Here is the full list of all 47 DiRT 2 achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
Earn those big bucks.
Win every event in the DiRT Tour.
Drive every vehicle in the game.
Win a DiRT Tour event without winning a race.
Roll your vehicle and still win the race.
Finish with Flair! Cross the finish line with no more than two wheels touching the ground.
Win a DiRT Tour race without crashing.
Take terminal damage while travelling at over 140mph (225km/h).
Win an event.
Win a race at every track in the game (in any game mode).
Win a domination event, getting the maximum available points.
Win a Timed Throwdown.
Be second to last at each elimination point but go on to win a Last Man Standing race.
Hit every gate in a Gatecrasher event.
Become true friends with a superstar.
Become true friends with 4 superstars.
Become true friends with every superstar.
Race in your first DiRT Tour race.
Win a Pro division event.
Win an All-Star division event.
Win a Throwdown.
Win 12 Throwdowns.
Reach Level 15 in the DiRT Tour.
Reach Level 30 in the DiRT Tour.
Beat Travis Pastrana in a Throwdown.
Beat Ken Block in a Throwdown.
Compete in a race in every location.
Win all the World Tour events.
Win all the X Games events.
[SECRET]
Win 5 Pro Tour races over Xbox LIVE.
Take part in four tournaments.
Reach Online Fame Level 15.
Reach Online Fame Level 30.
Win an Xbox LIVE Pro Tour race against 7 competitors.
Play in every discipline over Xbox LIVE (Pro Tour or Jam Session).
Win 25 Rally races in the DiRT Tour.
Achieve a 'Cautious' impact rating in Multiplayer races (Pro Tour or Jam Session).
Beat Dave Mirra in a Throwdown.
Choose a ghost, download and beat it!
Win a race using a custom vehicle setup.
Win two team events with the same female team-mate.
Win X Games Europe.
Win X Games Asia.
Win X Games America.
Bask in your success at X Games America.