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.
Truth Revealed
All Keys Found
Matthew Brooks' Story
Bernard Hopkin's Story
Bloody Knife
Wanda Tyler's Story
Charles Roberts' Story
Best Friends Forever
All Tools Found
Oliver Gibson's Story
Sofia Miller's Story
Dorothy Patterson's Story
All Newspaper Articles Found
Steve Moss' Story
Here Lies Sofia
Scott Brooks' Story
Scott's Secrets
Trisha Roberts' Story
Vivian Roberts' Story
Dying Man's Letter
The Hidden Truth
Case Unsolved
Andrew Reed's Story
The Secret Lies With Her
Mary Martinez's Story
Tutorial Completed
James Howard's Story
Derrick Tyler's Story
All Letters Found
Completionist
Missing Journalist
You're Fired
Guest's Lost Cap