More cars in garage:
You can fit more cars in your hideout's garage than you are supposed to. In district two, the garage should only hold two cars but you can fit four in (or five if they are small). Park the first two besides each other next to the wall. Then, park each car after that next to the door. Get out and the door will open. Quickly drive the car in before the door shuts. Now all three or four cars are saved. In order for this to work you need to park them very close together.
Custom music:
Copy some of your favorite MP3 files into the "mp3" folder in the game folder. Start the game and you will have a new radio station titled "mp3 player". Choose it to hear your own selections.
Custom skin:
Open the "skin" folder in the main game folder. Copy the skin "playa2.bmp" into any desired folder, then rename it "playa3.bmp". Open the "playa3.bmp", into MS Paint, Adobe Photo Shop, or another graphics program. Re-color and customize it as desired, then copy it back into the "skin" folder in the main game folder. Start the game, go into "Player Options", and choose your new skin.
Regain health with prostitute:
Car jack any vehicle and drive up to a prostitute walking the streets. Stop and let her approach the car, after a few seconds of talking, she will get in. Drive to a remote area where there are not any cops around (a good place is in your hideout). Stop the car, but do not get out. After about two seconds, the car will start rocking back and forth. You will recover approximately 40 to 50 points of health. When it is over, she will exit the car and walk away, but not before she charges you a fee. At this point you can beat her up and take back the money you just paid her. Note: The prostitute will fight back when you try to take your money back. If for any reason you both have to exit the car before it starts rocking, you will still be charged a fee (beat her up to take it back). You cannot do this with the same prostitute twice in one night -- you can however, pick up another prostitute and recover more health. Even though the maximum amount of health points is 100 when you start the game, it increases to 125 after the encounter and remains that way.
Free car repair:
Park your car in a garage and save the game. Note: This only works when you are not in a mission.
Fly the Dodo:
While on the runway of the airport in Shoreside Vale, you can get a dodo in one of the hangars. The easiest one is near the helicopter pad in the back of the airport. Bring it on the runway. Once there, back it up all the way to the end so that it is facing Staunton Island. Hold [Down] + X. Note: Look toward the side view of the plane to get a better view before it scratches the ground and crashes. While accelerating, immediately before the plane's nose sparks the ground is going its full speed, release every thing and the plane it will take off on its own. Once in the air, you are now able to use the cursor keys to steer the plane. Tap the keys and do not hold them for a safer flight. Keep the plane closer to the ground as it keeps trying to go up. However, every once in a while let it climb then do a nose dive to get more speed.
Portland: Get to Staunton Island early:
In the "Last Request" mission, it is possible to "maroon" the Japanese girl. To do this, look for the closest "island" when you pick her and Maria up. Get to the island and back the boat up a slope. You will hear crunching sounds. Experiment, and sooner or later she will drop off the boat and onto the island. From there, get to Staunton Island. You can cruise around and do everything else except take up any missions or side jobs. Kill Maria or the Japanese girl and the mission will end.
Find a very fast car, such as the Banshee in the shop at 8-Balls. Drive to the bridge and stop at the beginning. Enable the chittychittybb code. Accelerate, and if you are lucky, you will fly over the gap and land on the other side. It will take some practice before you succeed. Test it with different distances before the edge.
Staunton Island: Get to Shoreside Vale early:
Find a very fast car, such as the Banshee in the shop at 8-Balls. Drive to the bridge and stop at the beginning. Enable the chittychittybb and cornerslikemad codes. If you sound the horn with the codes activated, you will make a small jump. This makes it possible to jump over the gap. Sound the horn just when you reach the edge. However, when you reach high speeds the car starts to fly automatically. When this happens, you will not be able to make that little extra jump.
Enable the cornerslikemad code and drive to the hospital. From the road directly in front of the hospital, build up some speed then press [Shift] to make your car jump. You will land on a roof on the hospital. Without falling, drive into a building composed of glass windows. You will then fall into the tunnel leading to Shoreside Vale.
Big 'n' Veiny mission: Easy completion:
Start El Burro's "Big 'n' Veiny" mission by following the trail of magazines until you reach the top of the large hill where the Mafia mansion is located. Instead of turning right and following the trail down the hill, go straight and go down the grass cliff. You will end up in the Portland dock area, and will be very near the car that the magazine trail leads to. Find this van and kill the man next to it to stop the timer and complete the mission.
Cutting The Grass mission: Easy completion:
To complete Salvatore's "Cutting the Grass" mission easily, instead of having to trail the snitch for the whole time, go straight to the Portland docks. When you get there, drive to the boat with the ramp leading up it. There is a staircase attached to the outside of the nearest building. Climb this and stop where you can see the ramp easily. This allows you to completely avoid the risk of spooking the snitch and gives you a good angle to shoot him from.
Stay in your car and run him over to pass the mission with ease.
Dead Skunk In Da Trunk mission: Easy completion:
The Forelli brothers are very stupid and cannot maneuver out of tight spaces. Lead them into the tunnel (one brother is located at the parking lot of the café; the other is in front of the tunnel), thereby giving you time to shoot away at them. Once they are dead you can take the car and drive with ease. Also, if you damage the back end of the car to where the trunk pops open, you can see the dead body inside.
Better and quicker stopping:
When you are going very fast and you hit the handbrake, you will most likely spin out of control. To stop this from happening, hit reverse and the handbrake at the same time when you are trying to stop and high speeds. Doing this will stop you quicker, and eliminate any spinning.