Here is the full list of all 30 The Sorrowvirus: A Faceless Short Story achievements.
Get the Forever Ending.
Get the Filicide Ending.
Get the Remnant Ending.
Get the True Ending.
Get all four endings and then relive the sorrow once again.
Complete the first instance.
Complete the second instance.
Complete the third instance.
Complete the fourth and final instance.
Find the secret room.
Find the bonus Grandfather Clock.
Find Rosco's watch.
Find Elijah Grey's recording.
Get into Cassandra Noble's safe room.
Get into the Fallen Grace Church.
Successfully make it through the cave without dying.
Listen to the last words of a Wakeland City victim.
Free Wyatt's soul.
Read all of the notes.
Complete The Sorrowvirus without dying once.
Complete all four instances of The Sorrowvirus without dying once.
Find Rosco Heller's recording.
Find the hidden door.
Node Graph out of Date. Rebuilding...
Find the hidden collectable Darkwen doll.
Find the hidden collectable Darktore doll.
Discover The Gallery.
Reach the fourth and final instance.