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