Here is the full list of all 21 Boxes Inc achievements.
Process 10000 packages
Process correctly 1000 erroneous parcels
Process 1000 packages
Process correctly 30 packages in 60 second
Process correctly 20 packages in 60 second
300 unchecked parcels in warehouse
100 unchecked parcels in warehouse
Finish the game
Process correctly 100 erroneous parcels
Process correctly 10 packages in 60 second
Earn 800 dollars
Process 100 packages
To throw a parcel in a pipe at a large distance
Process correctly 10 erroneous parcels
To throw a parcel in a pipe at a medium distance
To throw a parcel in a pipe at a small distance
Earn 650 dollars
Earn 500 dollars
First level is complite
Process 10 packages
Process the first package