Gex 3: Deep Cover Gecko Codes -

Invincibility:
Pause game play, highlight the "Exit" option, then hold L2 and press Down, Up, Left(2), Triangle, Right, Down. A sound will confirm correct code entry.

Gex quotes:
Pause game play, highlight the "Exit" option, then hold L2 and press Down, Right, Left, Circle, Up, Right. A sound will confirm correct code entry. Resume game play and press Select to force Gex to make a comment.

3D camera:
Pause game play, highlight the "Exit" option, then hold L2 and press Up, Down, Up, Down, Select, Select.

Debug menu:
Pause game play, then hold R2 and press Up, Circle, Right, Up, Left, Right, Down. Resume game play and press Select to display a list of options including level select, sound debug, collectibles, and more. Note: For the PAL version of the game, pause game play, then hold L2 and press Up, Circle, Right, Up, Left, Right, Down. Warning: If the debug menu code is active, and any of the FMV vault codes are used, the game cannot be saved since the pause feature will be disabled.

Vault codes:
To enter the following vault screen passwords, play the hidden level and get all four vault "secret" keys. The passwords are entered at the vault screen.

Eight Hit Paws
Enter Square, Diamond, Triangle, Triangle, Star, Diamond as a password at the vault screen.
Extra life
Enter Triangle, Circle, Star, Square, Square, X as a password at the vault screen.
Ten lives
Enter Square, X, Circle, Circle, Triangle, Square as a password at the vault screen.
Invincibility
Enter Square, Star, Triangle, Square, Triangle, Diamond as a password at the vault screen.
Toggle timer
Enter Square, Square, Diamond, Circle, X, X as a password at the vault screen. The timer may be turned on or off at the "Extras" screen.
Play as Alfred
Enter Square, X, Triangle, Square, Star, Star as a password at the vault screen. This is no longer effective after you leave Gex's HQ.
Play as Cuz
Enter Square, Diamond, Square, Square, Triangle, Diamond as a password at the vault screen. This is no longer effective after you leave Gex's HQ.
Play as Rex
Enter Square, Star, Star, Square, Triangle, Triangle as a password at the vault screen. This is no longer effective after you leave Gex's HQ.
Play as DracuGex
Enter Star, X, X, Circle, Square, Triangle as a password at the vault screen. This is no longer effective after you leave Gex's HQ.
Gangster channel FMV sequence
Enter Circle, Triangle, Square, Star, Diamond, Star as a password at the vault screen.
Western channel FMV sequence
Enter Diamond, Star, Square, X, Triangle, Circle as a password at the vault screen.
Army channel FMV sequence
Enter X, Diamond, Star, Triangle, Triangle, Circle as a password at the vault screen.
Level select
Enter Square, Circle, Circle, Triangle, X, X as a password at the vault screen.
Gex quotes
Enter Square, Triangle, X Star, Square, X as a password at the vault screen. Press Select to hear various comments from Gex.
Debug menu
Enter Square, Square, Diamond, Circle, X X as a password at the vault screen. Press Select to enter the debug menu.