Global License
Description: unlock the Global License

How to: You have to acquire each of the other regional licenses in the game. Now, earn a million Global Points to unlock the Global License. All other not yet acquired licenses will be automatically acquired when you do.

All Drift Cars
Description: unlock all of the drift cars in the game automatically

How to unlock: insert TUN58396 into the in-game cheats menu.

All Muscle Cars
Description: unlock all of the muscle cars in the game automatically

How to unlock: insert MUS59279 into the in-game cheats menu.

Liveries
Description: unlock the liveries listed below, insert the cheat code password given into the in-game cheats menu:

Buchbinder 320si	F93857372
Gamestation BMW 320si	G29782655
Micromania Pagani Zonda R	M38572343
Play.com Aston Martin DBR9	P47203845

Ninja Difficulty
An elite difficulty level called Ninja is available for selection in the game once you have won every trophy and successfully completed each head-to-head race. Sounds easy huh? right!

All Cheats
Although all of the cheats are listed here already, they can be unlocked for selection automatically when certain conditions are met in-game. First, you must achieve a first place finish in all of the global events, which will bring you to one last head-to-head race. After winning that race, all of the cheats will be unlocked in the same place where the cheats are otherwise inserted in the game.

Unlock Bonus Livery Cars (GRID PS3)
[Submitted by: Toebin ]
Description: Unlock Bonus car PAGANI ZONDA Micromania Livery
How To:From the main GRID menu go to Options > Bonus Codes > Enter Code M38572343

Description: Unlock Bonus car Aston Martin DBR9 play.com Livery
How To:From the main GRID menu go to Options > Bonus Codes > Enter Code P47203845

Description: Unlock Bonus car BMW 320si Buchbinder Livery
How To:From the main GRID menu go to Options > Bonus Codes > Enter Code F93857372

Description: Unlock Bonus car WTCC Spec BMW 320si Gamestation Livery
How To:From the main GRID menu go to Options > Bonus Codes > Enter Code G29782655