They are as follows -  

Airborne (15 points)
Get the car airborne for 3 seconds

Stick Shift (10 points)
Win a race using manual transmission

You Again? (20 points)
Lap an opponent in a 12 car GRID World race

Sunday Drivers (30 points)
Finish a race at least one lap ahead of the rest of the field in GRID World

Hard Charger (20 points)
Win a 12 car race starting from the back of the Grid

City Slicker (20 points)
Race in every city

Road Block (10 points)
Be involved in a 10 car pile-up

1-2 Win (25 points)
Get a 2-1 at International Level

Combo King (20 points)
Get a x50 Drift Multiplayer

Keep Drifting (10 points)
Drift your car for 5 seconds

Keep Rolling (10 points)
Roll your car twenty times

Speed Demon (10 points)
Reach 200mph in any car in a GRID World race

Spin & Win (10 points)
Complete a 360º spin and still win the race

Gentleman Driver (30 points)
Win an entire GRID World Event without making contact with other cars

Back To Front (10 points)
Cross the finish line in first place in reverse

Corporate Power (10 points)
Fill all your sponsor slots

First Wheels (5 points)
Buy your first car

Gotta Drive 'Em All (30 points)
Drive every car

Winning Streak (25 points)
Win every race in an Event

Team Win (20 points)
Take your team to win its first Event

First Win! (10 points)
Win your first race

Seasoned Pro (30 points)
Win all Event Trophies

Hot Lap (20 points)
Set a lap record on any track

Globe Hopper (30 points)
Race at every location

Driver for Hire (10 points)
Race for a team from every region

Le Mans Legend (50 points)
Win a Le Mans 24 Hour race on Pro Mode.

Hire & Fire (10 points)
Hire a new teammate with a higher rank than your current one

Le Mans Rookie (15 points)
Complete your first Le Mans 24 hour race

When Will I Be Famous? (20 points)
Get onto a Hall of Fame Leaderboard

First Xbox Live Win (10 points)
Win your first ranked Xbox Live race

Five Xbox Live Wins (30 points)
Win 5 ranked Xbox Live races

Short Haul (30 points)
Drive a total of 500 miles

Long Haul (40 points)
Drive a total of 1000 miles

High Mileage (30 points)
Drive 750 miles in a single car

Top of the Tree (35 points)
Top the Driver Leaderboard

Top Team (35 points)
Top the Team Leaderboard

Filthy Rich (25 points)
Earn enough to buy a brand new Lamborgini Murcielago GTR

Power Seller (25 points)
Sell a car for more than you paid for it

Beat Codies (30 points)
Beat the developer or anyone who has beaten the developer online

Head 2 Head (30 points)
Win your first Head 2 Head race

Last Man Standing (20 points)
Be the last survivor of a single player Destruction Derby

Touge King (20 points)
Win a Touge Event on a 5 star difficulty level

Car Wreck (5 points)
Cause Insane damage to your car

Flashback & Win (5 points)
Use the Flashback feature and win the race

Full Rep (10 points)
Earn the full Reputation available in a race

Online Legend (30 points)
Reach the Rank of Legend in Xbox Live races

Global License (20 points)
Unlock Global License

Online Elite (20 points)
Reach Elite Ranking in Xbox Live race

Record Breaker (10 points)
Complete a lap of Okatama Grand Circuit in under 90 seconds

New Kid on the Block (5 points)
Complete your first race

Source