Grand Theft Auto IV is an installment of the adult rated Grand Theft Auto video game series, which is also known as GTA for short. There are numerous Grand Theft Auto 4 cheats available, which allow players to do everything from earning infinite amounts of money to regaining full health. This page lists some of the most popular cheat codes and also offers information about hidden items and game secrets.

These codes are to be used on Niko Bellic's cell phone. Be warned that these cheats may disable game achievements. This is why a player should usually not save his game after using some cheats.http://www.scribd.com/doc/2951439/Grand-Theft-Auto-IV-Cheats

• Full health and armor: 3625550100
• Full health, ammo and armor: 4825550100
• Spawn Sanchez: 6255550150
• Spawn Cognoscenti: 2275550142http://www.cheatcc.com/xbox360/grandtheftauto4cheatscodes.html
• Spawn Annihilator: 3595550100
• Replenish health: 4825550100
• Get armor: 3625550100
• Remove wanted level: 2675550100
• Raise wanted level: 2675550150
• Alter weather and brightness: 4685550100
• Spawn GTA4 Turismo: 2275550147
• Spawn SuperGT: 2275550168http://www.scribd.com/doc/2951439/Grand-Theft-Auto-IV-Cheats

Besides cheat codes that unlock a number of things in the game, Rockstar North has also included a number of easter eggs.http://www.eeggs.com/tree/11931.html

• The Statue of Happiness contains a heart.

• One of the contestants on the "I'm Rich" television game show goes to the school featured in the Bully Scholarship Edition video game.

• Previous characters from the Grand Theft Auto Series appear in numerous television shows throughout this release.IGN: Grand Theft Auto IV Secrets FAQ

• To obtain money, go to an ATM machine and create a traffic jam. When a person uses the ATM machine, kill them. Block off the streets so that no ambulance will get through. Grab the cash the victim drops. Take a quick run then return. The cash will be there again. The player can repeat this process many times.

• If a player's car breaks down and he can not restart it, he can call 911. Then, it will be repaired.