This achievement requires you to earn gold in all career tracks.
This includes:All trials tracksAll stadium tracks and finalesThe grand finale track
(Unlocked after completing all stadium finales)
The skill games and ninja tracks are not needed for this achievement
Apart from obviously completing the track as fast as you can you will also want to limit your faults as this will add five seconds every time you reset to a checkpoint.
Note: You can see if your on track for a gold on the tracks progress bar, just look for the gold emblem.
The only track that really gave me grief was inferno five so id recommend using this video:
If your having trouble with any of the other extreme tracks id check out the university of trials you tube channel.If the achievement fails to pop double check the grand finale the cup is gold but you'll have to click on it to see your medal