Grand Theft Auto IV Hints & Cheats

Enter the following password into the in-game computers.

At any time during the game, pull out Niko's phone and dial these numbers for the desired effect.

Please note that cheats will affect missions and achievements.

By gaining friendship with the following people can benefit you in many ways.

Complete each condition to get the allotted Trophies. There are 42 Bronze Trophies, 5 Silver Trophies, 3 Gold Trophies, and 1 Platinum Trophy.

First, you'll have to have access to Happiness Island. Once you're able to go there legally, find the Helicopter Tours (which is directly east of Happiness Island) and steal a helicopter. Fly to Happiness Island and over the Statue of Liberty, then jump out of the helicopter at the statue's feet. You should land on the topmost tier of the statue, which is basically a square platform with a door in the center of each side. Run around the platform until you see a door with a plaque on either side of it that reads, "No Hidden Content Here." It may seem like you cannot go through the door, but you can-- it doesn't open, you simply walk THROUGH the door. Inside, you'll find an empty room with a tall ladder. Climb it, and when you reach the top, look up; there is a gigantic beating heart, held in place by chains.

Go to an ATM, then cause a traffic jam to the area. Wait for someone to take money from the ATM, then kill him or her. Make sure to block any nearby roads so the ambulance cannot get to the murdered victim. Take the money they dropped on the ground. Then, run a short distance away, and go back. The money should have respawned on the ground. You can repeat this as many times as desired. You can also kill more people taking their money from the ATM to increase the amount of money that respawns.

If the vehicle you are driving breaks down and the engine will not start, call any number from your phone book, and your engine should start again.

Go to the statue of liberty and walk up to the second level. Walk through the door (it doesn't swing open, just go through it) and the game will load for a second and you will walk out with a new t-shirt with the statue of liberty on it.