Acid Trip visuals  -  ozzysworld

Go to Options, then Codes. Then type: ''howhardcanitbe'' then any number from 0-9. 0 being the easiest, 9 being the hardest. Change Difficulty

Change Game Speed  -  Go to Options, then Codes. Then type: ''howfastcanitbe'' then any number from 0-9. 0 being the slowest, 9 being the fastest.

Guns & Rockets  -  Enter code "lovenotwar". To fire your rockets, press the Horn button. To fire the machine guns press High Beam button.
adamantium Invincibility

Unlimited Turbo in Arcade mode  -  Go to Options, then Codes. Then type in ''zoomzoom4'' and enter the arcade mode.

Unlock extra stat  -  Go to Options, then Codes and enter ''bigbrother''.

Cheat mode:  Highlight "Options Mode" at the main menu. Press Down to highlight "Options: <name>", then press Left or Right until "Options: Cheat Codes" appears. Press A. Then, enter one of the following case-sensitive cheat codes. Then, highlight "Accept" and press A. Note: Codes can also be set to the hotkeys by pressing R to avoid re-entering them repeatedly.
 
All locations:  Enter theworldismine as a case-sensitive code to unlock all locations in arcade mode.

All cars:  Enter hotwired as a case-sensitive code to unlock all cars in arcade mode. Note: Your console may need Xbox Live! installed for this code to work.

All car abilities: Enter greasemonkey as a case-sensitive code.

Unlock "Most Dedicated" stat:  Enter bigbrother as a case-sensitive code.

Adjust game speed:  Enter one of the following case-sensitive codes to set the game speed. howfastcanitbe0 is the slowest setting, and howfastcanitbe9 is the fastest.

howfastcanitbe0
howfastcanitbe1
howfastcanitbe2
howfastcanitbe3
howfastcanitbe4
howfastcanitbe5
howfastcanitbe6
howfastcanitbe7
howfastcanitbe8
howfastcanitbe9

Adjust game difficulty:  Enter one of the following case-sensitive codes to set the game difficulty, by adjusting the "glue" system. howhardcanitbe0 is the easiest setting, and howhardcanitbe9 is the most difficult.

howhardcanitbe0
howhardcanitbe1
howhardcanitbe2
howhardcanitbe3
howhardcanitbe4
howhardcanitbe5
howhardcanitbe6
howhardcanitbe7
howhardcanitbe8
howhardcanitbe9

Motorcycle:  Defeat five motorcycles in a long race.

Los Angeles police car:  Win all the circuit races in Los Angeles in arcade mode.

Paris police car:  Win all the circuit races in Paris in arcade mode.

Tokyo police car:  Win all the circuit races in Tokyo in arcade mode.

SLF450X:  Win all the races in Los Angeles, Paris, and Tokyo in arcade mode and complete career mode to unlock the SLF450X. It is the fastest car in the game and can hit 250 mph with no boost. You can only use it in arcade mode.

Veloci:  Win all six of the World Champion's races (Savo).

Zoom on mini-map:  Press Down/Left or Down/Right to zoom in and out of the mini-map at the bottom left corner.

Quick start:  At the starting line when the countdown begins, hold R to peel out, and then move back and forth to sway the car. This will move you forward slightly, and will give you a better starting position.

Boost:  The Veloci and SLF450x vehicles have a boost option. Once you go over 60 mph, hold R to get a speed boost. Note: Handling will get difficult when this is done; using it on a straightaway may work best.

When riding the Cohete (motorcycle) and accelerating, briefly hold L to pop a wheelie. This will give you more acceleration/speed.

With any car, after you start to accelerate hold R and it will speed up your car.

After using a slipstream, press Nitrous quickly to go at least 180 mph.

More checkpoints for race editor:  Once you are in the race editor, press X and go left once until it "Opponents" or something similar appears. Change the number of opponents to 0 (none), then press B until you return to the race editor's main screen. You will now be able to put checkpoints on highways, freeways, subways, etc. They are the larger dots.

