Play as Alien saucer
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.

Funtopia level
Enter X, Circle, L2, X, Square, L1 as a password to unlock the Funtopia level under challenge mode.

Gulch level
Enter X, Square, Circle, L1, L2, Square as a password to unlock 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.

Double pick-ups
Enter L1, L2, Circle, L1, R1, Square as a password.

Increased armor
Enter R1, Triangle, R1, Triangle, L1, Square as a password.

Infinite turbos
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.

Infinite jump
Enter Circle, Square, R2, X, Triangle, R2 as a password.

View Duke Nukem: Time To Kill FMV sequence
Enter Square, Square, Circle, Circle, Triangle, Triangle as a password.

Hornet nest stingers
Select stingers, then hold L1 + L2 + R1 + Triangle + Left.

Combo moves

Move	Code
Jump	Press L1 + R1
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