Grand Theft Auto III

When not going through a normal mission, get in an Ambulance and press R3.

Save 35 pedestrians and a health refill will appear outside any of your save points.

Save 70 pedestrians and an adrenaline pill will appear outside any of your save points.

Complete the Ambulance level 12 and Infinite Run will be granted.

NOTE:You do not have to save the pedestrians consecutively. You can do it as you go through the game.

Just set your console and the game language to English, this allows you to play the game without censorship.
Now you can also hit opponents while they are on the ground, a feature that was removed from the German version.

For these codes to work, enter them during normal gameplay, whilst in any city.(Note: The speed up and slow down codes can be used multiple times to make the game even slower or faster.)

After you pay to repair your car in the Pay 'N Spray, drive back in and you can get a free paint job.

Get into a car. Drive in front of the desired car (to keep it front driving away) that you would like to drive after it's been blown up. THE CAR MUST HAVE SOMEONE IN IT. Walk up to the driver's side door. Enter the ''Blow up all cars'' code. While entering the code, Mr. GTA (or whatever his name is) will pull the driver out of the car and then get into it as it's blowing up and somehow he will not die. But as soon as you are in the car, enter the Health Code to extinguish the flame. It might not work the first time, so keep trying and eventually it will work.