Here is the full list of all 27 Parcel achievements.
Complete 10 levels created by other users.
Do everything else and ascend to greatness.
Create and share a level for others to play.
Complete all Basement levels.
Complete all Special Place levels.
Complete all the levels in the game.
Find the hidden easter egg.
Collect all Dataspheres.
Collect all Dataspheres written by Special Place users.
Complete all Common Place levels.
Collect all Dataspheres originating from Spectacle accounts.
Complete all Processor levels.
Unlock Shade.
Feel good for thinking you've saved humanity.
Play through the game without the fifth wheel.
Spare what is to be spared and complete marked levels.
Destroy what can be destroyed and complete marked levels.
Unlock Clobber.
Complete all Containment levels.
Hackman did his best to prevent you from being able to do this. Do it anyway.
Unlock Porter.
Complete all Greenhouse levels.
Unlock Hackman.
Complete all Factory levels.
Unlock Magna.
Complete all Ventilation levels.
Find the missing shipment.