Grand Theft Auto 3

Cheat codes:
Note! If you save your game with some of the cheatcodes activated you cannot deactivate them again.

All Weapons:
While playing, press R2, R2, L1, R2, Left, Down, Right, Up, Left, Down, Right, Up

Full Health:
While playing, press R2, R2, L1, R1, Left, Down, Right, Up, Left, Down, Right, Up

Full Armor:
While playing, press R2, R2, L1, L2, Left, Down, Right, Up, Left, Down, Right, Up

Higher Wanted Level:
While playing, press R2, R2, L1, R2, Left, Right, Left, Right, Left, Right.

Lower Wanted Level:
While playing, press R2, R2, L1, R2, Up, Down, Up, Down, Up, Down.

More money:
While playing, press R2, R2, L1, L1, Left, Down, Right, Up, Left, Down, Rithg, Up

Tank:
While playing, press Circle, Circle, Circle, Circle, Circle, Circle, R1, L2, L1, Triangle, Circle, Triangle.

Speed up time:
While playing, press Circle, Circle, Circle, Square, Square, Square, Square, Square, L1, Triangle, Circle, Triangle.

Change outfit:
While playing, press Right, Down, Left, Up, L1, L2, Up, Left, Down, Right.

People fight each other:
While playing, press Down, Up, Left, Up, X, R1, R2, L2, L1.

All people hate you:
While playing, press Down, Up, Left, Up, X, R1, R2, L1, L2.

Crazy people:
While playing, press R2, R1, Triangle, X, L2, L1, Up, Down.

Peaple fistfight each other:
While playing, press Right, R2, Circle, R1, L2, Down, L1, R1.

Improved car handling:
While playing, press R1, L1, R2, L1, Left, R1, R1, Triangle.

Blow up all cars:
While playing, press L2, R2, L1, R1, L2, R2, Triangle, Square, Circle, Triangle, L2, L1

Gore Mode:
While playing, press Square, L1, Circle, Down, L1, R1, Triangle, Right, L1, X.

Clear Weather:
While playing, press L1, L2, R1, R2, R2, R1, L2, Triangle.

Foggy Weather:
While playing, press L1, L2, R1, R2, R2, R1, L2, X.

Cloudy Weather:
While playing, press L1, L2, R1, R2, R2, R1, L2, Square.

Rainy Weather:
While playing, press L1, L2, R1, R2, R2, R1, L2, Circle.

Free repairs:
To repair your car for free, go to your hideout and put your car in the garage.
Leave the garage so the door closes.
Enter the garage again and your car will be as good as new.
Note! This does not get rid of the cops.
It only fixes the damage.

Marathon runner:
The hero in GTA3 gets tired of sprinting after holding X down too long.
To overcome this tap X quickly and he will runner faster and longer than Forrest Gump himself.

Unlock Staunton Island:
You have to complete the last Mafia Mission (by sinking the Cartel ship)

Unlock Shoreside Vale:
You have to finish the mission from Donald Love in wich you have to kill Kenji of the Yakuza

Prostitute Trick:
This trick works best in the Red Light District.
Get any car, except for a police car, FBI car, Ambulance, Fire Truck or Taxi, and pull alongside the sidewalk next to a girl wearing a Brown or Pink outfit.
She will walk over to the car and begin bending over, like she's talking to you.
A few seconds later she will get in the car.
Drive to a secluded area (or your hideout) and stop the car.
Be quick about it, because your money will drain for the amount of time she's in the car.
Once the car is stopped, it will begin rocking.
It'll rock slow, then it'll get faster.
Your health is replenishing, but your money is depleting.
Using the prostitute, you can get your health up to a maximum of 125. When you reach the maximum health, she'll get out of the car.
Now, if your feeling particularly cold-blooded, you can get out of the car, chase after the prostitute, beat her, and take your money back.

Finding the fastest car in Portland:
Stuck in Portland and can't find yourself a good car? Head to the car dealership next to 8-ball's place and drive through the windows to find yourself a Viper!

Make your car "fly":
With the code where the pedestrians fight, it along with the improved handling cheat can make the car "fly".
When you are at an incomplete bridge, like if you haven't gotten to Shoreside vail from Stautan Island, you get past the barricades, and be careful not to floor it for too long or you will lose control (be familiar with the brakes.) But when you get to the straightaway, floor it and dont move the joystick.
When you are in the air with the descent pull the joystick back and you go even further and you land on the bridge - simply the cheats to get all places - except you can't save.

Drive-by:
To do a great drive by killing equipt the uzi's and go into first person mode while in the car.
Then press and hold L2 or R2 to look out of the left or right side window.
Then while holding one down press Circle to fire the uzi and mow down people on the side-walk

Bulletproof Patriot:
Complete the mission from Ray (the cop) on Stanton Island called "Marked Man" and you will recive the keys to his stash.
This contains a flamer, rocket launcher and a lot of cash as well as a bulletproof Patriot.

Monotov Cocktail (portland):
Go through the tunnel near 8 balls place and kill the 4 tramps inside.
Each of the tamps is carrying a monotov cocktail.
(They won't throw them at you bu they will run)

Rampage Sniper Trick:
For rampages in which you are required to shoot down other gang members with a sniper, if you release R1 after killing one and press it again after like a split second, more targets will appear on the screen.

Car trick:
This is really a cheat, but more of an interesting thing I found.
First park a car in the garage at your hideout.
Go out of it but stay close enough to it that the door stays open.
Before doing this, make sure you have full armor and health, plus a rocket launcher.
Aim the launcher at the car and fire.
You'll be propelled outside, but if you go inside the garage, the car will be good as new, and on occassion, a different car.

Hydro-car:
Get in the red car with yellow top by the construction site in the second board and you will get the car with hydros.
It hops and stuff...