Sonic Hexacide

Sonic: After the Sequel (abbreviated Sonic ATS), is a fan game created by LakeFeperd that is meant to explain the events that may have taken place between Sonic the Hedgehog 2 and Sonic 3 and Knuckles. In it, the player plays as Sonic and Tails, racing through numerous zones as Sonic and Tails go out to stop Dr. Eggman from crashing the Death Egg into (and attacking), the new, mysterious island known as Angel Island. It is the sequel to Sonic Before the Sequel.

A challenging puzzle platformer inspired by games like Limbo and Badland.

Forgotton Anne is a 2d cinematic adventure game combining puzzle platforming with adventure game elements. You play as Anne, the enforcer keeping order in the Forgotton Realm, as she sets out to squash a rebellion that might prevent her master, Bonku, and herself from returning to the human world. The World of Forgotton Anne: Imagine a place where everything that is lost and forgotten goes; old toys, letters, single socks. The Forgotten Realm is a magical world inhabited by Forgotlings, creatures composed of mislaid objects longing to be remembered again.

Crackle Cradle is a 2D sidescrolling platformer/shooter developed by FoxTail. This game entails guiding the selected heroine through various areas, traps, and monsters, relying on a mixture of evasive skills and accuracy with their weapons.

Retro Sonic was a fan game project by Christian "The Taxman" Whitehead which would, later on, become the Retro Engine.

A 3D Sonic Fan Game.

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).