Sonic Drift Achievement in Sonic & All-Stars Racing Transformed
Did a 10 second Drift as Sonic
How to unlock Sonic Drift
There are quite a few stages to unlock this. The one I used was Vyse's stage on lap 3 where the stage will explode and you will have an absolutely huge area to drift the plane in. The death hangar can also be a great place for this as it has crazy drifts at the beginning.