Los Angeles: Easy motorcycle win:  On the motorcycle level, the best strategy is to knock your opponents off their motorcycles by ramming into them. You can get a good start in the beginning of the race by doing the "burning rubber" strategy and moving to the left into two of the motorcycles and knocking them off.

Paris: Secret area:  Find the Cathedral. Once there, you will see the doors. They appear as if you cannot go through them. However, you can drive straight into them and they will open, allowing your car to go through.

Paris Big jump and backflip:  Go to Paris in cruise mode. Drive the Veloci for the best results. Go up the glass pyramid at the start. Use all your nitrous from the word go, in the air as well. Hold Analog-stick Back when you start to go up the jump. Most of the time you can land a backflip. This may take a few attempts. Try going up the jump in different directions.

Paris: Get on roof of building:  Use either a motorcycle or a very fast car. When the race starts, turn around and go into the tunnel behind you. Then, when the tunnel gets to the wide area with the pillars, turn around and nitro through the tunnel you just came from. Drive at full speed at the pyramid. When you hit the big pyramid, use a boost or a nitro to soar off and over the building after the pyramid that you hit. You should fly over the road behind the building and on top of the building on the other side of the street. You are now able to drive on rooftops.

Tokyo: Big jump:  Select cruise mode and follow your way through the glass rectangle about 50 meters in front of you. Drive straight until you get to the road up to the freeway. Go up onto the freeway and stay on the right-hand side. Take the first turnoff on the right. Follow that until it goes back down on the street. You should be next to a large river. Follow that river road until you reach a massive jump. You can use it and land on the other side of the river. Note: It is best to get a run up from down that small street with one of the best cars with some nitro.

360:  When going at least 130 mph and driving straight, hold Right or Left + Reverse to do a perfect 360.

Easy turning with motorcycles:  Hold L while driving and use the Analog-stick to make any type of turn. On straightaways, hold Up to duck down to prevent drag.

Powerslide:  Enable the "Unlimited nitrous" code. Get a motorcycle and begin arcade mode. Find a good straightaway and hold Weight Shift. When you are going fast use the brake and the nitrous at the same time. You will powerslide around faster. It is useful for 180 turns in races.

Wheelies and side burns:  While playing with any car or motorcycle, hold L and drive above 20 mph. Then, while holding down L, press the Left Analog-stick Left or Left Analog-stick Right with a car and they will turn on their left or right, enabling them to drive sideways. With a motorcycle, press Left Analog-stick Down and you will pop a wheelie. However, you can also press Forward and Forward/Left or Forward/Right to bend down more and be able to do tremendous turns.

If you have the Veloci, you can do a wheelie by going onto two wheels and pressing both brakes until you turn around. Then, press the gas to do a wheelie. Using nitro while doing the wheelie will help keep you in it.

Drive the 1971 Besetia. Rev up and do a wheelie, but instead of holding R, keep pressing that button to make it seem you have hydraulics.

On the Cohete in any mode, drive forward at any speed. Press Left-Analog stick Down then (while holding the throttle direction) hold Hand Brake + Weight Transfer. You will hold the bike up, while only moving a few mph. You can hold and maintain this wheelie as long as you hold those buttons and direction.

The best motorcycle to use to practice wheelies is the first one you unlock in career mode. This bike is most useful for going down straightaways on the highway on the Los Angeles level. If you use the fastest motorcycle instead of this bike, you will most likely fall off immediately.

Easy wheelies:  Get a motorcycle and do a wheelie for at least three seconds. Then, pull back all the way on the Analog-stick. If done correctly, you will be perfectly balanced.

Endo/Nosie/Front Hand Stand:  While riding a motorcycle, hold Weight Transfer and press the Left Analog-stick Forward. Apply the normal brakes. The bike will then balance on its front wheel.

Stoppie:  Get your speed above 40 mph, then hold L(weight transfer) and press the Left Analog-stick Up + X (Reverse).

One wheel 180:  While going about 100 mph or more on a motorcycle, pull a medium to high wheelie, press Analog-stick Down and do an endo. Press the Analog-stick Left or Right at the same time to do a front wheel 180 degree turn.

