Here is the full list of all 12 SkyDrift achievements worth 200 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox 360.
Unlocked all Skins.
Won a race with every plane.
Unlocked all Planes.
Collected all Badges.
Won a multiplayer game.
Completed the campaign.
Unlocked all events in the campaign.
Completed at least one match for 7 consecutive days.
Collected 10 Badges.
Unlocked Stage 2.
Used every powerup in the game at least once.
Killed two players at the same time with Shockwave.