NOTE:  Be aware that using any cheats can disable achievements for GTA IV!

Change the Weather & Time of DayTo randomly change the weather and time of day, break out your cell phone and insert the following number: (468)-555-0100.

Secret Locations

Head to the internet café (or wherever you can access the internet) and insert the URL www.whattheydonotwantyoutoknow.com. If inserted properly, you’ll be brought to an in-game message board containing maps of secret locations in the game.

Health, Armor & Ammo

To refill Niko’s health and armor, insert the following number into your cell phone: (362)-555-0100. If you want to give him health, armor and refill all ammunition, insert this number instead: (482)-555-0100.

Cars

Any time you’re outside, break out your cell phone and insert the following phone numbers to unlock the vehicles listed.

Cognoscenti (Car) - (227)-555-0142

Comet (Car) - (227)-555-0175

FIB Buffalo (Car) - (227)-555-0100

Annihilator (Heli) - (359)-555-0100

Jetmax (Boat) - (938)-555-0100

Super GT (Car) - (227)-555-0168

NRG-900 (Motorcycle) - (625)-555-0100

Sanchez (Car) - (625)-555-0150

Turismo (Car) - (227)-555-0147

Weapons 1To unlock a baseball bat, grenades, M4, MP5, pistol, RPG and sniper rifle, insert the following number into your cell phone: (486)-555-0100.

Weapons 2To unlock an AK-47, knife, Molotov Cocktails, pistol, RPG, sniper rifle and Uzi, insert the following number into your cell phone: (486)-555-0150.

Adjust Your Wanted Level (an oldie but goodie)

To get rid of Niko’s wanted level, insert the following number into your cell phone: (267)-555-0100. To add stars to Niko’s wanted level, insert this number instead: (267)-555-0150.