Star Wars: Episode 1 - The Phantom Menace

Debug mode (U.S. version):
Highlight "Options" at the main menu, but do not select it.
Press Triangle, Circle, Left, L1, R2, Square, Circle, Left.
A beep will confirm correct code entry.
Hold L1 + Select + Triangle. A droid test debug menu with level select, FMV sequence, sound test, and invincibility options will appear.
To start on a new selected level, exit the cheat menu and start a new game. The game will begin on the level selected.
To watch the FMV sequences or hear the game sounds, highlight the desired clip and press X. Hold L1 + Select + Triangle to return to the menu at any time. (Information from Cheat Machine)