Here is the full list of all 30 True Fear: Forsaken Souls achievements.
Finish one Act without using the Hint.
Find every Fact in one Act.
Find Heather.
Finish 5 hidden object scenes without using any Hints.
Solve 5 puzzles without using Skip.
Find one collectible figurine.
Find Katie.
Solve a puzzle without using Skip.
Finish a hidden object scene without using any Hints.
Find a Fact.
Finish all hidden object scenes without using any Hints.
Solve all puzzles without using Skip.
Finish two Acts without using the Hint.
Finish all Acts without using Hints.
Finish the Bonus Chapter without using Skip.
Play non-stop for an hour.
Play non-stop for 3 hours.
Finish the game without stopping.
Finish the Bonus Chapter without stopping.
Discover Mother's secret behind the carved door.
Discover what's underneath the house.
Find Jack.
Find half of the collectible figurines.
Find all collectible figurines.
Find every Fact in the main game.
Find all the Facts in the Bonus Chapter.
Finish the main game.
Finish the main game on Expert difficulty.
Finish Bonus Chapter.
Earn all Achievements.