Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Baseline	Finish all the internal levels under one hour.
Challenge accepted	Finish all the internal levels under 50 minutes.
Easy Ridin'	Finish all 54 internal levels.
Easy Steps	Finish 10 Stolen Internals levels.
Fly High!	Finish 5 Stolen Internals levels.
Friends will be friends	Finish an internal level in split-screen multiplayer.
Hardcore	Finish all the internal levels under 45 minutes.
High five!	Finish 5 internal levels.
I see good driving	Finish 54 Stolen Internals levels.
Impossible is nothing	Finish all the internal levels under 40 minutes.
Large laps done	Finish 25 Stolen Internals levels.
One for the road	Finish all the internal levels under 55 minutes.
One giant leap	Finish 25 internal levels.
One small step	Finish 10 internal levels.
Quick & Easy	Finish the Quick & Easy collection.
Quick & Hard	Finish the Quick & Hard collection.
This one's on the house	Finish an internal level.