Here is the full list of all 50 The Crew Motorfest achievements.
Complete 20 Photo Ops
Spend 24 Hours in The Crew Motorfest
Own 30 Vehicles
Complete all three timelines on the Motorfest Main Stage
Spend 1 Million Bucks in one purchase
Complete 30 Challenges
Overtake 12 players in the Grand Race in the same session
Participate in a Grand Race event
Reach Level 15
Complete 6 Playlists
Perform 31 Different Motorfest Feats
Reach maximum level on one vehicle
Become a Motorfest Legend for the first time
Use up the rewind feature fully 1 time
Fly through the "Rule the Streets" inflatable donut with a plane
Complete 15 Motorfest Events
Complete all activities of a Summit Contest
Take 3 photos in the same session
Submit 1 vehicle to the Custom show
Complete a Summit Contest event
Complete a Playlist for the first time
Travel 40 Kilometers (25 miles) anywhere in Hawaii in the same session
Find and open a Treasure
Complete your Motorfest welcome for the first time
Use the fast travel feature for the first time
Win 5 custom events in the same session
Own a vehicle in 10 different vehicle categories
Chain a 15 actions combo with Dynamic Freestyle
Reach the summit of the volcano with a ground vehicle
Fly under 5 differents bridges in the same session
Stay still for 1 minute on the beach in front of the Royal Hawaiian Hotel
Fly as high as possible
Perform a donut move in the Ubisoft logo
Join, or form a Crew
Complete a custom event with a Crew of 4 players
Fully customize one vehicle (Visual parts and Livery)
Drive or Fly 5 Km in formation with a Crew member, in the same session
Participate in a Demolition Royale event
Destroy 3 vehicles in Demolition Royale in the same session
Vote for 5 cars in the Custom show in the same session
Complete 5 events in Main Stage Mode in the same session
Transform into a monster truck twice in a single game of demolition royale
Win by completing the event without hitting a wall, or track limits, driving in Ebisu Style
Complete a Speedtrap instance with a boat
Equip your avatar with the casual tuxedo and drive an Aston martin car
Try to leave Hawaii (boat or plane) by reaching the limit of the map
Reach 88 MPH (142 Km/h) with the Delorean DMC-12 and use the rewind feature
Stay in a Car meet car for 10 seconds or more
Perform a donut move around the pineapple shop
Chain two bike backflips while in the air and use fast fav with a plane, before reaching the ground