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Press Keyboard right side: Alt+Enter keys to switch to full screen game play, and Alt+Enter keys to return.

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How to play The Fourth Protocol

Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse.

The Fourth Protocol Description

The Fourth Protocol for DOS

Cheats/Hints/Walkthroughs for The Fourth Protocol

No posted cheats for this game yet.

Platform
DOS
Game year