A great hack for Sonic the Hedgehog hack made by MarkeyJester features new enemies, layout, music,etc..Credits:3rd Act Layout - Gallium Grant.Gameplay Testers - iojnekns, snkenjoi, EditChrisBug finders - DAGarden, qiuu, Selbi, SonicVaan

Sonic 1: Reverse Curse is a hack based on Sonic 1 made by Campbellsonic Story:Sonic the Hedgehog has been cursed! Now, when he collects rings, his rings counter counts DOWN instead of up! And if he collects a ring when he has a counter of 0, it's lights out. Sonic 1 never seemed so... Intimidating.CreditsMain programming, modifications, ideas, and general everything except for stuff listed belowCampbellsonicMusicvladikcomper - Ported music used in GHZ3, MZ2, SYZ3, LZ2, LZ3, SLZ3, and SBZ2 (I got them from S1 Hacking Studio; and no, I didn't use that to make this hack, just the music)nineko - SLZ2 music (his port of Sky High Zone from Sonic 2 8-bit)ValleyBell - Created S3K to S1 SMPS Converter, which I used to port the music used in GHZ2, MZ3, SYZ2, SBZ1, all Boss acts, and Speed Shoes.Tutorials usedAdd Spin Dash - By Lightning, Puto, shobiz, and MercuryPlay Different Songs on Different Acts - By ninekoPort the REV01 Background Effects - By jman2050How to Add one more Act in Sonic 1 - By Eduardo KnucklesChange Spike behavior in Sonic 1 - By FraGagFix the Walk-Jump Bug in Sonic 1 - By Cinossu and MercuryProbably some others I forgot, so if you see anything that you think was from a tutorial, tell me.Utilities usedSonED2 - By StealthSonMapEd - By XenowhirlSpecial thanksGreen Snake, flamewing, MainMemory, and Clownacy for pointing me in the right direction on porting Sonic's S3 spritesI had no idea what a DMA queue was, silly me

Sonic 2 Adventure Edition is a hack of Sonic 2 by MainMemory, based on Sonic 2 Adventure Control. It transplants various gameplay mechanics from Sonic Adventure to Sonic 2.

Sonic 2: Advanced Edit is a Sonic 2 hack created by rika_chou. The latest release features 3 new levels. Other (incomplete) levels can be accessed by using the level select menu. As of release 3, Sonic 2: Advanced Edit has officially been discontinued.

Made by Team AE Sonic 2 Advanced Edit features 7 entirely new zones, each full of unique enemies and with a boss whose gameplay varies depending on which character you play as. Playable characters are Sonic, Tails, Knuckles and Amy. Furthermore as bonus content, the hack features the 5 zones from the 2008 release, brushed up to be fully playable. Upon completing the 7 main zones, you obtain a code to access the level select from which you can play the bonus zones by selecting "South Island 1".

Sonic 3 & Knuckles: Pro Survivor it's an palette and layout hack; the point on this one it's to have a extra difficult and hard layout (though fair), with some improved gimmicks.In the last year, I wasn't very happy with the state of the hack, so this one I decided to give it a better effort and polish everything with my best effort (with new content, of course)!Unfortunately, it's still just a demo and not a full version. So the 5 only levels available are:Angel Island Zone, Hydrocity Zone Act 1, Ice Cap Zone, Flying Battery Zone and Sandopolis Zone (unfortunately too, AIZ and ICZ2 isn't ready yet for Knuckles, so I hope you understand).Also, has a new Main Menu and a New mode (up to you unlock), and in the future will have more features.Now let's go to the credits.CreditsHack Author, Layout and Level Design:*NeoFusionBox Team

Sonic 3 and Knuckles Time Travel is a Sonic 3 and Knuckles hack made by Jdpense featuring :- New menu screen (WIP) - The ability to time travel like in SCD (ofc)Credits:- Stealth for SonEd2 (newest version)- Xerowhirl for SonMaped- Flamewing for the improved S3k Sound Driver