xbox 360-Forza Motorsport 2

Change any 2WD car into 4WD
Wear out your tires, then do a burnout in your highest gear. Once the RPMs are in the red, downshift into first (i.e. one downshift will put it into first). Keep the brake on during this. If done correctly, you will have all wheel drive.
Infinite money
Note: This trick will only work if your game has not been patched through Xbox Live. Select any car. Buy the upgrade second to the last. After buying it, reinstall the stock part, and there should be a blue check on the purchased part. Go to it, then press RT + X as you are selling the part you just purchased. It should move over to the one on the end. You will receive the money for the one on the end, and the one that you purchased should still be there. You can repeat this as many times as desired. Note: If you have already bought the best upgrade, this glitch will not work; instead, it will sell the best upgraded for the sell price.
Easy money
Level up any five Porsches (even the R class). If you still have the Chrysler ME-Four Twelve, select it, then go to "Upgrades" and "Tires". Select the Perrell tires, and they should be 50% off, costing about 17,000 CR. Buy them, then sell them for 21,000 CR.
Easy Endurance race wins
Go to any Endurance race, and enter it. Hire the cheapest driver, then go to the difficulty settings. Change each setting so that it will give you a bonus, except for the difficulty of the AI drivers. Change the AI to easy and begin the race. All you have to do now is wait.
Amateur Race Series reward cars
Get first place in the indicated race in the Amateur Race Series to unlock the corresponding car:
#22 3R-Racing Viper Competition Coupe: 5X5 V10 Super Sprint
1973 Porsche 911 Carrera RS: Sports Car Classic
1992 Toyota Do-Luck Supra: Boosted Shootout
2000 Acura VIS Racing Integra Type-R: Inline 4 Showcase
2002 Chevrolet Lingenfelter 427 Corvette: Big Block Shootout
2002 Nissan Tommy Kaira Skyline GT-R R34: 6-Cylinder Showoff
Corvette Goldstrand Edition: American Iron Runoff
ME Four-Twelve Concept: Extreme Performance Shoot-Out
Mugen S2000: Free-Breathing Challenge
VeilSide Supra Fortune 99: 20th Century Supercar Invitational
Asia reward cars
Reach the indicated level in Asia to unlock the corresponding car:
1969 Nissan Fairlady Z 432R: Level 5
1998 Nissan #32 NISSAN R390 GTI: Level 45
1998 Subaru Impreza 22B STi: Level 15
1999 Toyota #3 Toyota Motorsports GT-ONE TS020: Level 50
2002 Mazda RX-7 Spirit R Type-A: Level 25
2002 Nissan Skyline GT-R V-Spec II Nur: Level 20
2003 Subaru #77 CUSCO SUBARU ADVAN IMPREZA: Level 35
2004 Mitsubishi Lancer Evolution VIII MR: Level 10
2005 Honda NSX-R GT: Level 30
2006 Toyota #25 ECLIPSE ADVAN SUPRA: Level 40
Europe reward cars
Reach the indicated level in Europe to unlock the corresponding car:
1961 Jaguar E-type S1: Level 5
1974 Lancia Stratos HF Stradale: Level 10
1982 Porsche 911 Turbo 3.3: Level 15
1987 Porsche 959: Level 25
1989 Lotus Carlton: Level 20
1998 Ferrari F355 Challenge: Level 30
2005 BMW Motorsport #2 BMW Motorsport M3-GTR: Level 40
2005 Porsche #3 Lechner Racing School Team 1 911 GT3 Cup: Level 35
Audi #1 Infineon Audi R8: Level 50
McLaren #41 Team McLaren F1 GTR: Level 45
Manufacturer Club Series reward cars
Get first place in the indicated race in the Manufacturer Club Series to unlock the corresponding car:
1967 Ferrari 330 P4: Club Ferrari
1995 Toyota VIS Racing MR2 Turbo T-bar: MR2 Cup
1999 Lamborghini Diablo GTR: Running of the Bulls
2000 Audi AWE S4 Tuning Silver Bullet S4: Audi Cup
2000 Dodge Hennessey Viper 800TT: Viper Performance Cup
2000 Nissan Top Secret D1-Spec S15: Nissan Racing Club
2002 Honda Mugen Integra Type-R: Integra Cup
2003 Volkswagen Golf R32: Volkswagen Driver's Club
2005 Chevrolet #99 Tiger Racing Corvette Z06: Corvette Touring Cup
2006 Porsche #82 Red Bull 911 GT3 Cup: Porsche Sports Car Club
North America reward cars
Reach the indicated level in North America to unlock the corresponding car:
1968 Shelby Mustang GT-500KR: Level 5
1969 Dodge Charger R/T-SE: Level 10
1970 Chevrolet Chevelle SS-454: Level 15
1996 Chevrolet Corvette Grand Sport: Level 25
1999 Dodge Viper GTS ACR:Level 30
2000 Ford Mustang Cobra R: Level 20
2002 Cadillac #6 Team Cadillac NorthStar LMP-02: Level 50
2002 Saleen #11 Graham Nash Motorsport S7R: Level 45
2005 Chevrolet #31 Whelen Enigneering Corvette Z06: Level 35
2005 Panoz #51 JML Team Panoz Esperante GTLM: Level 40
Proving Grounds Series reward cars
Get first place in the indicated race in the Proving Grounds Series to unlock the corresponding car:
1969 Chevrolet Camaro Z28: North American Open
1970 Porsche 914/6: European Open
1985 Toyota AE86 Sprinter Trueno: Asian Open
1992 Lancia Delta Integrale EVO: RWD Shootout
1994 Honda Do-Luck NSX: Flyweight Invitational
1995 Toyota Border MR2 Turbo T-bar: Mid-Engine Challenge
2001 Mazda Mazdaspeed Roadster: FWD Shootout
2003 Renault Sport Clio V6 RS: Hot Hatch Runoff
2004 Honda Wings West Civic Si: AWD Shootout
2007 Shelby GT500: Heavyweight Open
Semi-Pro Series reward cars
Get first place in the indicated race in the Semi-Pro Series to unlock the corresponding car:
1995 Mazda AB Flug RX-7: Kumho 250HP
1998 Nissan R390: Nissan 350HP
1998 Subaru Tommy Kaira Impreza M20b: Goodyear 150HP
2003 Dodge #23 Viper Comp Coupe: Stoptech 400HP
2003 Mitsubishi Sparco Lancer Evo VIII: Sparco 200HP
2004 Volvo #24 At-Speed S60-R: Toyo 450HP
2005 Maserati #35 Risi Comp MC12: Risi Comp 600HP
2006 Audi #2 FSI Champion Racing R8: K&N 700HP
2006 Panoz #81 Team LNT Esperante GTLM: Panoz 500HP
2007 Peugot 207 Super 2000: Castrol 300HP
Achievements
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
All Time Trials Set (40 points): Beat the target time in every Time Trial race.
