Cheat mode
While playing the game, press Up to display Niko's cell phone. Press Up again to access the keypad. Then, enter one of the following codes to activate the corresponding cheat function. Once a code has been entered correctly, a new "Cheats" menu option will be available on your phone, below "Options", where you can access the cheats without having to enter the phone number again. Note: Do not save the game after enabling a code to avoid unforeseen problems. Enabling some cheats may prevent achievements from being earned.
Full health and armor
Dial "3625550100" into the cell phone. 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" into the cell phone. 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" into 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" into 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" into 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" into the cell phone. Note: This phone number translates to "COP-555-0150".
Spawn Annihilator police helicopter
Dial "3595550100" into the cell phone. Note: This phone number translates to "FLY-555-0100". This code prevents the "One Man Army" and "Walk Free" achievements from being earned. Alternately, collect all 200 pigeons (flying rats) to unlock the Annihilator police helicopter.
Spawn Cognoscenti
Dial "2275550142" into the cell phone. Note: This phone number translates to "CAR-555-0142".
Spawn Comet
Dial "2275550175" into the cell phone. Note: This phone number translates to "CAR-555-0175".
Spawn FBI Buffalo
Dial "2275550100" into the cell phone. Note: This phone number translates to "CAR-555-0100".
Spawn Jetmax
Dial "9385550100" into the cell phone. Note: This phone number translates to "WET-555-0100".
Spawn NRG-900
Dial "6255550100" into the cell phone. Note: This phone number translates to "MBK-555-0100".
Spawn Sanchez
Dial "6255550150" into the cell phone. Note: This phone number translates to "MBK-555-0150".
Spawn SuperGT
Dial "2275550168" into the cell phone. Note: This phone number translates to "CAR-555-0168".
Spawn Turismo
Dial "2275550147" into the cell phone. Note: This phone number translates to "CAR-555-0147".
Change weather and brightness
Dial "4685550100" into the cell phone. Note: This phone number translates to "HOT-555-0100".
Secret map locations
Go to a TW@ Internet Cafe, log into a computer, and enter "www.whattheydonotwantyoutoknow.com" as a URL to view maps that reveal all weapon, health, armor, vehicle, pigeon, ramp/stunt, and entertainment locations.
Rastah Color Huntley SUV
Successfully complete 10 Package Delivery missions to unlock the Rastah Color Huntley SUV.
Special friendship bonuses
Reach the indicated level of friendship with the corresponding character to unlock their special friendship ability:
Brucie
Likes: Bowling, drinking, eating, strip clubs, shows, helirides, boating
Special ability: Unlocked at 70%. Call Brucie and he will fly his chopper to you, allowing you to fast travel to various portions of the city.
Dwayne
Likes: Strip clubs, eating, drinking, shows, bowling
Special ability: Unlocked at 60%. Call Dwayne for a car full of gang members that will follow you.
Packie
Likes: Strip clubs, shows, darts, drinking, bowling, pool
Special ability: Unlocked at 75%. Call Packie and he will make you a car bomb.
Little Jacob
Likes: Darts, shows, pool, drinking, eating, strip clubs
Special ability: Unlocked at 60%. Call Little Jacob and he will drive out a car full of guns for you to buy.
Roman
Likes: Bowling, darts, drinking, eating, pool, shows, strip club
Special ability: Unlocked at 60%. Call Roman and he will send a cab for no charge.
Getting 100% completion
The following is a list of how to get a 100% completion:
Successfully complete all 90 story and procedural missions to get 68% complete.
Successfully complete all 30 car thefts to get an additional 2%.
Successfully complete all 50 stunt jumps to get an additional 2.5%.
Collect all 200 pigeons (flying rats) to get an additional 2.5%.
Find all random characters and complete their missions to get an additional 5%.
Successfully complete all 20 vigilante crimes to get an additional 2.5%.
Kill all 30 people on the list to get an additional 2.5%.
Beat friends or computers at every activity to get an additional 5%.
Get all your friend's special abilities and do all their activities to get an additional 10%. Note: This does not include Dwayne or Roman.
Easy money
Go to an ATM, then cause a traffic jam to the area. Wait for someone to take money from the ATM, then kill him or her. Make sure to block any nearby roads so the ambulance cannot get to the murdered victim. Take the money they dropped on the ground. Then, run a short distance away, and go back. The money should have respawned on the ground. You can repeat this as many times as desired. You can also kill more people taking their money from the ATM to increase the amount of money that respawns. -From: Khairol161
Easily lower wanted level
If you want to get rid of your wanted level, simply start a mission. Your wanted level will instantly go away. If there were any police cars chasing you, the police will be gone but the cars will still be there. -From: D2
Repairing engine
If the vehicle you are driving breaks down and the engine will not start, call "911", and your engine should start again.
