Tips
Secret map locations
Go to any 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.
Liberty City Maps - Google style
GTA 4 Liberty City Map Images and Screenshots
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
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.
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, safehouses, 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.
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.
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.
$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.
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.
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.
Helicopter with rockets
Collect all 200 pigeons (flying rats) to unlock a helicopter with rockets.