Cheat mode In the game, you can use Niko’s phone to enter the following cheat codes and activate the corresponding cheat functions. Note: don’t save your game after using them, to avoid unforeseen problems. Some cheat codes may affect achievement unlocks.
Replenish health Dial “ 3625550100 “ on your phone. Note: this code affects the achievements for “Cleaned The Mean Streets”, “Finish Him”, “One Man Army”, and “Walk Free”.
Replenish health and ammo Dial “ 4825550100 “ on your phone. Note: this code affects the achievement for “Cleaned The Mean Streets”.
Weapons tier 1 Dial “ 4865550100 “ on your phone. This unlocks the baseball bat, pistol, shotgun, mp5 , M4, sniper rifle, RPG and grenades. Note: this code affects the achievement for “Cleaned The Mean Streets”.
Weapons tier 2 Dial “ 4865550150 “ on your phone. This unlocks the knife, Molotov cocktails, pistol, shotgun, Uzi submachine gun, ak47 , sniper rifle, and RPG. Note: this code affects the achievement for “Cleaned The Mean Streets”.
Remove wanted level Dial “ 2675550100 “ on your phone. Note: this code affects the achievements for “One Man Army” and “Walk Free”.
Increase wanted level by one Dial “ 2675550150 “ on your phone.
Get an Annihilator Dial “ 3595550100 “ on your phone. Note: this code affects the achievements for “One Man Army” and “Walk Free”.
Get a Cognoscenti Dial “ 2275550142 “ on your phone.
Get a Comet Dial “ 2275550175 “ on your phone.
Get an FBI Buffalo Dial “ 2275550100 “ on your phone.
Get a Jetmax Dial “ 9385550100 “ on your phone.
Get an NRG-900 Dial “ 6255550100 “ on your phone.
Get a Sanchez Dial “ 6255550150 “ on your phone.
Get a SuperGT Dial “ 2275550168 “ on your phone.
Get a Turismo Dial “ 2275550147 “ on your phone.
Change the weather and brightness Dial “ 4685550100 “ on your phone.
Map locations In the game, use a computer at an internet cafe to enter “www.whattheydonotwantyoutoknow.com“, and you’ll get information on all locations (such as where to find weapons, vehicles, leisure spots, etc.).
Easy money Go to an ATM, then cause a traffic jam in the area. Wait for someone to withdraw money from the ATM, then kill them. Be sure to block the nearby roads, so that an ambulance can’t get in to rescue anyone. Pick up the money they drop on the ground, then run some distance and come back. The money will respawn on the ground. You can repeat this process. You can also kill more people who are withdrawing money from the ATM to increase your money-farming efficiency.
Repair the engine If your vehicle becomes undrivable or the engine won’t start, dial 911 and the engine will restart.
Avoid toll booths Drive any emergency vehicle with its siren on through any toll booth. The attendant will open the gate, and you’ll save five dollars.