Unlockable: Stealth Camouflage
You must defeat the game with Technician status level at 99.
Unlockable: Extreme Difficulty
Complete the game.
Beat Cunningham on any difficulty by stamina kill and beat the game before January 1st 1971 in game. You get him after you make a new game.
Unlockable: Para Medic
You must Contact her on the radio on the Comm Tower stage. She will later need to be resceud in the hospital stage. Place spies in the hospital.
You must get a Medic level of over 80, with the second number as an odd number.
Put a MGA game save on your psp's memory stick.
You must give the Saturn V blueprints to Sokolov.
After Snake is captured and rescued you can contact Sigint on the radio at the Comm stage. He will need to be rescued in the town.
You must beat Python by stamina kill.
You must acquire a medic level of 80.