Single player

Strategy

Adventure

Hutchinson Computer Publishing

arioloasoft

The Electronic Pencil Co. Ltd.

Century Communications

cold war

detective

interactive fiction

espionage

based on - book

licensed game

cga graphics

English

Interface

The Fourth Protocol

Commodore C64/128/MAX

Amstrad CPC

ZX Spectrum

Amstrad PCW

Bird view / Isometric

A status of release where the game has gone gold. Typically this is referred to as 1.0.

Full Release

Based on the Cold War spy thriller of the same name by Frederick Forsyth.

Mystery

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The Fourth Protocol

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