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