Here is the full list of all 33 The Painscreek Killings achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
You're Fired
Completionist
Dying Man's Letter
Truth Revealed
Missing Journalist
All Letters Found
All Newspaper Articles Found
Sofia Miller's Story
All Keys Found
Bernard Hopkin's Story
Wanda Tyler's Story
All Tools Found
Oliver Gibson's Story
Steve Moss' Story
Dorothy Patterson's Story
Bloody Knife
Scott Brooks' Story
Derrick Tyler's Story
Guest's Lost Cap
Case Unsolved
Here Lies Sofia
Scott's Secrets
The Hidden Truth
Trisha Roberts' Story
Charles Roberts' Story
Matthew Brooks' Story
Vivian Roberts' Story
The Secret Lies With Her
Mary Martinez's Story
Best Friends Forever
Andrew Reed's Story
Tutorial Completed
James Howard's Story