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Cheat Codes
Enter these codes during gameplay without pausing: Code Effect
Triangle, L1, Triangle, R2, Square, L1, L1 All Vehicles Invisible (except motorcycles)
R1, R2, L1, R2, L, D, R, U, L, D, R, U All Weapons #1
R1, R2, L1, R2, L, D, R, U, L, D, D, L All Weapons #2
R1, R2, L1, R2, L, D, R, U, L, D, D, D All Weapons #3
R1, R2, L1, X, Left, Down, Right, Up, Left, Down, Right, Up Armor Code
O, L2, U, R1, L, X, R1, L1, L, O Black Cars
R2, L2, R1, L1, L2, R2, S, T, O, T, L2, L1 Blow Up Cars
R1, R2, L1, L1, L, D, R, U, L, D, R, U Car Speed x2
R, R, L, U, L1, L2, L, U, D, R Change Clothes
Right,L1,Circle,L2,Left,X,R1,L1,L1,X Chicks with Guns
R2, X, L1, L1, L2, L2, L2, T Cloudy Weather
R, L2, D, R1, L, L, R1, L1, L2, L1 Commit Suicide
Circle,X,L1,L1,R2,X,X,Circle,Triangle Fanny Magnet (Girls follow Tommy)
Triangle, Up, Right, Down, L2, L1, Square Fast Motion
Right, R2, O, R1, L2, Down, L1, R1 Flying Cars
R2, X, L1, L1, L2, L2, L2, X Foggy Weather
R, L1, O, L2, L, X, R1, L1, L1, X Gals Drop Weapons
R1, R2, L1, O, Left, Down, Right, Up, Left, Down, Right, Up Health Code
R2, Circle, Up, L1, Right, R1, Right, Up, Square, Triangle Hovering Boats
Right, R2, Circle, R1, L2, Square, R1, R2 Hovering Cars
R1, R1, O, R2, U, D, U, D, U, D Lower Wanted Level
R2,Circle,R1,L2,Left,R1,L1,R2,L2 Mad Cars
R2, O, U, L1, R, R1, R, U, S, T Media Level Meter
D, U, U, U, X, R2, R1, L2, L2 Pedestrian Attack (cannot be turned off)
D, L, U, L, X, R2, R1, L2, L1 Pedestrian Riot (cannot be turned off)
R2, R1, X, T, X, T, U, D Pedestrians have weapons
T, R1, R1, L, R1, L1, R2, L1 Perfect Handling
Circle,L1,Down,L2,Left,X,R1,L1,Right,Circle Pink Cars
O, R2, D, R1, L, R, R1, L1, X, L2 Play As Candy Suxxx
R1, O, R2, L1, R, R1, L1, X, R2 Play As Hilary King
R, L1, U, L2, L1, R, R1, L1, X, R1 Play As Ken Rosenberg
O, L2, L, X, R1, L1, X, L1 Play As Lance Vance
D, L1, D, L2, L, X, R1, L1, X, X Play As Love Fist Guy #1
R1, L2, R2, L1, R, R2, L, X, S, L1 Play As Love Fist Guy #2
R2, L1, U, L1, R, R1, R, U, O, T Play As Mercedes
R, R1, U, R2, L1, R, R1, L1 ,R, O Play As Phil Cassady
L1, L2, R1, R2, D, L1, R2, L2 Play As Ricardo Diaz
O, L1, O, L2, L, X, R1, L1, X, X Play As Sonny Forelli
R1, R1, O, R2, L, R, L, R, L, R Raise Wanted Level
O, L1, D, L2, L, X, R1, L1, R, X Robocops
T, U, R, D, S, R2, R1 Slow Down Time
Triangle, Up, Right, Down, Square, R2, R1 Slow Motion
U, R, R, L1, R, U, S, L2 Spawn A Bloodring Banger
D, R1, O, L2, L2, X, R1, L1, L, L Spawn A Bloodring Racer
O, L1, U, R1, L2, X, R1, L1, O, X Spawn A Caddie
R1, O, R2, R, L1, L2, X, X, S, R1 Spawn A Hotring Racer #1
R2, L1, O, R, L1, R1, R, U, O, R2 Spawn A Hotring Racer #2
R2,Up,L2,Left,Left,R1,L1,Circle,Right Spawn A Love Fist Limo
O, O, L1, O, O, O, L1, L2, R1, T, O, T Spawn A Rhino
D, R2, D, R1, L2, L, R1, L1, L, R Spawn A Romero's Hearse
R, L2, D, L2, L2, X, R1, L1, O, L Spawn A Sabre Turbo
O, R1, O, R1, L, L, R1, L1, O, R Spawn A Trashmaster
R2, L1, O, Right, L1, R1, Right, Up, O, R1 Spawns a Hotring Racer.
R2, L1, circle, right, L1, R1, right, up, circle, R2 Spawns the Hot Ring Racer
O, O, L1, S, L1, S, S, S, L1, T, O, T Speed Up Time
R2, X, L1, L1, L2, L2, L2, O Stormy Weather
R2,X,L1,L1,L2,L2,L2,Triangle Sunny Weather
R2, X, L1, L1, L2, L2, L2, S Very Cloudy Weather
R1, X, Triangle, Right, R2, Square, Up, Down, Square Weird Wheels
Fuente: http://www.gamefaqs.com/console/ps2/code/33074.html