Barrel roll:  After you unlock the "Driving On Two Wheels" cheat, go to arcade mode and select "Cruise" and a fast car. Then, press the Weight Transfer + Left Analog-stick to get onto two wheels when on a long straight-a-way. Go down the straight-a-way and gain speed. When you reach a turn, use the handbrake to make an extremely sharp turn. If you gained enough speed and turned the correct way, you should have flipped over and landed back on your wheels. In order for this to work, you must take physics into consideration. If you go on your right side wheels, you must turn left to do a barrel roll and vice versa.

Front and back flips:  Win the first few Gina races to unlock the weight shifting ability. Then, go off of any big jump, hold L, and hold Analog-stick Forward or Away to do a flip. Cars that this can be done with are the Saikou, the Saikou XS, and the Victory. The best places to do them are in Paris. Try the glass pyramid into the street and off the big jump over the water after the red tube jump. The big jump is on the right-most side of your map and is a small gray rectangle.

Slip stream turbo:  Line up in the wake of the car ahead of you, watching air streams and listening for the draft noise. Stay in this sweet spot for a few moments until the meter fills up with red, and then press Nitro to slip ahead of your opponents. Note: You cannot use this until you defeat three people in career mode.

Losing the police:  When side by side with a police car, find a tree or pole ahead that is on the side nearest to the police car. Push the police car into the tree or pole.

When a police car is directly behind you, find a tree or pole ahead. Drive directly toward it and when near, take a sharp turn away from it. The police car will smash into the tree or pole.

Police car numbers:  When being chased by a cop, look at the top of their car. All the police cars numbers are 420.

Graffiti:  Look at some of the graffiti on the walls in Los Angeles to find some interesting things. Near a wall by the airport is graffiti that says "Vice City", referring to the fact that Rockstar made both Midnight Club 2 and Grand Theft Auto: Vice City. There is also saw a wall that had "Rockstar" on it.

Go to the dry trench in Los Angeles. You will see graffiti on the sloped part of the trench. You can find the names of other Rockstar games such as Grand Theft Auto: Vice City and M.C. (Midnight Club).

Easy wins in Capture The Flag mode:  Get the item, stop, and allow one of your opponents to get the flag. Then, go all the way to the finish line and stay there. When your opponent is racing down to the finish line, quickly use stop on his or her car. While stuck there, ram into their car, get the flag, and bring it to the finish line. Note: This trick may not work if not executed properly. Also. to avoid your opponent's attacks, get a shield or stealth.

Easy wins in Circuit races:  Enable the "Nitrous" and "Guns and rockets" codes. Use a motorcycle of your choice. At the beginning of the race, use the "Burnout" strategy and face a car in front of you. You can either use the machine gun to blow it up or use the rockets to move them out of your way. If they get past you in any part of the race, fire the machine gun and steer and accelerate and fire rockets to knock them off course.

Last Man Standing, The Final Race:  After you have completed the game and have become the Tokyo champion, another message appears. It reads "The World Champion Of Illegal Street Racing". However, you are not really the champion until you defeta Shave. He has all Velocis and they have five nitros. The best way to defeat him is to enable the "All cars" code. Red and yellow Velocis will attempt to run you off the road.

Repair damage and restore nitro:  When cruising in in career mode with damage and no nitro, find a racer and flash your lights at him. Do not follow him. Instead, either stay where you are or drive in the opposite direction. Ignore the countdown. Once out of time, your damage and nitro will be as if you just started the level.

Flip the finger:  Choose the motorcycle and go into any mode. Remain idle without moving. After about thirty seconds, the man on the bike will turn around and flip the finger.

Disturbing portapotty comment:  If you hit a portapotty, a man will say "Leave us alone".

When riding a motorcycle, crash into something that will make you fly off the bike. While you are still on the ground, pause the game then resume. Your rider will stay on the ground, but you will be able to drive the bike riderless, as long as you do not crash into anything too hard. You can even double back and push the rider around.

When on the Nousagi or any other bike, when your damage is full and the bike is going to explode, quickly press Start, then select "Continue". The bike will be indestructible, and the rider will be gone.