20 years have passed by since the events on Angel Island. Sonic and Tails have been on many adventures. But now it's time for a well earned holiday.CREDITSUtopiaUK - CreatorTiddles - Various Engine Work & HelpD.A. Garden - Testing NeoFusionBox - Help With MusicDerZocker - Radon Ravine Level Art

Sonic 3: D.A. Garden Edition is a hack based on Sonic 3 & Knuckles By D.A. GardenThe project that has been in development since July 2009.the initial idea was to create a ROM hack of Sonic 3 & Knuckles that would provide the player with brand new level layouts from start to finish. In total, 13 Zones of new layouts providing 23 unique acts of game play for 3 characters, and 14 new Special Stages for you to conquer.CreditsMarkeyJester - S3K Layout Padder, SSRG Splash Screen, Invincibility Music Port and Bug FixesUtopiaUK - Testing and Bug FixesMainMemory - Testing and Bug Fixesdjohe - Testing and Bug FixesFlamewing - Bug FixesVarion Icaria - Bug Fixes

Sonic 3D: Director's Cut is a hack of Sonic 3D: Flickies' Island made by Jon Burton, founder of Traveller's Tales and the game's original programmer, with the goal of expanding the game with new content to increase replayability and to fix long-standing issues that the game has been criticized for. The project was first announced on Jon Burton's YouTube channel, GameHut, on October 12, 2017, and update videos were uploaded on a basis.A public beta test was released as an expo entry during the 2017 Sonic Hacking Contest for players to try out the game and report bugs or suggest times for the new Time Challenge mode. The finished version was eventually released on December 23, 2017 as an xdelta patch and as a download on the Steam Workshop for owners of Sonic 3D on Steam.

Sonic 3D: No Flickies is a hack of Sonic 3D: Flickies' Island made by Sik. The game remains mostly unchanged; however, the Flicky collection system (part of the core gameplay of the original game) has been removed, allowing the player to complete the levels without needing to collect all the flickies in the level to advance. This makes it much more similar to traditional Sonic games, where the goal is to simply make it to the end of the level without dying.This hack was later built upon further in the hack, Super Sonic in Sonic 3D, which was also created by Sik.

Sonic Achi is a hack based on Sonic 1 made By Natsumi adding new features.Credits:* Natsum* Markeyjester* ValleyBell* djohe* Egor* Qiuu, Owarisoft* Polly* Shoe0nHead

It's a Sonic the Hedgehog hack that includes Tails as a playable character, new/different layouts for every stage, different music ported from other Sega games, double boss fights in some zones and new moves!

Sonic And The Mystic Gems (previously known as Sonic 1 Harder Levels) is a hack made by Eduardo Knuckles and his team Harder Project of Sonic the Hedgehog on the Sega Mega Drive. It began in 2005 with the simple purpose of being a generic Sonic 1 for Sega Genesis with increase difficulty and revamped versions of the original levels. But now, it's going to present a completely new gaming experience with a new style of level layouts full of paths everywhere among new enemies, new objects, new character abilities, new menus, completely different styles of the Sonic 1 special stages and much more!Credits and Special ThanksMistergambit for his Spring Yard Zone and Labyrinth Zone level art used in the game.Tweaker for his information regarding music importing, bug fixes and the speedcap removal.HPZMan for the new sound driver instruments and the dynamic tile-set system.Selbi for some new exclusive ASM things and improvements.Master3k for sending and fixing some music.nineko for creating the xm3smps tool which was essential for the creation of some songs. Special credits to him for the different songs per act system used.SCAA for their art.Puto for his tutorial to add Spin Dash.FraGag for his tutorial to fix the spike bug.SonicVaan for beta testing.HCKTROX for the lead programming and bug fixing.GenesisFan64 for the save screen menu, for some fixes related to the fade-out and others.MarkeyJester for lots of important code and a whole load of others.Irixion for beta testing.PsychoSk8r for his the dynamic palettes tutorial.Esrael for fixing essential things in the new sound driver.Prilix Bõkun for bug searching and beta-testingEstlib for various art stuff related to levels and for additional help with creation of gimmicks and objectsDJ. Joker27 for his very big importance in specific level and misc musicMighty Arnold for additional support with beta-testing and level layout designKenny0989 for additional support in the music department Special credits to Harder Project's Team by all the useful exclusively things used in the project.

Sonic and the Secret Extended Edition (previously known as Sonic 1: The Other Extended Edition, not to be confused with Sonic the Hedgehog Extended Edition) is a hack of Sonic the Hedgehog for the Sega Mega Drive/Genesis by Hayate. It was discontinued in August 2008, after Hayate gave up on the hack due to the various bugs it had, but it was picked up again in December 2009.