Grand Theft Auto: The Director's Cut Codes -

Cheat mode:
Press Square at the player selection screen and rename your character to HAROLDHAND. His portrait will change into that of a parrot to confirm correct code entry. Begin the game and all levels will be unlocked, with all weapons, full ammunition, full armor, 9,999,990 points, 99 lives, no police, and coordinates displayed onscreen.

Soundtrack:
Insert the game disc in an audio CD player and play tracks 2 and higher to hear music from the game.

Change music:
Start any level, then press Start to pause game play. Switch the game CD with an audio CD of your choice. Resume game play. Every time a car is hijacked a random song on the CD will play. Note: Replace the game CD before completing the level.

Hint: Avoid pedestrians:
Beep the horn when driving near people.

Hint: More money:
When selling cars to the illegal car dealerships, that the faster the car the more money you will get for it. Exceptions are squad cars and ambulances.

Steal a taxi cab and stop at a sidewalk. Wait for someone to call a taxi and take them to their destination to receive money. Repeat this to receive your desired pay from this job.

Hint: Kill all twelve boy scouts at once:
Find a group of the little orange boy scouts and stand in front of them so they will come over to you. Then, lead them to an electric train station. Lead them onto the tracks and run away quickly.