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