Metal Gear Solid: Portable Ops - PSP

Unlock Cunningham:
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.

Unlock Elisa:
Get a Medic level of 80.

Unlock Gene:
Recruit 200 soldiers and stamina kill Gene all in one playthrough.

Unlock Major Zero:
Have a MGS:DGN game save on your psp's memory stick. (Second Playthrough only)

Unlock Null:
Kill Null by stamina kill or HP kill when you face him twice and beat the game. You get him after you make a new game.

Unlock Paramedic:
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.

Unlock Python:
Kill Python by stamina kill.

Unlock Raikov:
Place spies in Western Wilderness before clearing the Guard House mission. Afterwards you should get a report of a handsome prisoner being held there.

Unlock Sigint:
After Snake is captured and rescued, contact Sigint on the radio at the Comm stage. He will need to be rescued in the town.

Unlock Sokolov:
Give the Saturn V blueprints to Sokolov.

Unlock Teliko:
Have a MGA game save on your psp's memory stick. (Second Playthrough only)

Unlock Venus:
Have a MGA 2 game save on your psp's mamory stick. (Second Playthrough only)

Unlock Extreme Difficulty:
Beat the game.

Unlock Stealth Camouflage:
Beat the game with your Technician status level at 99.