Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Ascent	Finish all regular levels in this chapter.
Better Fly Like Condor	Finish all regular levels in this chapter.
Brainiac's Mansion	Finish all regular levels in this chapter.
Clean Sweep	Finish all bonus levels.
Don't Panic!	Discover the ultimate answer to life, universe and everything.
Fall In	Finish all regular levels in this chapter.
Just for Fun I	Finish all regular levels in this chapter.
Just for Fun II	Finish all regular levels in this chapter.
Loaded Runner	Finish all regular levels in this chapter.
More of Hints	Finish all regular levels in this chapter.
Night with the Tentacles	Finish all regular levels in this chapter.
None Left Behind	Finish all levels in the game.
The Control Room	Finish The Great Cleanup.
The Great Cleanup I	Finish all regular levels in this chapter.
The Great Cleanup II	Finish all regular levels in this chapter.
The Great Cleanup III	Finish all regular levels in this chapter.
The Great Exit	Escape from the professor's mansion.