Various cheats

Unlock Original Prince of Persia Level 1 in 3D:
     Start  a New Game and stay on the balcony. Press L3 then press X,
Square, Triangle, Circle, Triangle, X, Square, Circle.

Prince of Persia Passwords:

KIEJSC Level 2 
VNNNPC Level 3 
IYVPTC Level 4 
RWSWWC Level 5 
GONWUC Level 6 
DEFNUC Level 7 
SVZMSC Level 8 
DBJRPC Level 9
MZFYSC Level 10 
BRAYQC Level 11 
UUGTPC Level 12
LRARUC Battle with Jafar 

Unlock the Original Prince of Persia:
     Complete  the game and Prince of Persia 1 will be playable in the
extra options menu.

Unlock Prince of Persia 2:
     When  you  receive  a  new  sword  around  33%  through the game,
continue  on  until  you break a wall and the Prince says, ''It's said
they built this palace on the ruins of another...'' Once you cross the
next  room,  you  will  find  a rotatable switch. Directly behind this
switch  is  a breakable wall, although it doesn't appear to be. If you
hit  it three times, you will find another room and you will receive a
message informing you that Prince of Persia is now unlocked.

     Note:  You can also rotate that switch until it points to the new
room  and it will open a gate that allows you to play Prince of Persia
2  right  there  without  having  to  exit  back to the Extra Features
screen.