Grand Theft Auto IV/Secrets

There are a large amount of secrets hidden in Grand Theft Auto IV. Some are simple passwords, and some are Eater Eggs, and a list of them can be found below.

Passwords
To use theses, pull up your cell phone in the game and dial the number. Easter egg:heart of the the stactrue of happniness:if you are legil to go to happyness island steal a hilicopter and fly there. then go to the feet of the stactrue of happyness jump off if u land on the top platform(if u dont then u die)then run to the doors and you will run through1  then u climb the ladder and u will see a beating heart with chains on it