Enter these cheats while playing the game
To have chicks with guns
'Right, L1, Circle, L2, Left, X, R1, L1, L1, X'
All Weapons 1
'R1, R2, L1, R2, Left, Down, Right,
Up, Left, Down Right, Up'.
All Weapons 2
'R1, R2, L1, R2, Left, Down, Right,
Up, Left, Down, Down, Left'.
All Weapons 3
'R1, R2, L1, R2, Left, Down, Right,
Up, Left, Down, Down, Down'.
Full Armor
'R1, R2, L1, X, Left, Down, Right,
Up, Left, Down, Right, Up'.
Full Health
'R1, R2, L1, Circle, Left, Down,
Right, Up, Left, Down, Right, Up'.
Commit Suicide
'Right, L2, Down, R1, Left, Left,
R1, L1, L2, L1'.
Raise Wanted Level
'R1, R2, Circle, R2, Left, Right,
Left, Right, Left, Right'.
Lower Wanted Level
'R1, R1, Circle, R2, Up, Down, Up,
Down, Up, Down'.
Ladies Man
'Circle, X, L1, L1, R2, X, X,
Circle, Triangle'.
Change Clothes
'Right, Right, Left, Up, L1, L2,
Left, Up, Down, Right'.
Play as Ricardo Diaz
'L1, L2, R1, R2, Down, L1, R2, L2'.
Play as Lance Vance
'Circle, L2, Left, X, R1, L1, X,
L1'.
Play as Candy Suxxx
'Circle, R2, Down, R1, Left, Right,
R1, L1, X, L2'.
Play as Ken Rosenberg
'Right, L1, Up, L2, L1, Right, R1,
L1, X, R1'.
Play as Hilary King
'R1, Circle, R2, L1, Right, R1, L1,
X, R2'.
Play as Love Fist Guy 1
'Down, L1, Down, L2, Left, X, R1,
L1, X, X'.
Play as Love Fist Guy 2
'R1, L2, R2, L1, Right, R2, Left,
X, Square, L1'.
Play as Phil Cassady
'Right, R1, Up, R2, L1, Right, R1,
L1, Right, Circle'.
Play as Sonny Forelli
'press Circle, L1, Circle, L2, Left, X,
R1, L1, X, X'.
Play as Mercedes
'R2, L1, Up, L1, Right, R1, Right,
Up, Circle, Triangle'.
Spawn a Rhino
'Circle, Circle, L1, Circle,
Circle, Circle, L1, L2, R1, Triangle, Circle, Triangle'.
Spawn a Bloodring Racer
'Down, R1, Circle, L2, L2, X, R1,
L1, Left, Left'.
Spawn a Bloodring Banger
'Up, Right, Right, L1, Right, Up,
Square, L2'.
Spawn a Hotring Racer 1
'R1, Circle, R2, Right, L1, L2, X,
X, Square, R1'.
Spawn a Hotring Racer 2
'R2, L1, Circle, Right, L1, R1,
Right, Up, Circle, R2'.
Spawn a Romero's Hearse
'Down, R2, Down, R1, L2, Left, R1,
L1, Left, Right'.
Spawn a Love Fist
'R2, Up, L2, Left, Left, R1, L1,
Circle, Right'.
Spawn a Trashmaster
'Circle, R1, Circle, R1, Left,
Left, R1, L1, Circle, Right'.
Spawn a Saber Turbo
'Right, L2, Down, L2, L2, X, R1,
L1, Circle, Left'.
Spawn a Caddie
'Circle, L1, Up, R1, L2, X, R1, L1,
Circle, X'.
Blow Up Cars
'R2, L2, R1, L1, L2, R2, Square,
Triangle, Circle, Triangle, L2, L1'.
Aggressive Drivers
'R2, Circle, R1, L2, Left, R1, L1,
R2, L2'.
Pink Cars
'Circle, L1, Down, L2, Left, X, R1,
L1, Right, X'.
Black Cars
'Circle, L2, Up, R1, Left, X, R1,
L1, Left, Circle'.
Dodo Cheat
'Right, R2, Circle, R1, L2, Down,
L1, R1'.
Perfect Handling
'Triangle, R1, R1, Left, R1, L1,
R2, L1'.
Sunny Weather
'R2, X, L1, L1, L2, L2, L2, Down'.
Cloudy Weather
'R2, X, L1, L1, L2, L2, L2,
Triangle'.
Very Cloudy Weather
'R2, X, L1, L1, L2, L2, L2, Square'.
Stormy Weather
'R2, X, L1, L1, L2, L2, L2, Circle'.
Foggy Weather
'R2, X, L1, L1, L2, L2, L2, X'.
Speed Up Time
'Circle, Circle, L1, Square, L1,
Square, Square, Square, L1, Triangle, Circle, Triangle'.
Slow Down Time
'Triangle, Up, Right, Down, Square,
R2, R1'.
Peds Riot
'Down, Left, Up, Left, X, R2, R1,
L2, L1'.
Note: You won't be able to turn this off.
Peds Hate You
'Down, Up, Up, Up, X, R2, R1, L2,
L2'.
Note: You won't be able to turn this off.
From BillyJoeBob

