Debug mode

Pause the game, then hold R2 and Up, Circle, Right, Up, Left, Right, Down. If you entered the code correctly, you will hear a sound. Then, resume the game and press Select to display a list of options including level select, sound debug, collectibles, and more. For the European/Australian PAL version, pause the game, then hold L2 and press Up, Circle, Right, Up, Left, Right, Down.

Invincibility

Pause the game, then hold L2 and press Down, Up, Left(2), Triangle, Right, Down. If you entered the code correctly, you will hear a sound.

Gex quotes

Pause the game, then hold L2 and press Down, Right, Left, Circle, Up, Right. If you entered the code correctly, you will hear a sound. Then, resume the game and press Select to force Gex to make a comment.

GEXVault codes

Collect all four vault secret keys in the hidden levels to open the GEXVault in the GEXCave. Then, enter one of the following codes in the GEXVault to activate the corresponding cheat function:

Debug mode

Enter Square, Square, Diamond, Circle, X, X as a code. Then, press Select to enter a debug menu.

Level select

Enter Square, Circle, Circle, Triangle, X, X as a code.

Invincibility

Enter Sqaure, Star, Triangle, Square, Triangle, Diamond as a code.

Extra life

Enter Triangle, Circle, Star, Square, Square, X as a code.

Ten lives

Enter Square, X, Circle, Circle, Triangle, Square as a code.

Eight Hit Paws

Enter Square, Diamond, Triangle, Triangle, Star, Diamond as a code.

Gex quotes

Enter Square, Triangle, X Star, Square, X as a code. Then, press Select to force Gex to make a comment.

Toggle timer

Enter Square, Square, Diamond, Circle, X, X as a code. The timer may be turned on or off at the "Extras" screen.

Play as Alfred

Enter Square, X, Triangle, Square, Star, Star as a code. Note: This is no longer effective after you leave the GEXCave.

Play as Cuz

Enter Square, Diamond, Square, Square, Triangle, Diamond as a code. Note: This is no longer effective after you leave the GEXCave.

Play as Rex

Enter Square, Star, Star, Square, Triangle, Triangle as a code. Note: This is no longer effective after you leave the GEXCave.

Play as DracuGex

Enter Star, X, X, Circle, Square, Triangle as a code. Note: This is no longer effective after you leave the GEXCave.

View FMV sequence

Enter Circle, Triangle, Square, Star, Diamond, Star as a code.

View FMV sequence 2

Enter Diamond, Star, Square, X, Triangle, Circle as a code.

View FMV sequence 3

Enter X, Diamond, Star, Triangle, Triangle, Circle as a code.