Unmarked spoilers below!
- The segments where you're looking through Mei Shin's eyes, and she's experiencing her bouts of illness where she's unable to concentrate on what she's doing or even breathe properly. There's plenty of Interface Screw during those moments to make it even worse.
- The segments before you reach the hub level, where you go through the apartment and it's filled with dolls representing the members of the family doing different things. There's a point where you go to Mei Shin's room and interact with the doll there and when you turn around all the other dolls in the house are crowded outside the room, staring at you.
- The hospital segment is fairly tame in terms of creepy (it's more disturbing than anything, like seeing the Mei Shin doll covered in treatment needles and having to remove them). The real creepy comes from the preceding hallway, which descends into Room Full of Crazy with doodles of children getting punctured on the walls.
- The sequence where you enter the hub level and you see a barred window in open space and can hear Li Fang talking to her mother through it — you open the window and realize that when she says "I think he's listening", clearly afraid to be caught asking to stay with her mother, she's talking about you. You're reenacting Feng Yu eavesdropping on his own wife. And then of course it's followed by a Jump Scare.
- When you finally reach the "flawless present" after going through the three different time periods, you're sitting on the couch watching Mei Shin perform on television and it's about as idyllic as the scene you started in. But if you look to the right, you can see a dark silhouette of Mei Shin staring at you from her room, not saying or doing anything and just covered in shadow enough that you can't make out her features. Eventually you see her more clearly, and then she slowly closes the door.
- During the ritual to "purify" Mei Shin, Feng Yu is at one point surrounded by Mei Shins with animal faces who crowd him and say various childlike phrases. But there's one thing she says repeatedly that's horrifying in the context of what really happened to her. "Dad, let me out! Let me out of here! Dad!"
- The parts of the ritual that happens afterwards, specifically gouging out your own eye with a spoon, ripping out your own tongue with a fork, and stabbing yourself in the hand, complete with ghastly noises and disturbingly realistic interface screw. Even if it's implied the first two portions were in reality only symbolic.
- The most terrifying thing about Devotion?: It can happen to you. The story kicks off because a parent who wants their child to be successful, but puts so much pressure on them that they develop anxiety/panic attacks, their 'perfect' family life crumbles, and eventually the parent falls into heavy devotion to a religion that will only do nothing but harm to them and their loved ones. That's what happens to Feng Yu, who loses his loving wife, his career, and his own daughter.
- The story of the ARG the developers set up prior to the game’s launch. The participants are tasked to find a missing girl who is presumably stalked by someone. However, the "stalker" is actually Li Fang's nephew and Mei Shin's younger cousin, now grown up. He is a private investigator investigating the cult, which has become a big charity organization for Cigu Guanyin, to put an end to it and prevent any further tragedies from happening, just like what it did to his aunt’s family twenty years ago. The missing girl is actually one of the cult’s believers. Before The Reveal, however, players have already submitted investigation data to the organization's website at the end of the ARG. By doing so, they exposed the investigator's location to the cult, and he may have been killed by the cult to hide the truth. In other words, real-world players unintentionally helped the fictional cult to get away scot-free.
- Of the game's occasional jump scares, the worst of them has to be the one in the 1986 building, where Li Fang's ghost rushes past you in the bedroom-connecting hallway. This is not because it's particularly scarier than the average jump scare, but rather because of a glitch that may prevent Li from showing up when she's supposed to. If that does happen, this event can still be triggered by chance whenever you walk through that section, potentially making this the one jump scare in the game that's absolutely impossible to see coming even in replays, unlike the others that are scripted and easily predicted in advance.
- The 1985 apartment features a scare similar to the one described above, but with the teleporting Creepy Doll that's supposed to be a stand-in for Mei Shin. In fact, this doll deserves a particular entry due to being disturbing enough on its own. It gratuitously abuses Offscreen Teleportation just for the sake of unnerving you, and at times, it feels like it's stalking the player. The doll even gets to move a bit during one of the puzzles, although in this case, it becomes Nightmare Retardant since it appears to be happily enjoying itself, which is a contrast to its usual depiction as a hellish motionless thing you have to do tasks to.
- The 1986 apartment has a very spooky atmosphere compared to the other timeline apartments. The living room is dark and filled with Feng Yu's religious paraphernalia, while the hallway has been completely vandalized by Mei Shin's unsettling doodles (and the ghost waiting to Jump Scare you the first time you walk there). It gets much worse once you play Li Fang's record and meet Mei Shin's apparition, as the place turns outright demonic in appearance, particularly the twitching eyeballs that become part of the scenery.
