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