Play the crooked man. It is a great game, and I dont think there are many playthroughs of it. (1 or 2). If you dont want to do that I would suggest Ib, but TONS of people have done that. Hope I helped!!!!
Really build up the story. Scares are a main part of a horror game, but the story is the difference between a good and great game. If you want a good example of a game like that, I would suggest ib. It has both elements in it. Look forward to playing your game!!!!