Enter the following codes at the 'Cheat Entry' screen to unlock the corresponding effect.

Unlock God Mode:
L1, Square, X, R1, Start.

Unlimited Weapons:
Triangle, Circle, Up, Right, Down.

ALL Pick-Ups are Homing Missiles:
Start, R1, L1, Start, Start.

ALL Pick-Ups are Napalms:
Start, Start, L1 (x3).

ALL Pick-Ups are Power Missiles:
Start, L1, Start, L1, Start.

No Pick-Ups:
Select, Select, R1, L2, Start.

No Full Health Pick-Ups:
L1, Start (x3), R1.

No Health Pickups:
Select, L1, Select, Start, Circle.

Alone in Deathmatch:
X, Circle (x4).

Computer Cars Ignore Health Pick-Ups:
Down, L1, Down, Start, Triangle.

CPU Kills Human Players:
L1, R1, L1, R1, R1.

Level in Deathmatch:
Up (x3), Left, Left Demo

Different View of Flower Power:
Left, Square (x3), Left.

Freeze Missile:
Triangle, Up, O, Right, Start.

Giant Ricochet Bombs:
Left, Right, Left, Right, Up.

Homing Rain Missiles:
Up, Down, Up, Down, Up.

Icy Levels:
Up, Up, X, X, Up.

Infinite Specials:
L1, L1, R1 (x3).

Massive Force:
Triangle, Circle, Down, Left, Up.

Smart Seekers:
Triangle, Left, Down, Right, Up.

Super Napalms:
R1, R1, L1 (x3)

Unlock Memory Card Option:
Start (x5)

Unlock Minion:
Right (x3), Left, Left.

Unlock Sweet Tooth:
Left (x3), Right, Right.

Warehouse Level in Deathmatch:
Square (x3), Left, Left.

Play at Club Kid's House in Deathmatch Mode:
Left (x3), Square, Square.