Dr. Robotnik Turns Everybody into Frogs
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Retro Sonic was a fan game project by Christian "The Taxman" Whitehead which would, later on, become the Retro Engine.
A short game that envisions a world where Sonic the Hedgehog is able to slow down and take his time.
Sonic Hexacide is a Sonic fangame developed by DJ Coco using concepts based on the design of Sonic Lost World. The levels are built in a tubular 3D design, and the graphics are made of 2D sprites.
Gather your friends and see who is truly the fastest in this no hold barred fast track. Featuring many different stages through the Sonic series enhancing the stages with new features for multiplayer. Explore the world and work together to complete missions.
A Flash fangame of Sonic The Hedgegog made by Jon Graham
The game is an attempt at a mini-crossover with Sailor Moon, in which characters from that universe can be summoned by Sonic and his friends as helper characters with the use of Chaos Emeralds. It takes on an 8-bit Sega Master System style and is designed to look as authentic to the system as possible (I think).
The world is a chaotic, terrifying place, rife with all manner of monsters, warlords and hostile architecture. Even for the mighty Pachacamac clan, just the act of survival is a day to day struggle, and everybody seems to know that they can't keep it up forever. In pursuit of a safe home, a lone shaman named Ichima happens apon the Special Stage - and with it, a means of realizing their dreams of safety and peace...
A 2D Sonic the Hedgehog fangame made with Clickteam Fusion
Sonic Outbound is a Sonic fan-game set one year after Sonic Mania's bad ending where Robotnik had the Phantom Ruby and Chaos Emeralds in possession. After the final battle in the core of the Titanic Monarch, Robotnik was stuck in Little Planet and started collecting the Time Stones and preparing his greatest plan yet.
Sonic Souls is a Fan made creation, its been made with Unreal Development Kit (UDK).