Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Breath Of Fresh Air	Reach the alleyway area.
A New Perspective	Walk on a wall.
Belly Of The Beast	Enter the Colossus.
Collector	Obtain your first collectible.
Completionist	Obtain all collectibles.
Crube Master	Complete the Crube area.
Daisy Chain	Obtain 3 collectibles.
Harvester	Obtain 2 collectibles.
Krob Master	Complete the Paired Krob puzzle.
One Down...	Bring down the Colossus.
One Small Step...	Place a Krob on a door.
Plummet	Reach the Skyscrapers.
Robotanist	Obtain 5 collectibles.
Savior	Obtain 4 collectibles.