O Monstro Marinho joins the Portuguese-language software catalog that circulated in Europe during the 80s, a market considerably smaller and less documented than the British or Spanish ones, but with real production of its own. The name suggests an adventure or action premise set at sea, with a giant creature as the central threat.
There isn't enough reliable documentation to pin down its specific development with certainty, so we prefer to acknowledge that gap rather than invent data: it's one more piece of that scattered Lusophone catalog, of interest to the curious collector.

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