How to Unlock All Muscle Cars:In the in-game cheats menu, unlock all muscle cars by entering MUS59279.
Unlock Liveries:
You can unlock Gamestation BMW 320si and Buchbinder 320si by entering F93857372 in the in-game cheats menu. Unlock the Aston Martin by entering P47203845. Unlock the Micromania Pagani Zonda R by entering the code M38572343.
Unlock All Drift Cars:
Inside the in-game cheat codes menu, you can unlock all drift cars by entering TUN58396.
And always remember that you need to have at least $40,000 before you can start your own team and test drive the cars.
Bonuses for Completion:
If you get all 51 trophies and complete the game you can unlock all of the game cheats as well as the secret cars. This will also unlock a one-on-one race with Ravenwest of three laps at Circuit de la Sarthe that has to be done on extreme difficulty. Winning this race will get you $20 million dollars along with bonus cars so you can have up to 47 cars in the garage. If you complete the head to head races you will also be able to unlock Ninja difficulty. Winning all the regional licenses along with 1 million Global points will get you a Global license as well as any other license that hasn’t yet been unlocked. You can also unlock the GRID Gamerpic if you lead the team and driver leaderboards.
Reward: Action:
30pts Win all event trophies
20pts Set a track record
30pts Race at all locations
10pts Race for a different team in each region
50pts Win a 24 hour race on Pro Mode
20pts Get on a Hall of Fame leaderboard
30pts Drive 500 miles
40pts Drive 1,000 miles
30pts Drive 750 miles in one car
35pts Get on top of the driver leaderboard
35pts Get on top of the team leaderboard
10pts Hire a teammate that ranks higher than you
15pts Complete the first Le Mans rance
25pts Earn enough to purchase a Lamborgini Murcielago GTR
25pts Sell a car for more than you bought it for
30pts Beat the developer or anyone else who has beaten the developer
30pts First win at a head to head race
20pts Win a destruction derby
20pts Win a Touge event on 5 star difficulty
30pts Drive all cars
25pts Win every event race
20pts Lead to a first team win
10pts First race win
15 pts Car airborne for 3 seconds
5pts Cause maximum car damage
5pts Use flashback to win the race
10pts Earn full race reputation
20pts Unlock Global license
5pts Complete first race
10pts Get involved in a 10 car
pile-up
25pts Get a 2-1 at international level
20pts Get a x50 multiplayer drift
10pts Drift for 5 seconds
10pts Roll car twenty times
10pts Reach 200mph in a grid world race
10pts Do a 360 spin and still win the race
30pts Win an event without touching other cars
10pts Win the race with the car in reverse
10pts Fill all sponsor slots
5pts Purchase your first car
10 pts Win race using manual transmission
20pts In a 12 car grid world race, lap an opponent
30pts In grid world, finish one lap ahead of the field
20pts Win a 12 car race from the back
20pts Race in all cities
Video by CodeMasters:
