All Weapons:
Pause the game and press X, Triangle, R2, Triangle, X, L2, R2, Down, L2, Square,
Right. A beep will confirm correct code entry.
*Note: This code may only be enabled three times during the entire game.

Arctic Card:
Pause the game and press Up, Right, Triangle, Circle, Down, Left, X, Square.
A beep will confirm correct code entry.
*Note: This code may only be enabled once per level.

Full Health:
While playing, pause the game and press L2, L2, R2, R2, Up, L1, Up, R1. A beep
will confirm the code.
* Note: This code may only be enabled five times during the entire game.

Level Select:
Enter the following codes at the title screen.
Los Angeles:
Circle, Circle, R2, R2, Left, Right, Up, L2, L2, Triangle

Los Angeles 7:
Circle, Circle, L2, L2, Left, Right, Up, R2, R2, Triangle

Las Vegas:
Square, Square, L2, L1, Up, Down, R1, R2, Left, Right

Las Vegas 7:
Triangle, Triangle, L2, L1, Up, Down, R1, R2, Right, Left

San Francisco:
Circle, Square, L2, R1, Triangle, L1, R2, Down, Up, Left

Houston:
L2, L1, R1, R2, Circle, Left, Left, Triangle, Right, Right

Washington:
Circle, Circle, L1, R1, L2, R2, Left, Right, Triangle, Square

Florida:
L1, R1, Square, Circle, R2, L2, Up, Triangle, Down, Down

Nebraska:
Square, Square, Left, Left, Square, Circle, Circle, Up, Up, Square

Moon Base:
R1, R1, L2, R1, Square, Triangle, Triangle, Left, Right, R2.

M-16 Ammo:
Pause the game and press Down, Square, Square, Square, Circle, Circle, Up, Right.
A beep will confirm correct code entry. The M-16 will now have 999 rounds of
ammunition.

Net Node Card:
Pause the game and press Left, Triangle. L2, Right, R1, Circle, R1, Down. A
beep will confirm correct code entry.
* Note: This code may only be enabled three times during the entire game.

Rocket Ammo:
Pause the game and press Left, Left, L1, R2, Square, R1, Right, Right. A beep
will confirm correct code entry.
* Note: This code may only be enabled five times during the entire game.

Shield:
Pause the game and press Triangle, X, Triangle, X, Triangle, X Square, Circle,
Square, Circle, Up, R1. A beep will confirm correct code entry.
* Note: This code may only be enabled three times during the entire game.

Teleport Credit:
Pause the game and press L1, R1(2), L2, R2, L2, Circle, Triangle. A beep will
confirm correct code entry.
* Note: This code may only be enabled 100 times per level.

View Credits:
Press Square, Square, Square, Square, Circle, Circle, Circle, Square, Square
at the main menu.

View FMV’s:
Press L2, L2, R2, R2, L1, R1, Square, Circle, Up, Down at the main menu.

GameShark Codes

Infinite Health 8009A07C 03E8
 
Infinite Money  8003A0C0 270F
 
Infinite Weapon 80124576 03E7
 

Thanks to Revolution reader Jason Sommerfeld!