Here is the full list of all 50 Blur achievements worth 1,000 gamerscore. It takes around 40-50 hours to unlock all of the achievements on Xbox 360.
Earn your first Fan Target
Wreck your first car
Complete your first Fan Run
Evade or destroy your first incoming Power-up
Unlock Shannon's One-on-One
Beat Shannon in her One-on-One
Wreck your first Rival in a One-on-One
Earn every Primary Light on Hard difficulty
Complete everything in the singleplayer game
Master Destruction events
Master the Shield Power-up
Hit set speeds in class A, B, C and D cars
Master the Bolt Power-up
Master Fan Demands
Explore Blur's locations
Unlock Legend Mode
Master the Shunt Power-up
Master the Mine Power-up
Master the Nitro Power-up
Master the Repair Power-up
Master the Blur Challenges
Master Fan Runs
Master Checkpoint events
Show that you can bring the fight to One-on-Ones
Master the Shock Power-up
Beat Shannon again in her One-on-One
Beat Carver in his One-on-One
Master Race events
Earn all Primary Lights in M.Haruna Checkpoint without damaging your car
Beat the twins in their One-on-One
Beat Talon in his One-on-One
Prove yourself by completing Rival Demands in career
Earn the Motor Mash sticker
Win a race in multiple playlists
Master the Barge Power-up
Beat Natalya in her One-on-One
Beat Drayke in his One-on-One
Race at each location in the game
Beat Rhymer in his One-on-One
Win a race in 4 player Split Screen
Beat a Rank 50 player
Have a complete experience of Friend Challenges
Win a race using a custom mod setup
Stand out from the crowd with car resprays
Beat Khan in his One-on-One
Choose any Friend as a Rival from the Single Player Leaderboards
Finish a race 0.1 seconds or less ahead of another player online
Wreck a Blur developer on Xbox LIVE, or anyone with this Achievement
Become an Award-winning racer
Share your first Blur experience on Facebook, Twitter or Xbox LIVE