Here is the full list of all 28 Adrenalin Misfits (EU/JP) achievements worth 1,000 gamerscore.
Finish a "Balloon Buster" race with Rank A.
Finish a "Trick Score" race with Rank A.
Finish a "Downhill Slalom" race with Rank A.
Finish a "Free Race" race with Rank A.
Finish a "Fly Distance" race with Rank A.
Get a star in a race while performing an air trick.
Get big air in a race.
Crash hard into another player.
Perform a switch riding while jibbing.
Finish a race in 1st and 2nd place with a friend.
Win a multiplayer challenge.
Twist your body while in the air and perform at least 3 air tricks.
Perform an air trick with 2 consecutive horizontal revolutions and land.
Make a clean landing with your boost at max.
Change from the stopping position to accelerating position on the word "GO!".
Get your score registered in the world rankings.
Finish a race in 1st place without crashing.
Raise your back leg while in the air and perform a back grab.
Complete all the Jib Trick Trials.
Complete all the Air Trick Trials.
Raise your front leg while in the air and perform a front grab.
Complete all the Fly Distance Trials.
Perform an air trick with 2 consecutive vertical revolutions and land.
Spread your arms wide to the left and right while in the air.
Perform an air trick and stick the landing.
Jump while you are boarding.
Complete all the Riding Trials.
Stomp your front foot when you have an item.