Full list of all 46 Forza Horizon 2 achievements worth 1,000 gamerscore. It takes around 60-80 hours to unlock all of the achievements on Xbox 360.
You took part in 200 Multiplayer Events
You completed 100 Playground Games
You earned the Gold Wristband
You completed 25 Online Road Trip Locations
You took part in 20 Multiplayer Events
You earned every Sponsorship Bonus on offer
You mastered every Event at the Horizon Festival
You mastered all of the Events at 3 Destinations
You and your friends completed 25 Bucket List Stunts together
Mission accomplished! You completed the Bucket List
You earned 109 Skill Points
You joined an Online Freeroam with a friend
Your garage is worth over 20 million credits
You mastered all of the Events at 1 Destination
You joined a Car Club
You earned the Bronze Wristband
You earned a total of 1,000,000 Cr from Rivals
Your garage contains 50 cars
You drove down every road in the game
You collected 3 bounties
You beat them all to become Horizon Champion
You completed all 3 Road Trips
You completed 10 Bucket List Stunts
20 different Speed Cameras caught you doing over 100mph
You earned the Purple Wristband
You made it to Montellino
You completed your first Online Road Trip Location
You mastered your first Championship Event
You beat the train in a Horizon Showcase Event
You restored 5 Barn Finds
You made it to Saint Martin
You completed the Amateur Road Trip
You made it to Nice Massena
Nice driving. You earned the Clean Racer Skill 100 times
You earned your first sponsorship bonus
You bought your first car
You found and smashed every Reward Board
You earned 10 Skill Points
You smashed 25 Reward Boards
You earned the Blue Wristband
You made it to Sisteron
You made it to San Giovanni
You made it to Castelletto
You won your first race
You earned the Yellow Wristband
You arrive at the Horizon Festival in style