[PS2] [Cheats] Prince of Persia: The Sands of Time
 

Unlock 3D PoP level:
Begin a new game and stay on the balcony. Hold L3, after quickly press X,
Square, Triangle, Circle, Triangle, X, Square, Circle. Note: There is no
end to the level.

Finish th game to unlock Classic Prince Of Persia:
Level - Password

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

Source? Here it is.