Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Back to the Past!	Go to an earlier time Hilltown.
Battle on the Bridge	Stop Michael Kutcher.
Behind the Mask	Neutralize the Doppelganger Mask.
Cunning Mind	Solve all puzzles without skipping.
Diligent Collector	Complete every collection.
For the Greater Good	Save the citizens of Hilltown.
Friend or Foe?	Get stabbed by Alexandra Anderson.
Hilltown Landing	Bring the boat back to port.
Honest Hearts	Rescue your family.
Keen Eye	Collect all the morphing objects.
Light from the Depth	Find the Lamp of Shadows.
Master of Deduction	Finish all HOPs without using a hint.
Mathematical!	Use the Keeper's Device.
Medical Intern	Give medicine to the Paul Anderson.
Memory of the Past	Collect all puzzle pieces.
On the Old Road	Return to the place where your life changed.