Create a race with all collectibles:
Enter the race editor and press start to go into the layout mode (overhead view). Then, press L1, L2, L3, R1, R3, and X to have the game create a race with a checkpoint on up to 30 collectibles you don't already have. Test the race to collect them all. Delete the checkpoints once you're done and do it again to find any remaining collectibles.
Rockstar Barrel Cheats:
Unlock the following cheats by collecting the corresponding amounts of hidden Rockstar Barrels. Note that enabling a cheat will stop your progress in Career mode and the earning of money and reputation in races:
CHEAT FUNCTION - BARRELS
Never Damage Out - 20 rockstar barrels
No Fines - 60 rockstar barrels
No Police - 50 rockstar barrels
Top Down View - 40 rockstar barrels
Unlimited Nitro - 10 rockstar barrels
Unlimited Special Abilities - 30 rockstar barrels
Unlock the following performance upgrades by reaching the corresponding ranks:
PERFORMANCE UPGRADE - RANK
Level 1, Group 1 Vehicles - Earn the "navigator" rank (800 reputation).
Level 1, Group 2 Vehicles - Earn the "driver" rank (5,600 reputation).
Level 1, Group 3 Vehicles - Earn the "elite racer" rank (13,700 reputation).
Level 1, Group 4 Vehicles - Earn the "savant" rank (22,760 reputation).
Level 2, Group 1 Vehicles - Earn the "rookie" rank (3,610 reputation).
Level 2, Group 2 Vehicles - Earn the "veteran" rank (10,760 reputation).
Level 2, Group 3 Vehicles - Earn the "legend" rank (19,540 reputation).
Level 2, Group 4 Vehicles - Earn the "hero" rank (26,160 reputation).
Unlockable Custom Items:
Unlock the following items for the vehicle class you race with by completing the corresponding amount of races:
ITEM - RACES
Blowers - 45 races
Car Headlights or Motorcycle Bowls - 36 races
Car Spoilers or Motorcycle Tails - 18 races
Car Stereos or Motorcycle Tanks - 27 races
Exhausts - 45 races
Front Bumpers - 9 races
Front Seats - 27 races
Hoods - 36 races
Intercoolers - 45 races
Post Gauges - 27 races
Rear Bumpers - 18 races
Skirts - 9 races
Steering Wheels - 27 races
Taillights - 36 races
Widebody Kits - 45 races
Unlockable Vehicle Groups:
Unlock the following vehicle groups by reaching the corresponding ranks:
VEHICLE GROUP - RANK
Group 2 vehicles - Earn the "student driver" rank (2,000 reputation).
Group 3 vehicles - Earn the "racer" rank (8,060 reputation).
Group 4 vehicles - Earn the "champion" rank (16,500 reputation).
To unlock infinite money, beat Career mode.
Karol Garage Partner mission:
To unlock the Karol Garage Partner mission, reach 'Idol' rank(33,500 reputation).
Hydraulics and air bags:
To unlock hydraulics and air bags for your online profile, join the Rockstar Social Club and link to your online profile. Complete 4 of the 12 driving test achievements.
Easy rank and money:
To get easy rank and money in Arcade mode, go to the options menu and disable power-ups, set traffic to 'none', and set the AI to 'Easy'.
Getting rid of police:
To get rid of police, after you finish a race enable the "No Police" cheat and then disable it. The police will disappear and you will keep your money and reputation.
Catch freeway racer:
When there is a red target far ahead on the map, enable the "Unlimited Nitro", and "No Damage" cheats to catch him. Then, disable the cheats just before you are about to race him to keep your reputation and money.
Easy highway battle wins:
Before starting a highway battle, build up speed while behind the opponent. While passing the car flash your lights to start the race. You will have a big head start.
Right before the race starts, do a burnout by pressing gas and engaging the e-brake. Release the e-brake when there are 3 or 4 bars left in the countdown timer. This will give you a big boost off of the line every time.
Go into the race editor and switch off drive and drop mode. Move the pointer to the desired location and turn drive and drop mode back on. When you exit the race editor you will be at the selected location.
