Work-in-Progress re-design. Sorry for eventual bugs.
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Gaming History GH

The Fourth Protocol [Model CN 06731]

40 Years old Amstrad CPC cass. Century Communications

The Fourth Protocol [Model CN 06731] © 1986 Century Communications

SOURCES
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game's cassette.
game's screenshots; http://www.cpc-power.com/index.php?page=detail&num=2634