Here is the full list of all 15 Driftwood achievements.
Complete the Tutorial
Make it to the end of Eagle Stone Mountain
Finish the tutorial level in under 50 seconds
Complete all milestones and challenges
Wear the Suit Top and Suit Pants together
Break 10 delineators in the map
Reach 100 km/h with the Sticks of Butter "wheels"
Start the tutorial with Sticks of Butter as wheels
Crash for the first time
Crash 10 times
Crash 50 times
Crash 100 times