Parking more vehicles
Outside your first hideout is a small parking area to park your vehicles and save them. Instead of parking your vehicles fully within the lines, you can park your vehicles partially within the lines to allow for more vehicles to be parked and saved. -From: Zane
At the start of the game it would appear that you can only save two cars parked in the "Residents Parking Only" parking spaces in front of your safe house. However, if you can find other "Residents Parking Only" places around the city, you can also save cars there even if you do not have a safe house at those locations yet.
Fast travel
To avoid wasting time driving all the way across the city, call a taxi. They will take you to your destination for your mission, stores, safe houses, or even a waypoint marker. You can skip through the taxi ride, allowing you to travel across the entire city in about ten seconds. This can also be done during missions.
Easy headshots
It is sometimes difficult to get headshots, which do count. With some practice, doing the following is an easy way to get headshots. Press [Auto-Aim], then use the Right Analog-stick to move the auto-aim target around your victim's body. Barely move the Right Analog-stick as you are shooting. This puts bullets in the chest and head, and results in an easy instant kill.
Easy emergency vehicles
Dial "911" on your cell phone. You will reach a voice menu that allows you to call the police by dialing "1", an ambulance by dialing "2", or a fire truck by dialing "3". Select the vehicle of your choice, and wait for them to arrive. They will stop and look around for the emergency, allowing you to easily steal their vehicle.
Getting away from police
When running away from the cops, you will have a circular area in which they look for you. However, if you get out and another cop sees you, it changes. To use this to your advantage, barely get out of that circle, which you will see on your radar. Then, just sit there for about five seconds instead of flooring past it.
If you are at a four star wanted level or less, find a place with grass or sand. The cops will follow you in, but they usually cannot get back out. You can then just drive away.
Regaining health during missions
You can leave the mission area and go to a Cluckin' Bell, hotdog stand, etc. and eat food to replenish your health if you are low and cannot find a health pack. This is especially useful on missions where there are no health packs in sight. Note: You can also take a taxi to those locations during missions.
Avoiding taxi fares
To get free taxi rides, hail a cab, and select your destination, but do not choose the quick way by pressing A. Instead, let the cab driver take you to your destination the normal way. When you are approximately two blocks away from your destination, break the window, and start shooting. The cab driver will get out and run away, allowing you not to have to pay for the ride. You can also kill the cab driver and take his money, so he is actually paying you for the taxi ride. -From: DemonUrameshi Naruto
Avoiding toll booths
Drive through any toll booth with any emergency vehicle with the sirens on. The booth attendant will open the gate, and you will save $5.
Free health boost
Enter an ambulance to get a small health increase.
Free shotgun shells
Enter a police cruiser to get five shotgun shells.
Getting Desert Eagle early
To get the Desert Eagle before you can buy it, kill the gun salesman in Broker that has it equipped, and then take it from him.
$100 for all ringtones and themes
After getting the phone from Playboy X, go to the nearest Internet cafe. Buy all of the ringtones and themes from the ringtones site. Log out of the computer, and you will notice that you only paid $100 for all ringtones and themes.
Hidden shirt
There is a secret Happiness Island shirt laying at the highest point on the statue's base that can be reached by foot. It looks like a glowing red rectangle. Once it is picked up, Niko will automatically put it on. It is a navy blue sweatshirt. The front shows the statue and reads "Happiness is..." and is continued on the back with the word "...land".
Shooting people with water cannon
Steal a fire truck, then press [Fire] while driving around to shoot the super water cannon at people around you. You will get many funny reactions from the people that you shoot with it.
Easy strikes in bowling
Select the first lane (all the way to the left). Take two full steps to the left. Hold Right Analog-stick Down for about a half second, then press Right Analog-stick Up. Do not add any aftertouch to the throw.
View Statue Of Happiness' heart
Once you gain access to Happiness Island, find the Helicopter Tours, which is directly east of Happiness Island, and steal a helicopter. Fly to Happiness Island and over the Statue Of Happiness, then jump out of the helicopter at the statue's feet. You should land on the top-most tier of the statue, which is basically a square platform with a door in the center of each side. Run around the platform until you see a door with a plaque on either side of it that reads, "No Hidden Content Here". It may seem like you cannot go through the door, but you can -- it doesn't open, you simply walk through the door. You will find an empty room with a tall ladder inside. Climb it, and when you reach the top, look up to see a huge beating heart, held in place by chains.
Phone numbers
Dail one of the following numbers on Niko's cell phone to call the indicated service:
Emergency Services: Dial "911" to summon the police, fire department, or an ambulance.
Zit Song Identifier: Dial "948-555-0100" if you hear a song you like on the radio, dial this number to get a text message with the name and artist of the song.
Police database
Go to a TW@ Internet Cafe, log into a computer, and enter "www.libertycitypolice.com" as a URL to go to the Liberty City Police Department website. Click the "Database" tab at the bottom of the home page to get information on all characters, including Niko and Roman.
