This achievement is earned after you win all 12 levels in Gate Rally.
You can play on easy difficulty against the bots with the minimum of 8 laps, you should be able to win every race with no problems. Remember to use boost as much as you can, simpily flick the
up to do a front flip which earns you boost, also if you front flip at the very start you earn extra boost to give you a quick lead.
All the maps are fairly short, the longest one took me 5:30 and the shorter one are only about 2 minutes. The achievement will pop on the post-race screen after your last race.