Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Blunt the Sharpness	Unlock the ability to shatter blocks.
Celestial Vibration	Collect 40 echoes of the Dark planet.
Complete Attunement	Gather all echoes of the Dark planet.
Elusive and Intangible	Remain airborne for 90 seconds or more.
Eternally Present	BUILD 10000 blocks over the course of one game (same save file)
First Echoes	Collect 25 echoes of the Dark planet.
Fish Cannot Leave Deep Waters	Complete the Highlands monolith.
Formless Substance	PUSH 20000 debris and fragments over the course of one game (same save file)
Heartfelt Reunion	Reunite Light and Dark, causing Two to be as One once more.
Hollow to be Full	Clear 3000 debris and fragments with a single CLEAN.
Merge with Dust	Unlock the ability to return to nothingness.
Perception of the Nature of Things	Complete the Temple monolith.
Perseverance	Cut through 1000 blocks or more in a single CUT.
Return to the Infinite	CLEAN 20000 blocks over the course of one game (same save file)
Soft and Weak Overcome Hard and Strong	Complete the Haven monolith.
Soften the Glare	Unlock the ability to control the flow of time.
The Dust of the Earth	Push 1000 debris and fragments with a single PUSH.
The Enlightened	Read half the words of the Way.
The Erudite	Read 10 steles bearing the words of the Way.
The Gate to All Mystery	Complete the first monolith, allowing the Light planet to reveal itself.
The Great Oneness	Reach the 100% completion mark.
The Low is the Foundation of the High	Reach maximum velocity.
The Perfect Square has no Corners	CUT 20000 blocks over the course of one game (same save file)
The Sage	Read all the words of the Way.
The Strength of the Spirit	Boost 50 consecutive times without touching the ground.
The Swift Messenger	Restore all the links between Light and Dark in less than 20 minutes.
Untangle the Knot	Unlock the ability to turn the balance of the world upside-down.