Drive with open doors:
In the garage, modify your car. Go to the "Doors" selection to preview the door opening. Once it opens all the way, back out and then quickly press X as soon as the menu appears. Your doors should now be stuck wide open. They will close if you select some options, mainly the "Doors" modifications. When you leave the garage, your doors should still be stuck open, and you can drive around with them in this position.
Anger Management - Unlock level 3 agro.
Crossing the Line - Complete 50 races online.
Everyone's a Critic - Rate 25 rides online.
Father Time - Completely unlock a time trial by completing all 3 missions.
Getting Off the Bench - Enter an online cruise and join a proposed race.
Go on Green - Win 15 red light races.
Hear me Roar! - Unlock level 3 roar.
Jordan Jumpman - Spend more than 10 minutes in the air. Brought to you by jordan brand.
Mild Dedication - In goal attack, complete every goal for one race.
Neither Bird nor Plane - Travel 1020 feet in a single jump.
Out On Bail - Evade the police successfully when they are in pursuit.
Paparazzi - Save 16 photos to your photo album.
Saving Los Angeles - Enter the race editor, create a race, and then save it.
Set To Stun - Unlock level 3 EMP.
Streaker - Win 5 races in a row offline.
T-Mobile myFaves - Join an online game with 5 of your friends. Stay connected with myfaves from t-mobile.
The Basics - Complete one of the missions you receive in the mission log.
Turn in the Work - Submit a vehicle to rate my ride.
Uncle Time - Finish the first mission for each of the 4 time trials.
Wanted Man - Pull over while the police are in 'pull over' mode, then drive away during the ticketing cutscene.
What's a Speed Limit? - Win 15 dynamic freeway races.
Where in the World? - Find half of the collectables in los angeles.
Who Made This? - Enter a race editor race online.
Winning With Less - Win 10 races on a motorcycle.
Zoning Out - Unlock level 3 zone.
Competitive Glory - Win each of the 4 tournaments at least one time.
Destroyer of Worlds - Successfully destroy 15 opponent vehicles using the payback vehicle at the beaches garage.
Have Car, Will Travel - Drive a total of 5,000 miles, including any miles driven online or offline.
Here for a Pickup - Successfully deliver 15 vehicles out of the hollywood garage.
How Exotic - Beat the exotic champ.
In the Lap of - Beat the luxury champ.
It's How You Play The Game - Finish 300 offline races. Winning is not required.
Just Get A Motorcycle - In a car, drive a cumulative total of 50 miles on 2 wheels.
Master Thief - Steal 80 flags while playing capture the flag or other battle matches.
Name that Tuner - Beat the tuner champ.
Postman - Deliver 100 flags in capture the flag or other battle matches.
Rags To Riches - Have $1 million dollars in the bank while playing in los angeles.
Ranking Up - Win 20 tiered matches online.
Retire the Master - Beat the city champ.
The Winner - Win 180 offline races.
Two Wheels of Fury - Beat the motorcycle champ.
Unicycle - Drive a cumulative total of 50 miles while doing a wheelie on a motorcycle.
Waldo's Still Missing - Find all the collectables in los angeles.
World's Strongest - Beat the muscle champ.
True Dedication - All goal attacks must be unlocked and every goal for every race completed.
The Completist! - Earn all Bronze, Silver, and Gold trophies.
"South Central" trophies:
Big Ballin' - Win 10 races in an SUV.
Brother Time - Complete the 3 missions for the South Central time trial.
Easier than the Hills - Complete the South Central tournament.
Goin' South - Meet the South Central Mechanic.
Low Ballin' - Win 10 races in a Low Rider.
Money for nothing - Complete the South Central Wager Mission.
Sign Here - Complete 10 deliveries in South Central.
South Central Test Drive - Take 1 South Central vehicle out for a test drive.
Been there, Done That - Finish the South Central career.
GOOOOAAAAAALLLLL!!!!! - Finish all South Central Goal Attacks.