This code will make it night-time in your game, You'll have to rely on your Night Vision rifle scope to see the bad guys. While you select the Game Mode (training or arcade modes), press and hold the trigger button. While you are holding the trigger, move your cursor onto the mode of your choice and press the Start Button 5 times. If you entered the code correctly you'll hear a second gunshot.

This code will remove the guide arrows and the aiming rings from your screen making it a much harder game. While you select the Game Mode (training or arcade modes), press and hold the trigger button. While you are holding the trigger, move your cursor onto the mode of your choice and press the Start Button 4 times. If you entered the code correctly you'll hear a second gunshot.

At the mode select screen enter:

LEFT, RIGHT, RIGHT, SQUARE, TRIANGLE

Your scope will look like a heart and the screen will have a pinkish tint to it.

At the mode select screen enter:

RIGHT, RIGHT, RIGHT, SQUARE

Your scope will not have the crosshairs.

At the mode select screen enter:

DOWN, TRIANGLE, UP, SQUARE, TRIANGLE, DOWN, RIGHT, DOWN, RIGHT, SQUARE, TRIANGLE

Your game will be extremely fast.

At the mode select screen enter:

RIGHT, DOWN, RIGHT, SQUARE, RIGHT, DOWN, RIGHT, SQUARE.

You will have no scope, you'll have to play the game with only the red circle. You will not be able to zoom in at all. Good Luck!

At the mode select screen enter:

RIGHT, DOWN, RIGHT, SQUARE, UP, SQUARE, SQUARE, TRIANGLE, DOWN, RIGHT, DOWN, RIGHT, SQUARE, TRIANGLE

At the mode select screen enter:

UP, LEFT, DOWN, RIGHT, UP, SQUARE, TRIANGLE

Your game will take place at night.

At the mode select screen enter:

RIGHT, RIGHT, RIGHT, RIGHT, LEFT, DOWN, UP, RIGHT

Your little red arrows will disappear.

During the game you can press the START button and then enter:

TRIANGLE, X, RIGHT, LEFT, RIGHT, LEFT, CIRCLE, X, RIGHT, LEFT, RIGHT, LEFT, DOWN, DOWN, UP, UP

This will 5 seconds of your time for and extra life.

During the game you can hit the START button and pause the game. Then enter:

UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, X, CIRCLE

This code will trade half of your life for an extra 5 seconds of gameplay.

At the mode select screen enter:

LEFT, LEFT, RIGHT, SQUARE, DOWN, DOWN, UP, TRIANGLE, UP, RIGHT, DOWN, UP, LEFT, DOWN, SQUARE

Your levels will be the same but flip-flopped as a mirror image.