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