Sonic Project Scramble

AzuFight: Taisen Shiyo is a doujin fighting game based on the Azumanga Daioh anime and manga series. Not to be confused with Azumanga The Fighter T-Style, though possibly meant to serve as a sequel or expansion.

Tails and the Quest of 100 Rings is a fan game created by Magnus Andersson (aka mightydillo). A demo was initially released publicly with one zone in 1997. It was only the second Klik & Play Sonic-based fan game to ever hit the internet. A completed version was released in mid-1998. A demo for this game was released in the Sonic Klik & Play Collection.

Sonic Arena is a Fighting game that was finished after 17 years.

Sonic Treading Power is a fan game made for SAGE 2023.

Daris Venture is a half-Saturn/Advance-style fan-made game that will tell you an alternate history of Mobius that ended not in the best way for the Robotnik Empire.

Dive into a frantic race with Sonic, the legendary blue hedgehog! Defy the laws of physics through twisted worlds to save your animal friends captured by Doctor Robotnik. Get ready to jump, turn and cross all obstacles in this epic adventure to save the world and free the innocent creatures! Are you ready to roar, push the limits and become the ultimate hero? It's time to show your super speed and kick Robotnik's butt.

2002, the year Sonic 2099 was released on Windows. Made and self published by TGF Team, this action game is available for free.

An upcoming Sonic fangame based on the Storybook series.