Project Gotham Racing 4 Cheats

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Winning Streak (30 points): Win 3 race events back to back in either Arcade or Single Player Career Mode.
1-2 Finish (10 points): Complete a Ranked Match Team Championship with your team taking the top two positions.
Team Domination (20 points): Complete a Ranked Match Team Championship with your team taking up the top four positions.
Team Leader (10 points): Earn the most points for your team in a Ranked Match Team Championship.
Showboater (20 points): Earn 9000 Kudos in a single race.
5-Star Racer (20 points): Earn 5 Kudos Stars.
Superstar (40 points): Earn 5 Kudos Stars three times in a race.
Mind Your Manners (25 points): Win a Street Race in Arcade or Gotham Career mode without making contact with walls.
The Unicyclist (20 points): Perform a long Wheelie on a motorcycle.
Bibendum (10 points): Play all 3 Test Track disciplines and set a score in each one.
Weather Master (25 points): Win races in rain, fog, and snow in either Arcade or Single Player Career modes.
Winner (5 points): Win your first event in either Arcade or Single Player Career modes.
Silver Gotham Arcader (40 points): Earn a Silver medal in every Arcade event.
Gold Gotham Arcader (10 points): Earn a Gold medal in every Arcade event.
Platinum Gotham Arcader (10 points): Earn a Platinum medal in every Arcade event.
Silver Double (30 points): Earn at least a Silver medal with both a bike and a car in any Arcade event.
Gold Double (5 points): Earn at least a Gold medal with both a bike and a car in any Arcade event.
Platinum Double (5 points): Earn at least a Platinum medal with both a bike and a car in any Arcade event.
Arcade Chapter Complete (30 points): Complete any chapter in Arcade mode.
Professional (70 points): Reach the rank of Professional in Single Player Career mode.
Hotshot (70 points): Reach the rank of Hotshot in Single Player Career mode.
Master (40 points): Reach the rank of Master in Single Player Career mode.
Hero (20 points): Become a National Champion in Single Player Career mode.
Champion (10 points): Win your first Championship in either Single Player Career or Ranked Match play.
Motorcycle Ace (25 points): Win a Single Player Career Championship on a motorcycle.
Major Winner (40 points): Win a Major in Single Player Career mode.
Dominator (20 points): Win all three Single Player Career Majors.
Stuntman (5 points): Perform your first stunt on a bike.
Buy an Achievement (20 points): Buy the K1,000,000 gamer picture to earn this Achievement.
Back it Up! (10 points): In a split-screen Street Race, finish 1st and 2nd in reverse gear against at least one AI opponent.
Strike a Pose (10 points): Get two bikes facing each other, 15 metres apart, with each performing an impressive endo.
First Timer (10 points): Complete your first Ranked Match Championship.
8th Wonder of the World (20 points): Complete a lap of the Michelin Test Track 'figure of 8' while sliding.
Catch 'Em All (5 points): Swap paint with every opponent in an eight vehicle race.
Endo King (20 points): Earn 100 Kudos by performing an Endo with a motorcycle.
Seat of your Pants (25 points): Complete a Hot Lap event in Arcade mode without touching your brake.
Rubbin' is Racin' (20 points): Knock off the wing mirrors on all of your opponents' vehicles in a Single Player Street Race event.
Show Jump (10 points): Get eight vehicles in the air at the same time.
I Love PGR (5 points): Buy everything in the PGR Shop or complete PGR 3 and get to Rank #1.
Whitewash (50 points): Win every event in a Single Player or Ranked Match Championship.
You Won't Believe Your Eyes! (5 points): Create a 3D image using Photo Mode.
Secret Agent (5 points): Solve Puzzle #2.
3CZV657 (5 points): Solve Puzzle #1.
Tonight Make Me Unstoppable (5 points): Solve Puzzle #3.
Play It Again Sam (20 points): Improve on a medal earned in any arcade event.
PGR On Demand - Photo (5 points): Upload a photo and vote on a photo in PGR On Demand.
PGR On Demand - Video (5 points): Upload a replay and vote on a replay using PGR On Demand.
Giant Killer (20 points): Win against a human opponent with Rank 1 single player status on Xbox LIVE.
Numero Uno (50 points): Reach Rank Number One on the Single Player Career Drivers' Leaderboard.
Beat Bizarre (10 points): Defeat a PGR 4 team member on Xbox LIVE, or defeat anyone who's bested a PGR 4 team member.

Additionally, the following achievements are available with the bonus downloadable content:

Tourist Kudos King (15 points): Earn more kudos than anyone else in a Tourist event.
Open Cat Champion (15 points): Be a cat on the winning team in a Cat and Mouse Open Event.
Open Mouse Master (15 points): Be a mouse on the winning team in a Cat and Mouse Open Event.
Platinum Plus (60 points): Get all the platinums in the Platinum Plus Challenge.
Download King (60 points): Complete the DLC Challenge chapter (at various difficulties).
Arcade Challenge (50 points): Complete the Arcade Challenge chapter.
Cheater (5 points): Activate one of the cheats in the cheat menu.
Make the Grade (10 points): Try to qualify for a tournament.
01 Yee Haw (10 points): Solve Puzzle #4.
Are You the One? (10 points): Solve Puzzle #5.