Invulnerability:
Even Superman could use this trick. Gain invulnerability by pressing Square,
Triangle, Circle, Square, Square, Triangle, Circle, Circle, Square, Triangle,
Square, X. For a real blast, combine it with the Turbo Speed code and you'll be
smokin'!

Mega Weapons:
For mega weapons, find a safe place to hide and press Triangle, Square, Circle,
X, Triangle, Square, X, Triangle, Square, X, Circle, L.

Weird Colors:
In the game press Square, Triangle, Circle, Square, Square, Triangle, Circle,
Circle, Square, Triangle, Square, X, Traingle, X, Square, Triangle.
You can repeat this code many times for different colors.

Shield Recharge:
During gameplay press tri, tri, x, square, tri, circle, tri, x, square, x, tri,
and x. A woman's voice should say "Cheater" and "Shield Recharged"
should show
up on the screen.

Bright Display:
During gameplay press square, tri, circle, square, square, x, cicle, tri,
square, circle, x, and tri. The screen colors turn brighter so you can see
better.

All Keys:
During gameplay press press x circle triangle x triangle triangle x triangle x
triangle x

Turbo Mode:
During gameplay press: square triangle circle square circle x square x circle
triangle square x

Mega Zowie Wowie:
During gameplay press triangle square circle x triangle square x triangle
square x circle square

More Zowie Wowie:
During gameplay press triangle x square square triangle circle circle square
triangle square circle x

All Level Keys:
What's that, you say? Your ship didn't come with a set of lockpicks? Must have
been an oversite. Press Square, X, Circle, Triangle, X, Triangle, Triangle, X,
Triangle, X, Triangle, X to correct this grevious error.

All Weapons, 10 lives and Level Select:
To get a piece of this action, find a safe place to hide and press Triangle, X,
Square, Square, Triangle, Circle, Circle, Square, Triangle, Square, Circle, X.

Brighter Screen:
If the screen is too dark, press Square, Triangle, Circle, Square, Square, X,
Circle, Triangle, Square, Circle, X, Triangle.

Cloaking Device:
For a free cloaking device, press Triangle, Square, X, Circle, Square, X,
Circle, Triangle, X, Square, X, Triangle.