Grand Theft Auto 3

Tank (Rhino):
Press Circle(6), R1, L2, L1, Triangle, Circle, Triangle during game play. A message will confirm correct code entry. The tank will appear in front of you. This may be repeated as many times as needed.
SionYoung via Grub Fisher, Justin, Adam Santilllana, James Henderson, and others.

Flying car (low gravity):
Press Right, R2, Circle, R1, L2, Down, L1, R1 during game play. A message will confirm correct code entry. Accelerate and press Up to take off.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.

No wanted level:
Press R2(2), L1, R2, Up, Down, Up, Down, Up, Down during game play. A message will confirm correct code entry. Note: Saving the game will make the effects of this code permanent.
Adam Santilllana, Woody Woody, Carl Buckley, and others.

Higher wanted level:
Press R2(2), L1, R2, Left, Right, Left, Right, Left during game play. A message will confirm correct code entry. Note: Saving the game will make the effects of this code permanent.
Adam Santilllana, Carl Buckley, and others.

All weapons:
Press R2(2), L1, R2, Left, Down, Right, Up, Left, Down, Right, Up during game play. A message will confirm correct code entry. Repeat this code for more ammunition.
Adam Santilllana, John Wooley, Carl Buckley, and others.

To get unlimited ammunition, enable the "All weapons" code continuously until whatever you want is at 9999 shots. The next time your clip runs out, it will reload automatically but the magazine (9999) will stay the same. Note: If you are busted your weapons will disappear and this code will have to be repeated.
Michel Soucy, evan, and XXANGELSPIRITXX.

Full health:
Press R2(2), L1, R1, Left, Down, Right, Up, Left, Down, Right, Up during game play. A message will confirm correct code entry. Note: If this code is enabled during a mission where there is damage on your car, the meter will be reset to zero.
Adam Santilllana, John Wooley, Carl Buckley, Peasandbeans26, and others.

If your vehicle is on fire, enable the "Full health" code to extinguish it.
Rene Arrezola, DanFB26, and Jonny Choudhry.

This code also repairs your car. You cannot see the repairs, but it will act like a new car. If on a mission where you need to have a mint condition car, sometimes enabling the "Full health" code will fulfill the mint condition requirements.
Peasandbeans26 and Rshane100.

Full armor:
Press R2(2), L1, L2, Left, Down, Right, Up, Left, Down, Right, Up during game play. A message will confirm correct code entry.
Adam Santilllana, John Wooley, Carl Buckley, and others.

More money:
Press R2(2), L1, L1, Left, Down, Right, Up, Left, Down, Right, Up during game play. A message will confirm correct code entry.
Adam Santilllana, Carl Buckley, and others.

Note: After you can go to Shoreside Vale, check your criminal rating. It should read "Boss". Enable the "More money" code and check it again. It should have increased by 50 points. Repeat this as many times as desired.
Nh4295.

Destroy all cars:
Press L2, R2, L1, R1, L2, R2, Triangle, Square, Circle, Triangle, L2, L1. A message will confirm correct code entry.
XMuNkY13 and jamesr.

Better driving skills:
Press R1, L1, R2, L1, Left, R1(2), Triangle during game play. A message will confirm correct code entry. Press L3 or R3 to jump while driving. Note: Saving the game will make it so your car will never tip. Also every car will have hydraulics which will enable it jump 15 feet in the air over other cars.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, DJ HAzE, kodekiller, and others.

After this code is enabled, any time you roll your car, press Square + X to flip back over. This will work as long as your car is not on its roof.
hocvitgfAddam Brewer.

Increased gore:
Press Square, L1, Circle, Down, L1, R1, Triangle, Right, L1, X during game play. No confirmation message will appear. You can shoot off pedestrians' arms, legs, and heads with some weapons (sniper rifle, assault rifle, explosives) with an increase in the overall amount of bloodleft behind. Note: Saving the game will make the effects of this code permanent.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, WS, Brandon Girvan and others.

Fog:
Press L1, L2, R1, R2(2), R1, L2, X during game play. A message will confirm correct code entry.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.

Overcast skies:
Press L1, L2, R1, R2(2), R1, L2, Square during game play. A message will confirm correct code entry.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.

Rain:
Press L1, L2, R1, R2(2), R1, L2, Circle during game play. A message will confirm correct code entry.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.

Normal weather:
Press L1, L2, R1, R2(2), R1, L2, Triangle during game play. A message will confirm correct code entry.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.

Invisible cars:
Press L1(2), Square, R2, Triangle, L1, Triangle during game play. A message will confirm correct code entry. Only your vehicle's wheels will be visible.
hocvitgfANDREW BRIGIDA, Thomas Mulders, Petri, and JohnnyKnoxville via Grub Fisher.

Faster game play:
Press Triangle, Up, Right, Down, Square, L1, L2 during game play. A message will confirm correct code entry. Repeat this code to increase its effect.
ANDREW BRIGIDA, Petri, JohnnyKnoxville via Grub Fisher, and Thomas Mulders, and others.

Slower game play:
Press Triangle, Up, Right, Down, Square, R1, R2 during game play. A message will confirm correct code entry. Note: This also continues the effect of an adrenaline pill.
ANDREW BRIGIDA, Petri, Thomas Mulders, and Punxs4life234.

Speed up time:
Press Circle(3), Square(5), L1, Triangle, Circle, Triangle during game play. A message will confirm correct code entry. Repeat this code to increase its effect.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.

Different costume:
Press Right, Down, Left, Up, L1, L2, Up, Left, Down, Right during game play. A message will confirm correct code entry.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.

Note: This code can also be used to get invisible weapons. First, have a weapon in your inventory. Then, enable the "Different costume" code. Once you have changed costumes, you should be holding a weapon but you cannot see it. Note: Pressing R2 or L2 to change weapons will change it back to a visible weapon again.
paney kayne.

Pedestrians riot:
Press Down, Up, Left, Up, X, R1, R2, L2, L1 during game play. A message will confirm correct code entry. Note: Saving the game will make the effects of this code permanent.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.

All pedestrians have weapons:
Press R2, R1, Triangle, X, L2, L1, Up, Down during game play. A message will confirm correct code entry. Some pedestrians will throw bombs or shoot at you if you steal their car. Note: Saving the game will make the effects of this code permanent.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, WS, and others.

Pedestrians attack you:
Press Down, Up, Left, Up, X, R1, R2, L1, L2 during game play. A message will confirm correct code entry. Note: Saving the game will make the effects of this code permanent.
Gxp via WISBIZKIT69, Adam Santilllana, Carl Buckley, and others.