Full list of all 45 Need for Speed achievements worth 2,200 gamerscore. It takes around 20-25 hours to unlock all of the achievements in the base game.
The base game contains 30 achievements worth 1,000 Gamerscore, and there are 5 DLC packs containing 15 achievements worth 1,200 Gamerscore.
You equipped top end performance parts to all categories on a car
You've become a Speed Icon
You've become a Build Icon
You've met the legendary builder Nakai-San
You've beaten Magnus' personal challenge
You've reached REP Level 50
You filled all the spots in your garage
You've become an Outlaw Icon
You've reached the top with your crew
You tuned a car to max drift or grip settings
You maxed out all 5 scoring styles in a single moment
You've become a Style Icon
You've uncovered the truth about the Outlaw
You've completed a single-take of Ken's Gymkhana
You've climbed aboard the drift train!
You got called out by other racers 50 times for your skills
You have beaten the Outlaw's "2 roadblocks in a pursuit" challenge
You've reached REP Level 25
You've learned to drive with style
You've found yourself a crew
You've beaten Magnus' record time
You purchased another car for your garage
You competed against Amy's high horsepower contacts
You won three events in a row
You've reached REP Level 10
You've won an event with a tuned car
You've taken your first snapshot
Acquired your spot in the garage
Become the Ultimate Icon
Complete 15 daily challenges
You put Ken's or Morohoshi's car in your garage
Win events driving Ken's and Morohoshi's cars
Get a 350000 Drift Score in Mental Block with Ken's car
Reach REP Level 70
Complete Eddie's Challenge
Win an event in Eddie's Car
Share a Wrap with the Need for Speed™ Community
Reach Monthly Rank 10 by Completing Daily Challenges
Take a Snapshot with a Filter in Snapshot Pro Mode
You downloaded a shared wrap
You bought your first Hot Rod
Win five Drag Race events
Win all the Prestige events
Win Gold on all Prestige events
Win all the events in a Speedlist