Sonic 1: Painto Edition 2 (or simply Sonic: Painto Edition 2) is a modification of Sonic the Hedgehog (16-bit), and the first part of the Paintifisation project, made byPainto maniak. The hack contains many features, and is named 'Panto Edition 2' to separate itself from Painto maniak's previous hack; Sonic: Painto Edition (later renamed Sonic: Christmas Island).

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 Control is a hack of Sonic 2 by MainMemory. It changes Sonic and Tails' movesets to be similar to Sonic Adventure.

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 Armageddon Game is a hack of Sonic the Hedgehog 2 for the Sega Mega Drive/Genesis by xenoSonic. The layouts of the first four zones of the game have been altered, with the rest of the original levels unaltered. Additional levels are planned, but as yet are not implemented.

Sonic 2 Build A Burger is a hack based on Sonic 2 that captures the spirit of customization to a full "T". Thanks to the revolutionary menu system created my Vladikcomper, this hack now takes your experience of Sonic the Hedgehog 2 and multiplies it ten fold. Nearly every kind of option for your custom Sonic 2 has been considered and placed in the easy to use menu system. Because of this, each person can now create a custom Sonic 2 game at the touch of a button without ever having to mess with an external website, download links, or whatever else.

Sonic 2 Delta is a groundbreaking series of ROM hacks by famed Sonic scene member Esrael Neto, which restores several deleted levels and prototype elements to Sonic the Hedgehog 2 for the Sega Mega Drive / Genesis. Various features of Sonic 2 Delta, common across the series despite the existence of several versions/branches of the hack, include the use of art and music from the betas and Sonic the Hedgehog and re-implementation of badniks that had been removed from the final game. The level order of Sonic 2 Delta is also similar to the original intended order, rather than that used in the final version. The main version of this hack is entitled Sonic 2 Delta and was based upon the Simon Wai prototype, before version 0.24 transferred the codebase to 'revision 2' of Sonic 2 from Sonic Compilation. More information on the various lineages and their history is detailed in the section "Other versions" below. A hack similar in concept, called Sonic 2 Long Version, has been released by another hacker, Sonic Hachelle-Bee.

Sonic 2 Delta is a groundbreaking series of ROM hacks by famed Sonic scene member Esrael Neto, which restores several deleted levels and prototype elements to Sonic the Hedgehog 2 for the Sega Mega Drive / Genesis. Various features of Sonic 2 Delta, common across the series despite the existence of several versions/branches of the hack, include the use of art and music from the betas and Sonic the Hedgehog and re-implementation of badniks that had been removed from the final game. The level order of Sonic 2 Delta is also similar to the original intended order, rather than that used in the final version. The main version of this hack is entitled Sonic 2 Delta and was based upon the Simon Wai prototype, before version 0.24 transferred the codebase to 'revision 2' of Sonic 2 from Sonic Compilation. More information on the various lineages and their history is detailed in the section "Other versions" below. A hack similar in concept, called Sonic 2 Long Version, has been released by another hacker, Sonic Hachelle-Bee.