Cancelled releasesAlthough advertised, a Spectrum conversion was never complete; neither did an Amstrad CPC conversion which U.S. Gold advertised around the same time make it to the market.
ConversionsThe PC Booter version appears to be the only version with all four arcade levels. Most ports had two or, if you were lucky, three levels.
Intellivision versionAlthough SEGA announced four games to be released on the Intellivision, this was the only title they did release for that platform.
Information also contributed by LepricahnsGold