Sonic Universe 2

Sonic Robo Blast is an early Sonic fan game from 1998, created by Sonikku, real name Johnny Wallbank, of Sonic Team Junior. It is one of the earliest Sonic fangames to exist and led to the founding of Sonic Team Junior as well as the eventual creation of it's sequel, Sonic Robo Blast 2.

Sonic and his friends found out about the Cyberspace and its inhabitants, and Robotnik is using this world to create his empire, now everyone has to try to save the Cyberspace with the power of the Cyber Emeralds. Project 32X is a fan game that attempts to revive the original Sonic Mars/Sonic 32X project.

Neo Sonic Universe is an action game developed and published by Alexandre Martins in 2003.

Its a Sonic Fan game created by Gamer Dee. Is a Side-Scroller Platformer based on the Sonic Advance series

Sonic the Hedgehog: Project Mettrix is a fan game led by Stealth, created using his own E02 Game Engine. This platform makes this game available to DOS, Windows, Linux, MacOSX, PSP (CFW), and Wii (Homebrew Channel) users, and has allowed a significant amount of mechanical evolution from the game's earlier incarnations.

Knuckles Quest is a continuation of the treasure hunting gameplay style that was present in Sonic Adventure and Sonic Adventure 2, now with a custom framework and levels. Using a radar, search the area for all the emerald pieces, but be careful: the locations are randomly selected!

This game is an experimental 3D platformer with weird references and other random stuff.

Enjoy this fangame in 2d at full speed and platform. Eggman plans to attack with his air fleet and so that sonic and tails do not bother them he will teleport along with the Chaos Emeralds to places of the past.

Blaze Rush is a 2.5D platformer similar to Sonic Rush but it only features everyone's favorite lavender feline, Blaze The Cat! Boost through levels and see if you can beat your record time while smashing and burning robots along the way!