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