Grand Theft Auto III Cheats

Start a Taxi Mission, pick up someone, and drop em' off. Now, go to pick someone else up, but make sure they don't get in your taxi until the time is at exactly 0 seconds left. The timer should disappear, but the passenger will not leave your vehicle. You can now continue doing taxi missions without the timer, until you quit the mission or blow up your cab.

If you want to go to Staunton Island, but don't want to have to complete the missions in portland, then first enter the code chittychittybb. Next, steal a police car and head onto the broken freeway. Go as fast as you can and when you reach the broken part your car will begin to hover. All you do now is just make sure you don't land in the water and then you're in Staunton Island without completing any missions.

Get an ambulance and drive to the entrance to the Porter Tunnel. Park the ambulance on the left footpath right up against the blue barrier (back facing the barrier). Now jump on top of the ambulance and then jump again. You will end up in "Blue Hell" on top of the tunnel. Now jump over the barrier and continue to run but make sure to stay on the far left side. Keep running following the tunnel to the left until you hit an invisible wall now simply fall off and you will drop from Blue Hell onto Staunton Island a little north of the hospital. To get to Shoreside from here simply take the Porter tunnel as there is no barrier blocking you (the barrier is still in Portland).

This works 100% on the PS2 however on the PC 50% of the time you may need a grenade and full armour as you may get stuck on top of the ambulance so you will need the grenade to blow the ambulance to knock you above the tunnel. Enjoy!

Before you start, make sure you have armor and your health is at 100. Drive to the subway down the street from your house save location and drive your car down the ramp and onto the subway tracks turn right and stay on the left side of the track so the subway doesn't hit you. Keep going until you see on the screen 'St. Francis Airport' drive up to the point where the tunnel has a curve park your car on the left side of the tracks, and get out and go to the right side and hug the wall as tight as you can and wait for the subway to come. Once it comes, let it hit you and you might have to move to the right a little once it hits you so that you go through the wall or sometimes you'll fall through the floor. You should see your character falling through this green or blue screen and then the loading screen should come up and say 'Welcome to Shoreside Vale'. You'll fall right outside or near the airport.
Note: If you die you'll go back to Staunton Island.

Steal an FBI car and take it to paint and body. Get it fixed and when you hit the button to turn on the lights while moving, it will have hydros and jump over other cars.

Instead of holding down the sprint button, tap it rapidly and you will be able to run alot further before getiting tired.