Here is the full list of all 19 Orwell: Ignorance is Strength achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Decrease their numbers.
Connect two loose ends.
Prevent a provocation.
Draw a full triangle.
Find what is hidden from sight.
Complete April 15.
Dispense deliverance.
Complete April 14.
Make someone go to the wrong place.
Complete April 13.
Inform yourself well.
Retrieve with care.
Drain the swamp.
Fulfill the prophecy.
Trust, but verify.
Corner someone.
Turn one on the other.
Frame someone.
Cause a stir.