Level select 
Pause the game, enter the "Inventory" menu, and press 
Square(2), Circle, Square, Left, Right, Left, Right, 
Circle, Up, Right, Down. 

Then, go to the balloonist to select any level 
in the game.

Ninety-nine lives 
Pause the game, enter the "Inventory" menu, and press 
Square(6), Circle, Up, Circle, Left, Circle, Right, 
Circle.

Crash Bandicoot: Warped demo 
When "Press Start" appears at the opening screen, 
press L1 + Triangle.

Bonus level 
Collect all the gems in every level to access a 
bonus level.

Faster running 
While playing a game, hold Run + Jump.

Avoid dying 
Pause the game and exit the current level if faced with 
imminent death by falling. Note: This may not be done in 
the home levels.