Full health and armor

      Dial "3625550100" on the cell phone. If you enter this code while in a vehicle, it will also repair it. Note: This phone number translates to "DOC-555-0100". This code prevents the "Cleaned The Mean Streets", "Finish Him", "One Man Army", and "Walk Free" achievements from being earned.
      Full health, armor, and ammunition

      Dial "4825550100" on the cell phone. If you enter this code while in a vehicle, it will also repair it. Note: This phone number translates to "GTA-555-0100". This code prevents the "Cleaned The Mean Streets" achievement from being earned.
      Weapons tier 1

      Dial "4865550100" on the cell phone. This will unlock the baseball bat, handgun, shotgun, MP5, M4, sniper rifle, RPG, and grenades. Note: This phone number translates to "GUN-555-0150". This code prevents the "Cleaned The Mean Streets" achievement from being earned.
      Weapons tier 2

      Dial "4865550150" on the cell phone. This will unlock the knife, Molotov cocktails, handgun, shotgun, Uzi, AK47, sniper rifle, and RPG. Note: This phone number translates to "GUN-555-0100". This code prevents the "Cleaned The Mean Streets" achievement from being earned.
      Remove Niko's wanted level

      Dial "2675550100" on the cell phone. Note: This phone number translates to "COP-555-0100". This code prevents the "One Man Army" and "Walk Free" achievements from being earned.
      Add one star to Niko's wanted level

      Dial "2675550150" on the cell phone. Note: This phone number translates to "COP-555-0150".
      Spawn Annihilator police helicopter

      Dial "3595550100" on the cell phone. The Annihilator is armed with rockets. Note: This phone number translates to "FLY-555-0100". This code prevents the "One Man Army" and "Walk Free" achievements from being earned.
      Spawn Cognoscenti

      Dial "2275550142" on the cell phone. Note: This phone number translates to "CAR-555-0142".
      Spawn Comet

      Dial "2275550175" on the cell phone. Note: This phone number translates to "CAR-555-0175".
      Spawn FBI Buffalo

      Dial "2275550100" on the cell phone. Note: This phone number translates to "CAR-555-0100".
      Spawn Jetmax

      Dial "9385550100" on the cell phone. Note: This phone number translates to "WET-555-0100".
      Spawn NRG-900

      Dial "6255550100" on the cell phone. Note: This phone number translates to "MBK-555-0100".
      Spawn Sanchez

      Dial "6255550150" on the cell phone. Note: This phone number translates to "MBK-555-0150".
      Spawn SuperGT

      Dial "2275550168" on the cell phone. Note: This phone number translates to "CAR-555-0168".
      Spawn Turismo

      Dial "2275550147" on the cell phone. Note: This phone number translates to "CAR-555-0147".
      Change weather and brightness

      Dial "4685550100" on the cell phone. Note: This phone number translates to "HOT-555-0100".