Fourth Protocol, The (1985)(Hutchinson Computer Publishing)(Part 3 Of 3)[a] ROM Download can be obtained free for ZX Spectrum on EmuGames.net only. Play emulator game in English for the USA region. Fourth Protocol The is a ZX Spectrum ROM that you can download to your computer or play online within your browser. You can also download roms such as Sony Computer Science Kenkyuusho Mogi Kenichiro Hakase Kanshuu Nou Ni Kaikan Minna De Aha Taiken and Computer Noryoku Kaiseki Ultra Baken that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.