Sonic Recharged

Storyline

"Sonic Recharged" is a fangame that takes place after the events of S3&K in an alternate timeline, this timeline consists of Sonic, Tails, and Knuckles as they go through new strange never before seen zones within Angel Island. Robotnik isn't alone on his endevours this time around, as he's created a perfectly equal Eggrobo. But as most of the plans for the doctor fail, the Eggrobo still shares his old memories from the events of S&K which leads the crazed machine to target Knuckles and Knuckles only.

Source: IGDB