Listed in one of Mr A. Knight's catalogues in November 1981 and advertised as early as May 1981 (in Practical Computing). However a later Merlin Micro Systems Ltd catalogue (shared by IanB on Stardot) suggests that the game was not ready until at least August 1982; a fact that prompted at least one complaint to the UK's Advertising Standards Authority.
This game was recovered and archived in 2022; over at Stardot.
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