Calipso belongs to that stretch of arcade history about which collective memory and specialized documentation stay silent: it's known to have circulated as a board, but there are no solid sources detailing exact genre, developer, or year with enough certainty to state it without margin of error.
It's preferable to record that documentary gap than to invent details: as a catalog piece, it represents well the enormous volume of arcade production that stayed outside the medium's history books.
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