Nightmare Fuel / Dreamfall Chapters

• The neverending nightmares caused by using the Dream machine. At the beginning of the game, Zoe enters three nightmares and saves the dreamers. One nightmare is especially chilling, when you are on a dark, abandoned road with flickering street lights and a creepy soundtrack, creating an almost Silent Hill-esque atmosphere. Zoe also warns the dreamers that next time, she might not be able to find them, so they would be caught in their nightmare forever.
• The implication that Reza is not who he seems to be. Although Zoe largely has forgotten about her doubts about him by the time they get back together, she mentions that their relationships has some ups and downs and that they seem to be drifting apart. In the first episode, sometimes he acts normally, and then suddenly switches to sounding cold and annoyed. The possibility that Zoe is living with some false version of her boyfriend is unsettling.
• The Baba Yaga. Everything about her.
  • When entering Baba Yaga's lair, a gate shuts behind Zoe. If the camera aims behind the gate, the player can see three cats with glowing red eyes◊. Trying to open the gate spawns many more of these cats along the path◊.
• The concentration camp at Ge'en. From the piles of bodies to the constantly burning crematorium to the woman about to vivisect Bip, every element of the place is horrifying.
• The opening of Book 5 has Zoe in a warm, sunny hospital room, surrounded by photographs and get-well messages from her loved ones. However, when Zoe starts to look at them, she realizes that they are not real memories. And then, they start glowing, like a glitchy computer screen.