All Bronze Arcade (15 points): Achieve a bronze medal in every Arcade Race.
All Silver Arcade (25 points): Achieve a silver medal in every Arcade Race.
All Gold Arcade (35 points): Achieve a gold medal in every Arcade Race.
Flawless Lap (5 points): Awarded to the driver(s) who finish a lap with no time penalty against an opponent.
Flawless Race (5 points): Awarded to the driver(s) who finish the race with no time penalty against an opponent.
Natural (5 points): Awarded to the single driver who wins the race with all Assists turned off.
Hardcore (5 points): Awarded to the single driver who wins the race with full Difficulty, including no Assists.
Underdog (5 points): Awarded to the driver who wins the race with a car in the lowest PI of the field.
Blowout (5 points): Awarded to the driver who wins the race, beating the rest of the field by a full race section.
Crushing Victory (5 points): Awarded to any driver who finishes the race with a lapped opponent.
Hard Charger (5 points): Awarded to the driver who starts in 8th place and comes in 1st place.
Level 1 (5 points): Reach Level 1 in Career mode.
All Gold (Proving Grounds) (15 points): Achieve a gold medal in every Career event of the Proving Grounds Race Type.
Level 10 (15 points): Reach Level 10 in Career mode.
All Gold (Manufacturer Club) (20 points): Achieve a gold medal in every Career event of the Manufacturer Race Type.
Level 20 (20 points): Reach Level 20 in Career mode.
All Gold (Amateur Cup) (25 points): Achieve a gold medal in every Career event of the Amateur Race Type.
All Gold (Rivalry Face-offs) (30 points): Achieve a gold medal in every Career event of the Rivalry Race Type.
Level 30 (30 points): Reach Level 30 in Career mode.
All Gold (Semi-Pro Events) (35 points): Achieve a gold medal in every Career event of the Semi-Pro Race Type.
All Gold (Factory-Spec) (40 points): Achieve a gold medal in every Career event of the Pro Spec Race Type.
Level 40 (40 points): Reach Level 40 in Career mode.
All Gold (Regional Championship) (50 points): Achieve a gold medal in every Career event of the Regional Championship.
All Gold (Professional Series) (60 points): Achieve a gold medal in every Career event of the Pro Series Race Type.
All Gold (Endurance) (70 points): Achieve a gold medal in every Career event of the Endurance Race Type.
Level 50 (50 points): Reach Level 50 in Career mode.
All Gold All Race Types (75 points): Achieve a gold medal in every Career Race Type.
Car Level 5 (5 points): Achieve a car level of 5 in Career mode.
All Cars from France (1 points): Collect all of the cars from France in your Career garage.
All Cars from Germany (15 points): Collect all of the cars from Germany in your Career garage.
All Cars from Italy (10 points): Collect all of the cars from Italy in your Career garage.
All Cars from Japan (30 points): Collect all of the cars from Japan in your Career garage.
All Cars from Korea (1 points): Collect all of the cars from Korea in your Career garage.
All Cars from Spain (1 points): Collect all of the cars from Spain in your Career garage.
All Cars from Sweden (2 points): Collect all of the cars from Sweden in your Career garage.
All Cars from the United Kingdom (5 points): Collect all of the cars from the United Kingdom in your Career garage.
All Cars from the United States (25 points): Collect all of the cars from the United States in your Career garage.
1,000,000 Online Credits (30 points): Earn 1,000,000 "Online Credits" from Tournaments and Career races.
Car Broker (20 points): Buy or sell 10 cars online in the Auction House.
Additionally, there are four secret achievements:
Secret Collector 1 (30 points): Collect all production cars.
Secret Collector 2 (30 points): Collect all tuner cars.
Secret Collector 3 (30 points): Collect all race cars.
Secret Collector 4 (30 points): Collect all cars, including tuners and race cars.