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Playstation 2 - Medal of Honor - Rising Sun cheats

Enter these on the passcode screen:

BUTTERFLY - Unlocks All Missions 
TANG - "Bullet Shield"  - bullets will not damage you.
GOBY - Unlimitied Ammunition 
PUFFER - "Always Sniper" - all guns to zoom like a sniper rifle
TRIGGER - "Invisible Soldiers" mode 
HOGFISH - "Perfectionist" mode 
DAMSEL - "Rubber Grenades" mode 
GARIBALDI - All Replay Items 
SPINEFOOT - Makes Everyone's Arms Huge 
SEAHORSE - Men With Hats 
TILEFISH - Silver Bullet Mode allows enemies to be killed with one shot
MANDARIN - "Achilles Head Mode" Only the headshot kill Japanese

change background in the main menu:
Move the Right Analog-stick

Multi-player costumes:
After you completed a mission and you get a medal, you also will get 
a skeleton key. This key opens a box which contains a new costumes 
for multiplayer mode. Note: There is only one box per mission.
There is no box on Pearl Harbor mission.