Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Amnesia	Complete the game without saving.
Anxiety	Complete the game in under three hours.
Crucifixion	Kill an enemy using a trap.
Death	Let the shadows consume you.
Dedication	Collect all of William's diary entries.
Electricity	Start the generator.
Escape	Escape from the bathroom.
Frustration	Locate Anna.
Gunsmith	Create the shotgun.
Journey	Travel to the past.
Killer	Kill 20 enemies.
Loop	Escape the infinite room.
Love	Collect all of Maria's diary entries.
Master Key	Solve all the combination key puzzles.
Mind	Activate the door to the operation area.
Nostalgia	Complete the game.
Obsession	Unlock the door under the hall stairs.
Redemption	Collect all of Bertram's diary entries.
Registry	Save the game.
Relief	Pick up five first aid kits.
Remembrance	Find your old hiding place.
Remorse	Save only yourself.
Sacrifice	Open the vault.
Serial Killer	Kill 40 enemies.
Sisters	Escape with Anna.
Suffering	Collect all of Anna's diary entries.
Surgery	Reattach a limb.
Untouchable	Complete the game without using any health items.
Water	Start the pump.