A team of Sonic fans known as Gistix have been working on a remake/fan-made version of Sonic the Hedgehog from 2006 for the PC. This version of Sonic 06 is powered by a popular game engine Unity. Gistix has just released a public demo for it.
As always, we strongly suggest downloading as soon as possible.
Sonic 06 is a platform action-adventure game with elements that allows the player to play as Sonic, Shadow and Silver across several stages.
Interested in the fan-made game? It can be downloaded from here.