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