CheatCodes.com has all the official Defcon 5 PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Friday May 24, 2013 for Defcon 5 are shown below.
Access any VOS terminal in the defense station, enter the "Communications" option, and choose "Local Communications". Then, press Triangle when the message stating that option being unavailable appears. Then an Asteroids-like game will begin.
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