Sonic Clackers

Sonic Clackers (also known as Sonic Crackers and Sonic Stadium ) is an unreleased video game in development around 1994 for the Sega Genesis; the game would eventually be reworked as Knuckles' Chaotix, which released for the Sega 32X in 1995.

The ROM was first released online by a Belgian hacking group named Morgoth on June 15, 1996, with the ROM being dated April 1, 1994; the April Fools date lead many people to believe the ROM was a hoax, however data found in a few Chaotix prototypes would disprove this. Due to its early build date, the game is vastly different from the final, with the player controlling Sonic and Tails through four available levels; despite it, much of the gameplay of the final Chaotix, including the tether mechanic, have been implemented, albeit very basic.