"Sonic X Freedom Planet" that's "Sonic Cross Freedom Planet". A game that crosses the universes of [Sonic The Hedgehog] and [Freedom Planet].You will be able to play as [Three] characters once we've managed to implement them all.This hack came about after I completed the hit indie game "Freedom Planet" which started off as a Sonic fan-game.Ever since beating it I've always wondered how Lilac would look and feel in the Sonic environment. And this is the start of something great I feel.This hack made by "Team Chasers" and based on Sonic 1.

Sonic Zeta Overdrive is a hack of Sonic the Hedgehog 2 for the Sega Mega Drive by Mikel. Plans as of now include adding the Centisecond timer.

Super Sonic in Sonic 3D is a hack of Sonic 3D: Flickies' Island made by Sik. This hack allows the player to turn into Super Sonic in said game after collecting all sevenChaos Emeralds, mimicking its prequels Sonic 2, Sonic 3 and Sonic & Knuckles. The rules are borrowed from the latter two games, so the player must double jump to transform and also must not have a shield in that moment, besides the basic requirements (having all emeralds and 50 rings).All of Super Sonic's behaviour is implemented: a custom palette, a transformation pose with a fading palette, invincibility (with stars), speed shoes and a music change upon transformation. Rings drain while transformed as well. Super Sonic can still be killed by getting crushed by some falling platforms, however, so he isn't completely immune to death.This hack is based off Sonic 3D: No Flickies, and as such it shares the same gameplay rules.

Toei Sonic 3 & Knuckles is a Sonic 3 & Knuckles hack which adds Sonic based on the Sonic CD opening. Made by The One Musaab.