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