Amstrad CPC[edit]
Developed by Emerald Software and published by U.S. Gold in Europe, in 1989.
Atari ST[edit]
Developed by Emerald Software and published by U.S. Gold in Europe, in 1989.
Commodore 64[edit]
Developed by Emerald Software and published by U.S. Gold in Europe, in 1989. Published by Data East in the US.
Commodore Amiga[edit]
Developed by Emerald Software and published by U.S. Gold in Europe, in 1989.
MSX[edit]
Developed by Clover and published in Korea in 1990. It is unusual in that this conversion was not officially released internationally, nor is it a conversion of the Sinclair ZX Spectrum version.
Sega Master System[edit]
Developed and published by Sega in 1989. Released in the US, Europe, and Brazil, but not in Japan. Contains all five stages, and most of the content, but the combat is not as fluid. Losing in a battle or boss fight sends you back to a previously passed checkpoint.
Sinclair ZX Spectrum[edit]
Developed by Emerald Software and published by U.S. Gold in Europe, in 1989.
TurboGrafx-16[edit]
Developed by Irem and published by Irem in Japan in 1989. Published by NEC later the same year in the US. This conversion is considered, by far, to be the most accurate conversion made. It is so accurate, that it served as the version which was selected for the Wii Virtual Console in 2007, and later for the Wii U Virtual Console in 2015. Almost every aspect of the game remains unchanged in this version, with the exception that fewer enemies can occupy the screen at one time, making it generally a little easier than the arcade version.
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Screenshot
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American box art
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Japanese box art
