Sonic 1 NAC Tiny Version (Tiny as in short version) is a hack based on Sonic 1 made by Campbellsonic is a simple but advanced sonic 1 hack that has different events and concepts with in each level. Therefore making each level different and unique to the standard level edits that you find in must hacks, especially some of mine. Hack Story line:One day sonic decided to take a break from his friends and the stress that he has been going through, and went back to south island. however when sonic had arrived at south island he noticed something was different, everything seem to have changed colour and seemed to be a lot darker then it use to be, And so he decided to explore. After spending 10 minutes exploring the changes; sonic noticed the that the badniks that he destroyed before had reappeared in green hill zone. Then sonic realized that robotnik was back to no good once again and goes to save south island once again. Level Information:You may notice that all of the main levels have a wall that seems to be unbreakable at the end of the level, this is because your required to find and hit an "S" monitor in order for that wall to become breakable and before your able to finish the level. Act 2 of the main green hill zone will start off normal but then you will given a platforming challenge. Act 3 of the main green hill zone is a auto running level inspired by sunset park act 3 from sonic triple trouble, where you have no control over sonic's speed or direction he is running in, all you can do is make sonic jump.Credits:Beta Tester: Sarah Mckinney (KosmoF)

Sonic 1 Remastered is a hack of Sonic the Hedgehog (16-bit) for the Sega Mega Drive/Genesis by Puto. Unlike most other hacks, the officially released version 1.1 isn't a level art/palette/layout hack as much as an "additional features" hack done in ASM. One of the major additions to the game is added with the choice of using Sonic or Tails throughout the game (selecting a character is done at the title screen). There also exists a version 2 hack which was leaked without Puto's permission, although he later gave permission to upload it onto the wiki.

Sonic 1 Special Version is Sonic the Hedgehog hack made by EditChris.This hack add new level layouts, New Art, A lot of ASM changes/add, MegaPCM driver improved and a lot of music added.

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

A work in progress hack based on sonic the hedgehog made by Animemaster.This was meant to be a little side project to Sonic 1: Sonic CD Edition I was having problems so I starting something really small. I liked the idea, and ran with it.Robotnik has got a plan to go back in time, but not like in Sonic CD, further back. I feel like he's done this before though. It's a beta, so there are unfinished art and stuff.

Sonic 1: Bouncy Edition is a physics hack of Sonic the Hedgehog for the Sega Mega Drive/Genesis by Xenowhirl. Based on the gameplay of Within a Deep Forest, the hack has modified Sonic's actions so that he is constantly bouncing. Other additional features include a snap screen, new special stage controls and the ability to use GHZ bridges as trampolines.