Grand Theft Auto 4

Quickly access phone number cheats:
To quickly redial a cheat,
at the bottom of your phone menu select "Cheats" to display all the
cheats you have previously dialed in. You will not have to wait for the
call to go through.

Phone number cheats:
Press up to
access your cell phone and press up again to access the keypad. Unlock
the following cheats by dialing the corresponding numbers:

CHEAT FUNCTION - PHONE NUMBER
Climate Change - HOT-555-0100
Full Armor & Health - 362-555-0100
Full Armor/Health/Ammo & Fix Damaged Car - 482-555-0100
Identify Songs on the Radio - 948-555-0100
Raise Wanted Level - 267-555-0150
Remove Wanted Level - 267-555-0100
Spawn Annihiliator Police Helicopter - 359-555-0100
Spawn Burrito - 2826-555-0150
Spawn Cognoscenti - 227-555-0142
Spawn Comet - 227-555-0175
Spawn Double T - 245-555-0125
Spawn FBI buffalo - 227-555-0100
Spawn Hakuchou - 245-555-0199
Spawn Hexer - 245-555-0150
Spawn Innovation - 245-555-0100
Spawn Jetmax - 938-555-0100
Spawn NRG-900 - 625-555-0100
Spawn Police Chopper - FLY-555-0100
Spawn Sanchez - 625-555-0150
Spawn Slamvan - 826-555-0100
Spawn Turismo - 227-555-0147
Spawn SuperGT - 227-555-0168
Weapon Package #1 - 486-555-0150
Weapon Package - 486-555-0100

Gang Wars unlockables:
Unlock the following weapons by completing the corresponding number of Gang Wars:

WEAPON - GANG WARS
Assault shotgun in safehouse - Complete 40 gang wars.
Automatic pistol in safehouse - Complete 20 gang wars.
Carbine Rifle in safehouse - Complete 30 gang wars.
Grenade launcher in safehouse - Complete 50 gang wars.
Sawed-off shotgun in safehouse - Complete 10 gang wars.

Hokachu bike from Clay:
Unlock the following bikes by performing the corresponding tasks:

BIKE - HOW TO UNLOCK
Bati 800 - Complete all of angus's bike theft missions.
Hokachu - Beat 12 races in single player mode.
Innovation - Kill all 50 seagulls.

Unlockable vehicles:
Unlock the following vehicles by performing the corresponding tasks:

VEHICLE - HOW TO UNLOCK
Annihilator Helicopter - Kill all 200 pigeons.
Rastah Color Huntley SUV - Complete 10 package delivery missions.

Friendship bonuses:

FRIEND / FRIENDSHIP LEVEL - BONUS
Alex at 80% - Gives you a discount at clothing stores for 24 hours.
Brucie at 90% - Flys his helicopter to you.
Carmen at 75% - Replenishes your health.
Dwayne at 60% - Ships you a car full of gangsters who will protect you.
Kiki at 75% - Clears your wanted level (when out of missions and under two stars).
Little Jacob at 60% - Ships you a car full of guns which you can purchase.
Packie at 75% - Makes you a car bomb.
Roman at 60% - Sends a taxi for you to drive throughout Liberty City.
Stevie
- Complete all 30 of his vehicle thefts. The South Bohan garage will
then give you more money for each vehicle that you deliver.

Resurrect dead cars:
To resurrect dead cars, dial 911 on your cell phone and hang up when they pick up.

Happy statue easter egg:
Navigate
to the statue of happiness on happiness island by way of helicopter.
Have the helicopter set you down on the very top of the statue. You'll
see a sign up there that says "No Hidden Content Beyond This Point". If
you head inside of the statue from this point, you'll see an actual
beating heart inside the statue.

Fire truck water cannon:
Steal a fire truck, and push the fire button while driving. This will fire the super-powerful water cannon.

Crank calls:
Dial the phone numbers written in odd places, such as on the side of a building. You can crank call someone on the other end.

GTA3 outfit:
When
you have to decide whether to kill Dwayne or Playboy X, kill Playboy X.
You will be able to use his loft and change clothes there.

Reveal item locations at internet cafe:
To
reveal map locations of all weapons, health, armor, vehicles, pigeons,
ramp/stunt, and entertainment, log onto a computer at TW@ Internet Cafe
and go to www.whattheydonotwantyoutoknow.com.

Free taxi ride:
Just
before you reach your destination hold L1 to smash the window and scare
the taxi driver away. You must have a gun equipped in order to do this.

Change police siren sound:
While driving in a LCPD cruiser press the left-analog stick.

Erase wanted level:
Do any one of the following to erase your wanted level:

1. Enter any mission marker(not date markers).
2. While in a police vehicle, activate any of the vigilante or most wanted missions.
3. Call a friend from outside of the radar zone.

Gun shop hint:
After killing the owner of the gunshop you can shop there again if you change clothes.

Lower wanted level:
To lower your wanted level, start a mission or enter a safehouse and save the game.

Tug boat:
There
is a tug boat located between Alderny and the industrial island in
front of two barges. You will need another boat to get to it. Once near
it, jump on it and hit the enter vehicle button. You can just cruise
from there.

Armored truck money:
To get the money inside an armored truck, steal it and blow it up.

Blowout tires:
To perform a burnout, hold L+R while for a little while. The back tires will blowout one after another.

Police car hints:
While
inside a police car press L1 to have the data bank display wanted
people. You can search names and call three police cars for backup.

Free shotgun:
Steal a police car to pick up a tactical shotgun with 5 bullets.