Wanted as a pedophile
Go to a TW@ Internet Cafe, log into a computer, and enter "www.littlelacysurprisepageant.com" as a URL to get an instant five star wanted level as a pedophile.
Internet websites
Go to a TW@ Internet Cafe, log into a computer, and enter one of the following URLs to visit that site:
limevenus.blogsnobs.org
mail.eyefind.info
pychakilla.blogsnobs.org
www.americantravelguide.net
www.antfarmcam.net
www.area53site.com
www.artthrob.org
www.a-thousand-words.net
www.autoeroticar.com
www.babiesovernight.com
www.beanmachinecoffee.com
www.bigdog.blogsnobs.org
www.blogsnobs.org
www.bruciesexecutivelifestyleautos.com
www.bulimialovers.com
www.burgershot.net
www.chiropracticovernight.com
www.craplist.net
www.darksoullock.blogsnobs.org
www.designerslave.com
www.domestobotlovers.com
www.dragonbrainthemovie.com
www.easterislandcoverup.com
www.eatbiglogs.com
www.eddielowfilthslayer.blogsnobs.org
www.elchamucoroboto.com
www.electrictit.com
www.electronicwritingtablet.com
www.erisfootware.com
www.eugenicsincorporated.com
www.eunux.net
www.eyefind.info
www.fantasyleaguebatswingers.com
www.fefighter2008.blogsnobs.org
www.fistfans.com
www.flyhighpizzapie.com
www.freejames.org
www.friendswithoutfaces.net
www.fruitcomputers.com
www.gloryholethemepark.com
www.goldberglignerandshyster.com
www.golfloversonline.net
www.grype.org
www.hand-jobs-online.com
www.happyfarmersupplies.com
www.heritagenothate.org
www.homecremation.com
www.homeworkfriend.org
www.hornyhighschoolreunions.com
www.huganimals.com
www.ilovetoblow.org
www.inyapuper.blogsnobs.org
www.krapea.com
www.leftover-vacations.com
www.liberatedwoman.blogsnobs.org
www.libertycitypolice.com
www.libertycityrealestate.net
www.libertytreeonline.com
www.liesdamnlies.net
www.lipurgex.com
www.littlelacysurprisepageant.com
www.lootandwank.com
www.love-meet.net
www.loveyourmeat.com
www.modderstotallyrule.com
www.money2makemoney.com
www.myonlineme.com
www.myroomonline.net
www.onlineradiorevolution.com
www.our-own-reality.com
www.outdatedtastes.com
www.outsourceforamerica.com
www.peepthatshit.com
www.pinktorpedo.org
www.piswasser.com
www.pointclickshipabitch.com
www.poker-in-the-rear.com
www.publiclibertyonline.com
www.redwoodcigarettes.com
www.roidsforlittleboys.com
www.rustybrownsringdonuts.com
www.sh*tster.de
www.sprunksoda.com
www.stopshavingnow.net
www.thebankofliberty.com
www.tobaccofacts.net
www.vipluxuryringtones.com
www.weazelnews.com
www.whattheydonotwantyoutoknow.com
www.whymommygotfat.com
www.yourmexicandoctor.com
www.yournewbabysname.com
Grand Theft Auto: San Andreas and Red Dead Revolver references
Watch the Weazel and CNT channels on the television at your hideout. You will see various locations from GTA: San Andreas, and also a commercial that uses scenes from Red Dead Revolver, which is another Rockstar game.
Hillary Clinton reference
The Statue Of Happiness is actually Hillary Clinton. She is holding a steaming cup of coffee or latte, and her clipboard simply reads "Hillary Clinton".
Ricky Gervais reference
Take a friend such as Jacob or Packie to the Split Sides comedy club near the Star Junction area to see a virtual stand up routine featuring Ricky Gervais.
Easy "One Man Army" achievement
Go to the bridge that takes you to the second island and has train tracks under it. Walk along the train tracks towards the second island before you are allowed to cross the bridge. When you are about half way, you should have a six start wanted level. Then, just stand on the train tracks for five minutes to get the achievement. You do not have to worry about the police because they will be on the bridge above you so they cannot shoot, and the helicopters are above you so you have cover from them.
Go to the hospital at the north-west corner of Algonquin. You can also get there by dying in that general area. Get a motorbike. Set a Waypoint at the hospital or just remember the way you came. Drive to the nearby bridge that takes you to the third island. You must not have access to the third island for this trick to work. Slowly reverse backwards over the barricade on the bridge until you get a six start wanted level. Then, drive straight back to the hospital. To the right of the hospital as you are coming back is a little red fence that you can bust through and get onto the elevated train tracks. Wait there for approximately five minutes to get the achievement. No cars can get to you on the train tracks and the helicopters cannot shoot accurately enough to hit you at motorcycle speed.