It's finally been confirmed that Micheal Jackson helped with some of the games music. Brad Buxer who composed the games music has stated so in the latest issue of Black & White, which dedicates it's latest issue to the star.
Black & White: Can you clarify the rumour that Michael had in 1993 composed the music for Sonic 3 video game, for which you have been credited?
Brad Buxer: I've never played the game so I do not know what tracks the developer kept from what Michael and I both worked on, but we did compose music for the game. Michael called me at the time for help on this project, and that's what I did. And if he is not credited for composing the music, it's because he was not happy with the resulting sound coming out of the console. At the time, game consoles did not allow for optimal sound reproduction, and Michael found it frustrating. He did not want to be associated with a product that devalued his music...
Black & White: One of the surprising things in this soundtrack is that you can hear chords featured in Stranger in Moscow, which was supposed to have been composed later.
Brad Buxer: Yes, Michael and I had composed those chords for the game, and it has been used as base for Stranger in Moscow.