Need For Speed: Hot Pursuit 2
BMW Z8
On the main menu, press 'Square, Right, Square, Right,
R2, Triangle, R2, Triangle' to unlock the BMW Z8.
HSV Coupe GTS
At the main menu screen, press 'L1, L2, L1, L2, R1,
Triangle, R1, Triangle' to unlock the HSV Coupe GTS.
Lamborgini Diablo 6.0 VT
Press 'r, R2, r, R2, R1, L1, R1, L1' at the main menu.
McLaren F1 LM
On the main menu, enter Square, 'L1, Square, L1,
Triangle, Right, Triangle, Right'.
Unlock Ferrari F550
At the Main Menu, press 'L1, Square, L1, Square, Right,
R1, Right, R1'.
Unlock Ferrari F50
At the Main Menu, press 'L1, Triangle, L1, Triangle,
Right, L2, Right, L2'.
Unlock Ferrari 360 Spider
At the Main Menu, press 'R2, Square, R2, Square, Triangle,
L2, Triangle, L2'.
Unlock Mercedes CLK GTR
At the Main Menu, press 'R2, R1, R2, R1, Left, Triangle,
Left, Triangle'.
Unlock Aston Martin V12 Vanquish
At the Main Menu, press 'R2, Right, R2, Right, Triangle,
Left, Triangle, Left'.
From anonymous source

Pro Evolution Soccer 2
Unlock the Classic European Teams:
To unlock the Classic Dutch team
win the European Cup with Holland
To unlock the Classic English team
win the European Cup with England
To unlock the Classic French team
win the European Cup with France
To unlock the Classic German team
win the European Cup with Germany
To unlock the Classic Italian team
win the European Cup with Italy
Unlock European All-stars
Win the International Cup on any settings
Unlock World All-stars
Win the International League on any settings
Unlock different All-stars teams
Win the European Cup on any settings using England,
Germany, France, Holland or Italy to unlock the all-
stars team for the team you used.
Unlock Brazil and Argentina All-stars
Win American Cup using Brazil and Argentina
Unlock call names for club teams
Win the Konami Cup on any settings using a club team
From Psychosis Gaming Bible

The Lord of the Rings: The Two Towers !!NEW!!
Restore Missiles
Pause the game, hold R1, R2, L1, L2, and enter x, down,
triangle, up.
Purchase all level 8 attacks
Push and hold L1, L2, R1, and R2. Then press X, X, Down,
then Down.
Beat the game and it gives you these codes:
Start a Mission, Pause, and hold in L1, L2, R1, and R2
while pressing the following buttons:
Always Devastating: square, square, circle, circle
Small Enemies: triangle, triangle, X, X
All Upgrades: triangle, circle, triangle, circle
Invulnerable: triangle, square, X, circle
Slo-Mo: triangle, circle, X, square
Infinite Missiles: square, circle, X, triangle
From anonymous source