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.
Complete April 14.
Draw a full triangle.
Complete April 13.
Retrieve with care.
Inform yourself well.
Complete April 15.
Fulfill the prophecy.
Trust, but verify.
Drain the swamp.
Corner someone.
Make someone go to the wrong place.
Find what is hidden from sight.
Prevent a provocation.
Dispense deliverance.
Turn one on the other.
Frame someone.
Cause a stir.
Decrease their numbers.
Connect two loose ends.