Zippo, which has a good reputation in the field of unannounced games, indicates on its website that changes are also being made to the game. This may include music, which some contributors believe was composed by Michael Jackson, but the project left and did not want to be mentioned in the credits.

Sonic 3 & Knuckles is a double pack of Sonic The Hedgehog 3 and Sonic & Knuckles. The titles were initially developed as a single game, but were eventually released separately in 1993 and 1994 respectively. However, it is possible to combine the games via an adapter.

Earlier this year, Sega gave the 30th anniversary of the Sonic franchise a grand want to celebrate with new games, among other things. Last month it turned out that Sonic Colors may be getting a remaster.