The Secret Level found in Prince of Persia: The Sands of Time is an unlockable level based on the original Prince of Persia game released in 1989. The level serves as a bonus to the player, with pop beer puns and with a picture of the developers.
Accessing the Level
Start a new game but don't enter the room instead click and hold the Left Analog-stick, then quickly press A, X, Y, B, Y, A, X, B. You will then enter the first level of the original Prince Of Persia game, redone in 3D.
Start a new game, stay on the balcony and hold L3 (left analog stick). Then, quickly input the following: X, Square, Triangle, O, Triangle, X, Square, O
Hold X, press space, left mouse, E, C, E, Space, Left mouse, C