Sonic CaDa is a hack of Sonic the Hedgehog by CamManS5.This hack features, new music, new art, secret paths, and multiple end points in each level that offer different rewards. The Special Stages have been changed into Bonus Stages. There will be new Special Stages based on the 2D Special Stages found in Sonic Triple Trouble. Since the new Special Stages are not implemented yet, the Chaos Emeralds cannot be collected at this time without cheating.

Sonic Chaos Quest v2.0 is a modification of Sonic the Hedgehog. Story:Exploring Mobius seas Eggman found the Chaos Island. It has giant lake, on bottom of which the sunken ruins of Chaos Shrine which contain the inexhaustible power of Chaos are lying. In order to increase the power of his mechanisms Eggman built the Hydrostation on this lake and plans to conquer the world with the power which he got. Residents of the island asked Sonic for help, so he teamed up with Mighty, Tikal and Metal Sonic to start their Chaos Quest to stop Eggman's evil plans once again!Credits:Programming: Narcologer, Vladikcomper, TheBladNew level art: Narcologer, ShooterNew chunks and layouts: NarcologerSprites: Narcologer, The Spriters Resource, SCAA, Lone DevilMusic: Ivan YO, EgorTC, Nineko, TheBlad

Sonic Classic Heroes is a ROM hack for the Sega Mega Drive / Genesis that is the result of a collaboration between flamewing and ColinC10, combining their respective hacks Sonic 2 Heroes and Sonic 1 and 2. It therefore is a single ROM that offers the entire campaigns of Sonic the Hedgehog and Sonic the Hedgehog 2, either alone or together; and enables the player to play as many characters such as Sonic, Tails, and Knuckles. The hack is named due to the ability to control a team of characters, which is reminiscent of the more recent 3D game Sonic Heroes. The hack is built on Sonic 2's engine, which has been enhanced by both flamewing and ColinC10 to have new features. These include: multiple gameplay elements from Sonic 3 & Knuckles, such as element shields and character-specific abilities; the ability to save progress, scores, etc. to SRAM (something rarely implemented in Sonic 2, with the other notable example being Esrael's Sonic 2 Delta); various bug-fixes and improvements to the mechanics of the original games; and many more features, both implemented and planned.

Sonic Double Dash is a hack based on sonic 1 that greatly revamps the first zone into something that you'll hopefully consider fresh and fun. Technical changes are relativly minimal as the hack has a greater focus on creating new layouts and artwork. The levels are built with the new double dash in mind, a redesigned drop dash that's power can change the flow of how you play, epscially useful for speedrunners or those who just want to have a good time. Forget that last part as it makes this sound like a dating profile.