Well Ultimate Play The Game were huge on the Spectrum, they made Jetpac among other classics. They're Rare now
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The name 'Might and Magik' popped into my head yesterday, is that it?
I wanna guess it without looking it up (I'd know it if I'd seen it).
Ohh! - you won't get this one Dazzag...
Arguably the worlds first role playing game, share's a name very similar to a Jim Henson movie and the author also wrote a book about adventure game creation on the Spectrum. Lotsa clues but the game is old, even in speccy terms. I playtested it
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Van-B
The nature of Monkey was irrepressible!.