Hold L1 + R1 + R2 and press Select to enable cheat mode. The message "Cheats Enabled" will appear at the top of the screen to confirm correct code entry. The following codes may now be enabled.
Hold L1 + R1 + R2 and press Up, Down, Left, Right.
Hold L1 + R1 and press Up, Down, Left, Right.
Hold L1 + R1 and press Up, Down, Up, R2.
Hold L1 + R1 + R2 + X and press Down.
Hornet Nest Stingers
Select stingers, then hold L1 + L2 + R1 + Triangle + Left.
Fire And Brimstone
Select Meteors, then press Triangle + L1 + L2 + R1 + Right.
Enter one of the following codes during game play to activate the corresponding special move.
Shield Hold Triangle and press Up, Right, Down, Left
Stun Hold Triangle and press Right, Left, Up
Cash suck Hold Triangle and press Left, Right, Up
Rear fire Hold Triangle and press Right, Left, Down
Mine Hold Triangle and press Left, Right, Down
Up on 2 wheels to the left Hold Triangle and press Up, Down, Left
Up on 2 wheels to the right Hold Triangle and press Up, Down, Right
Jump Press L1 + R1
Enter R1, Square, X, Square, L2, Circle as a password.
Play as Goliath:
Enter Triangle, L1, R1, X, L2, L2 as a password.
Play as Nightshade:
Enter R1, R2, L1, L1, X, Circle as a password.
Play as Helicopter:
Enter L1, Triangle, R2, Triangle, Triangle, R1 as a password.
Play as Big Daddy:
Enter Triangle, Square, R2, X, Triangle, R2 as a password. Choose challenge mode and select the "Nuke York" level. Big Daddy will appear on the vehicle selection screen. Note: When this code is enabled, prowlers can not be used and the game will not advance to the next level.
Play as Big Daddy 2:
Enter Triangel, Square, R2, X, Triangel, R2 as password.
Only on Challenge, Nuke York.
Enter L1, L2, Circle, L1, R1, Square as a password.
Enter R1, Triangle, R1, Triangle, L1, Square as a password.
Enter Square, X, Circle, Triangle, R1, R2 as a password. Note: The special bar will still decrease, but turbos will still be available after it runs out.
Enter Circle, Square, R2, X, Triangle, R2 as a password.
Enter X, Circle, L2, X, Square, L1 as a password to enable the Funtopia level under challenge mode.
Enter X, Square, Circle, L1, L2, Square as a password to enable the Gulch level under challenge mode. Alternately, enter Square, Square, Triangle, R1, L1, Circle as a password.
Boss Battle 1:
Enter Circle, R2, R1, Square, L1, R2 as a password. Note: Re-enter this password after every challenge battle. The first opponent will be a normal, random, character. Your opponent will transform into Goliath after the battle.
Boss Battle 2:
Enter Circle, Circle, L2, L1, Triangle, Triangle as a password.
Boss Battle with Big Daddy:
Enter Square, Triangle, Circle, Circle, R2, R2 as a password.
Duke Nukem: Time To Kill FMV sequence:
Enter Square, Square, Circle, Circle, Triangle, Triangle as a password.
Change camera angle:
Hold Select + R1 and press Down during game play in single player mode for an helicopter chase view and overhead angle.
Change split screen:
Hold Select + R1 and press Down during game play in multi-player mode.
Full screen mode:
Hold Select + R1 and press Up during game play
Mea Hornet's Nest Stingers:
Select the Stingers during game play, then hold R2 and rapidly press L2. If done correctly, the stingers will shoot rapidly.
Lost in space:
Place an RLB as close as possible to the downed Alien Ship in the Area 51 level. Then go to the moon and detonate the bomb. The planet should explode. If you survive the resulting meteor shower, you will be marooned in space. Note: The game cannot continue from this point, and the "Quit" option must be used.
Fast Alien saucer:
Enable the "Alien Saucer" code . Go to any level and select the Alien Saucer. Rapidly press Square when the level finishes loading The Alien Saucer should speed up quickly, reaching over 300 mph. This can also allow you to exit the perimeter of the level. Note: The faster Square is pressed the faster the Alien Saucer will travel.
Automatic God mode:
Use the "Lost in space" trick to blow up the Earth. Quit the game when prompted then start a new game, preferably from an existing save. God mode will automatically be activated.