All codes are entered during normal gameplay. Some of these codes cannot be disabled, and may screw up your savegames. Consider yourself warned.
Weapons (tier 1):
Press Up, Square, Square, Down, Left, Square, Square, Right.
Weapons (tier 2):
Press Up, Circle, Circle, Down, Left, Circle, Circle, Right.
Weapons (tier 3):
Press Up, X, X, Down, Left, X, X, Right.
Full health:
Press L1, R1, X, L1, R1, Square, L1, R1.
Body armor:
Press L1, R1, Circle, L1, R1, X, L1, R1.
$250,000:
Press L1, R1, Triangle, L1, R1, Circle, L1, R1.
Wanted level increase:
Press L1, R1, Square, L1, R1, Triangle, L1, R1.
Wanted level disabled:
Press L1, L1, Triangle, R1, R1, X, Square, Circle.
Better handling vehicles:
Press L1, Up, Left, R1, Triangle, Circle, Down, X.
Change motorcycle tire size:
Press Circle, Right, X, Up, Right, X, L1, Square. There are 3 sizes.
Destroy all cars:
Press L1, L1, Left, L1, L1, Right, X, Square.
Drive on water:
Press Circle, X, Down, Circle, X, Up, L1, L1.
Black traffic:
Press Circle, Circle, R1, Triangle, Triangle, L1, Square, Square.
Chrome traffic:
Press Triangle, R1, L1, Down, Down, R1, R1, Triangle.
White traffic:
Press X, X, R1, Circle, Circle, L1, Triangle, Triangle.
Traffic lights always green:
Press Triangle, Triangle, R1, Square, Square, L1, X, X.
Aggressive drivers:
Press Square, Square, R1, X, X, L1, Circle, Circle.
Pedestrians have weapons:
Press R1, R1, L1, R1, R1, L1, Right, Circle.
Random pedestrian costumes:
Press L1, L1, Left, L1, L1, Right, Square, Triangle.
Clear weather:
Press Up, Down, Circle, Up, Down, Square, L1, R1.
Sunny weather:
Press L1, L1, Circle, R1, R1, Square, Triangle, X.
Foggy weather:
Press Up, Down, Triangle, Up, Down, X, L1, R1.
Overcast weather:
Press Up, Down, X, Up, Down, Triangle, L1, R1.
Rainy weather:
Press Up, Down, Square, Up, Down, Circle, L1, R1.
Faster game time:
Press L1, L1, Left, L1, L1, Right, Circle, X.
Faster game play:
Press R1, R1, L1, R1, R1, L1, Down, X.
Slower game play:
Press R1, Triangle, X, R1, Square, Circle, Left, Right.
Pedestrians attack you:
Press L1, L1, R1, L1, L1, R1, Up, Triangle.
Pedestrians riot:
Press L1, L1, R1, L1, L1, R1, Left, Square.
Pedestrians follow you:
Press Down, Down, Down, Triangle, Triangle, Circle, L1, R1.
Big head mode:
Press Down, Down, Down, Circle, Circle, X, L1, R1.
Spawn Rhino:
Press L1, L1, Left, L1, L1, Right, Triangle, Circle.
Spawn Trashmaster:
Press Triangle, Circle, Down, Triangle, Circle, Up, L1, L1.
Commit suicide:
Press L1, Down, Left, R1, X, Circle, Up, Triangle.
View media attention level:
Press L1, Up, Right, R1, Triangle, Square, Down, X. Then break some laws.
Upside down:
Press Down, Down, Down, X, X, Square, R1, L1.
Upside down (alternate):
Press X, X, X, Down, Down, Right, L1, R1.
Return to normal from upside down:
Press Triangle, Triangle, Triangle, Up, Up, Right, L1, R1.
Return to normal from upside down (alternate):
Press Up, Up, Up, Triangle, Triangle, Square, R1, L1.
View game credits:
Press L1, R1, L1, R1, Up, Down, L1, R1.
Nearest Pedestrian Rides With You:
Press X, Square, Down, X, Square, Up, R1, R1.
Cars Drive On Water:
Press Circle, X, Down, Circle, X, Up, L1, L1.
Random Pedestrian Outfit:
Press L1, L1, Left, L1, L1, Right, Square, Triangle.
Never Wanted:
Press L1, L1, Triangle, R1, R1, X, Square, Circle.
Bobble Head World:
Press Down, Down, Down, Circle, Circle, X, L1, R1