Finding it quite hard, so was looking for cheats for the full weapons etc.
I can't link to games sites from here, so any decent cheats would be appreciated.
Cheat Effect
UP, SQUARE, SQUARE, DOWN, LEFT, SQUARE, SQUARE, RIGHT Weapon set 1
UP, CIRCLE, CIRCLE, DOWN, LEFT, CIRCLE, CIRCLE, RIGHT Weapon set 2
UP, X, X, DOWN, LEFT, X, X, RIGHT Weapon set 3
L1, R1, TRIANGLE, L1, R1, CIRCLE, L1, R1 Money Cheat ($250,000)
L1, R1, CIRCLE, L1, R1, X, L1, R1 Full Armor (Blue Bar)
L1, R1, X, L1, R1, SQUARE, L1, R1 Full Health (Red Bar)
L1, R1, SQUARE, L1, R1, TRIANGLE, L1, R1 Raise Wanted Level
L1, L1, TRIANGLE, R1, R1, X, SQUARE, CIRCLE Never Wanted
CIRCLE, X, DOWN, CIRCLE, X, UP, L1, L1 Cars Drive On Water
X, X, R1, CIRCLE, CIRCLE, L1, TRIANGLE, TRIANGLE White Cars
CIRCLE, CIRCLE, R1, TRIANGLE, TRIANGLE, L1, SQUARE, SQUARE Black Cars
L1, UP, RIGHT, R1, TRIANGLE, SQUARE, DOWN, X Raise Media Attention
TRIANGLE, CIRCLE, DOWN, TRIANGLE, CIRCLE, UP, L1, L1 Spawn Trashmaster
L1, L1, LEFT, L1, L1, RIGHT, SQUARE, TRIANGLE Random Ped Outfit
L1, L1, CIRCLE, R1, R1, SQUARE, TRIANGLE, X Sunny Weather
UP, DOWN, CIRCLE, UP, DOWN, SQUARE, L1, R1 Clear Weather
UP, DOWN, X, UP, DOWN, TRIANGLE, L1, R1 Overcast Weather
UP, DOWN, SQUARE, UP, DOWN, CIRCLE, L1, R1 Rainy Weather
UP, DOWN, TRIANGLE, UP, DOWN, X, L1, R1 Foggy Weather
L1, L1, LEFT, L1, L1, RIGHT, TRIANGLE, CIRCLE Spawn Rhino
L1, L1, LEFT, L1, L1, RIGHT, CIRCLE, X Faster Clock
L1, L1, LEFT, L1, L1, RIGHT, X, SQUARE Destroy All Cars
L1, L1, R1, L1, L1, R1, LEFT, SQUARE Peds Riot
L1, L1, R1, L1, L1, R1, UP, TRIANGLE Peds Attack You
R1, R1, L1, R1, R1, L1, RIGHT, CIRCLE Peds Have Weapons
R1, R1, L1, R1, R1, L1, DOWN, X Faster Gameplay
R1, TRIANGLE, X, R1, SQUARE, CIRCLE, LEFT, RIGHT Slower Gameplay
L1, UP, LEFT, R1, TRIANGLE, CIRCLE, DOWN, X Perfect Traction
L1, DOWN, LEFT, R1, X, CIRCLE, UP, TRIANGLE Commit Suicide
TRIANGLE, TRIANGLE, R1, SQUARE, SQUARE, L1, X, X All Green Lights
SQUARE, SQUARE, R1, X, X, L1, CIRCLE, CIRCLE Aggressive Drivers
DOWN, DOWN, DOWN, TRIANGLE, TRIANGLE, CIRCLE, L1, R1 Have People Follow You
DOWN, DOWN, DOWN, CIRCLE, CIRCLE, X, L1, R1 Bobble Head World
L1, R1, L1, R1, UP, DOWN, L1, R1 Display Game Credits
DOWN, DOWN, DOWN, X, X, SQUARE, R1, L1 Upside Down Gameplay
CIRCLE, RIGHT, X, UP, RIGHT, X, L1, SQUARE Change Bike Tire Size
TRIANGLE, R1, L1, DOWN, DOWN, R1, R1, TRIANGLE All Vehicles Chrome Plated
Triangle, Triangle, Triangle, Up, Up, Right, L, R Upside Up
UP, UP, UP, TRIANGLE, TRIANGLE, CIRCLE, L1, R1 Unlock multiplayer skins
UP, UP, UP, CIRCLE, CIRCLE, X, L1, R1 4 Gangs+28 Characters (Multiplayer)
UP, UP, UP, X, X, SQUARE, R1, L1 7 Gangs+43 Characters (Multiplayrer)
UP, UP, UP, SQUARE, SQUARE, TRIANGLE, R1, L1 2 Gangs+14 Characters (Multiplayer)
X, X, X, DOWN, DOWN, RIGHT, L1, R1 Upside Down Gameplay2
X, Square, Down, X, Square, Up, R1, R1 Calls closest Ped to come hop on/in your vehicle.
Sorry about the character spacing.
on most GTA games, by the way, if you cheat then it takes away another element of the game so you can't ever complete it 100%. just practise!
Pardon my stupidity, but are the left/right/up/down refering to the analogue stick? or the 4 buttons above that. Cheers
Left, right, up and down are the buttons above the analogue stick. L1 and R1 are the buttons on the very top of the PSP.