Complete each requirement to receive the achievements.

Achievement	How to unlock
Ambient Master	Complete three levels in each Ambient Forever zone.
Black Hole Sun	Collapse the system in level F2-3 by feeding the Attractor.
Disciple of the Osmos	Complete all tutorial zones.
Fittest	Complete all Sentient zones.
Graduate of the Osmos	Complete the game.
Gravitronics	Complete all Force zones.
Master of the Deep	Complete five levels in any Forever zone.
Master of the Force	Complete three levels in each Force Forever zone.
Purity	Complete all Ambient zones.
Viral Master	Complete three levels in each Sentient Forever zone.
Voyager	Unlock all zones.