You have entered the chapel where the mother is crying at the end of Chapter 3.
You have interacted with the star-shaped lightbulbs on the ceiling in Chapter 3.
You have entered the hidden room behind the fireplace in Chapter 2.
You have entered the house in Chapter 2.
You have interacted with the main character's portrait at the end of Chapter 1.
You have entered the trenches in the Chapter 1 flashback.
You have interacted with the dog bed in Chapter 1.
You have entered the house in Chapter 1.
You have watched the rolling credits until the end.
You have completed the Game.
