Starts off with the same setting as Lifeboat, then takes off in a different direction.
The Spectrum and Amstrad versions were written with PAW, the C64 version with the Quill, whereas the ST version was written with STAC.
Although the screenshot shown of the Amstrad conversion states it was produced by Anthony Collins for The Adventure Workshop, this port was originally sold by Anthony Collins' own The Guild label. It's possible the title screen was adjusted when the CP/M version was later sold by The Adventure Workshop.
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For the C64 version, the map and the puzzles are slightly different (and better) from the Spectrum version.