labyrinth Zone ~ MarkeyJesterCorrected Sonic 1 PAL Music Tempo ~ Crash~Sounds and Music~Optimised Sound Effects ~ MarkeyJesterMystic Cave Zone port from Clone Driver v1 ~ Tweaker / Puto~Special Thanks~MegaGWolf

Hellfire Saga is Sonic 3 & Knuckles hack made with great inspiration from Castlevania and Ghosts n Goblins series by Narcologer.Main Credits:Narcologer - Hack and idea.Programming:Narcologer - Bosses, badniks, HP system, cutscenes, text screens (except very first one), dialogs.TheBlad768 - Source code(modified disassembly of S3K - S.C.E), title screen with disclaimer text screen, credits screen, ending cutscene, bug fix, blood and meat.Sprites:NarcologerModgenTSRMusic ports:TheBlad768Sounds:NarcologerTheBlad768Level design:NarcologerBeta testing:TheBlad768FireratMr. CatFoxConEdStoryline:NarcologerExternal Credits:ValleyBell - midi driver, mid2smps, vgm2mid, wtmd2mid, smpsconv.Flamewing - smps2asm.Clownacy - Sonic 2 Clone Driver v2 (v2.7+ prototype).

Sonic in Paynt is a parody hack of Sonic the Hedgehog for the Sega Mega Drive/Genesis by sebmal (credited as "thehulk" in the hack as a semi-successful attempt at trolling Sonic Cult). In an attempt to make the worst hack possible, uncoordinated palettes and clashing music and were utilized.This hack is similar to the tongue-in-cheek hack Sonic 1337 by Ultima.There's also a sequel, Sonic and Tals in Paynt. It's even worse.

Sonic Kyukyoku is a sonic the hedgehog hack made by Iso_KiloTeam Kyukyoku Credits: Iso Kilo, Gemini, G4, LJ Star, Mega Team, Foxivael, DashNK, Edgy The HedgySadly, there are too many outside sources to credit. But your contribution will not be forgotten. Music, art and code was borrowed, but by too many. If I named everyone, then it could fill an entire page in itself.Hope everyone enjoys the countless hours we put into this!

Sonic Labyrinth 2 is a hack by Team Overload, Unlimited Trees.While I was creating that terrible Pespi hack, I thought to myself "Man, why can't I just play normal Sonic 2?" And then, I thought to myself "Why isn't there a sequel to Sonic Labyrinth?". So, I put my skills to the test, and created what, basically, is just vanilla Sonic 2! No major changes, aside from a few "fixes". For example, remember that annoying control lock that stopped you from jumping and moving while spinning? Well, now you can't even jump while rolling! Now there is no control lock problem to deal with, because it doesn't exist! Another thing I should add, is that there is some bug in the game. I can't really explain it, but it's not like it's noticeable or anything!. Anyways, this is just normal Sonic 2, don't bother if you don't want to play the same game again.Also, this game was created using SonED2 and Sonic 2 Github disassembly. Why did I use SonED2? Because, otherwise, this game would be impossible!Spoliers: This hack is simply just a joke hack I made while I was bored. The game IS possible (except for one problem), but it would require some skills in order to beat. You would have to go on very specific routes in order to win, as well as be very careful on what you do. My tip: Don't spindash too much. It would mess you up a lot. Also, make sure you know a lot about Sonic's physics, otherwise you wouldn't make it very far.

Sonic Legacy is a hack of Sonic the Hedgehog 2 for the Sega Genesis/Mega Drive that has been worked on since October of 2016 for the 2017 Sonic Hacking Contest. It isn't a radical departure from the original game as it is my first hack and I haven't yet learned M68K ASM.CREDITS * GAMMA V - Most custom art, most custom music, all level layouts * CRASH - Midnight Metro Act 2 and Special Stage music * JUBBALUB - Lava Canyon Act 2 music * SELBI - Sonic 2 Text Code Editor * CLOWNACY - Sonic 2 Clone Driver V2 * SCHG/SONIC RETRO - Code for various bugfix hacks * SKYLIGHTS/SPRITERS RESOURCE - S3&K Angel Island Act 1 sprite sheet (used for the top part of Marsh Palace's background) * DJOHE Background deformation removal (necessary for the custom background in Marsh Palace), VCZ/SCZ 2P custom art fixes * VALLEY BELL - MIDI2SMPS * MARIOMANIAC444 - Boss music (original composer) * LIL-G - Per-Act music changing code

Sonic Loco 2 is Tamkis' first full-blown hack for Sonic 2 on the Sega Genesis/MegaDrive. This hack aims to be a full hack, containing new elements and using chunks In unique, "crazy" ways for level layouts. The hack contains original level layouts, some new chunks, some new monitors, palette edits, and plenty of new SMPS music using the Sonic 2 clone driver. Moreover, the hack includes new zone names, hidden songs via the song monitor, a different song per zone act, and a different song per boss. In that regard, this hack is a musical Megamix too. It is the first Sonic 2 act to have edited Special stages, using Flamewing's Sonic 2 Special Stage editor.