Rarity:
One version is common, at least one other version is rare
Notes:
[1] Original code by David W. Bradley; Amiga conversion by Gary Speegle. Digitised sound programming by Jeff Noyle and David Triggerson; sound FX by Steve Miller.
[2] Distributed by U.S. Gold in the UK, albeit 2 years after its release in the U.S. by Sir-tech.