Based on 1990 Atari coin-op.PC versions: Tandy, CGA, EGA, VGAN.B. An unfinished Atari 7800 conversion exists (see HERE).
[1] Coding by Peter Jefferies. Graphics by Richard Browne. Music by Matt Furniss.[2] Marketed/distributed by Accolade in the U.S. and distributed in Italy by Leader.