Following Nightmare Fuel policy, all spoilers are unmarked.
- The "Axe" ending. After Clover goes Ax-Crazy, her Slasher Smile after killing Santa, Seven, and June. She never really started acting strangely until Door 1, and when you realise she has gone to get revenge on the others, you may believe she is just being an Anti-Hero. But, she walks out calmly, covered in blood, with a demonic, but cheery, grin on her face. Junpei's own Sanity Slippage doesn't help either. He first describes Clover as if she was wearing a mask made out of human skin. Not literally, but her Slasher Smile didn't match the complete emptiness of her eyes. As he goes over the Despair Event Horizon, he starts seeing her as surrounded by a holy light, describing her as both a fierce god and a benevolent goddess filled with love. The shift in tone is completely unsettling. And then Junpei takes her hand...◊ and you get to enjoy watching him slowly die. Worst of it all? You've been warned. Via a missable joke in the previous room, by messing with the camera after activating the monitors behind it.
- The "Syringe" ending, exclusive to the iOS remake, which is a sister ending to the Axe ending. Junpei forces his way through Door 3, where he finds "Snake's" corpse. Clover takes his insistence to go through that door as a sign he killed Snake, lures him down to the D-Deck, and then injects him with the same anesthetic Ace used to knock himself out. As he starts to pass out, he realizes he's about to fall into the water. He begs for help, but Clover just smiles and says she'd never help him.
- The "Knife" ending. Something about the exact moment the player was stabbed is terrifying. It has on more than one occasion said to make even those who had seen it before jump with shock...
- The "Submarine" ending. You just emerge from the confinement room and the torture room, the two most suspicious rooms on the ship, and finally prepared to take a breath, you return to the lobby. There, you are met with the bodies of all the other characters, soaked in blood. Furthermore, you'd think the name implies Junpei would escape in this ending by the submarine, yet, Junpei gets stabbed in the back, in an example of a Jump Scare done right.
- The gory, detailed descriptions of The Ninth Man and Nijisaki's mangled bodies. Thankfully, the remaster for The Nonary Games makes these descriptions mostly avoidable in Adventure mode, although they are still present in Novel mode.
"The dark reddish-black pool of blood... The scattered pieces of flesh... Organs strewn across the floor like the blossoming of a grotesque flower... The explosion that had torn through his body had beed powerful. The 9th man's neck had been twisted at an odd angle. Junpei suspected the explosion had thrown him against the wall. Half of his face was crushed, and the other half was covered in blood. Most of his abdomen had been emptied, either by explosion or by gravity. He had landed on his back, and stark white ribs jutted out of his chest like some sort of macabre crab."
- In the "Safe" ending, When Snake lunges at Ace "like a zombie," repeating "I'll kill you." Although Snake is, of course, on your side, to see the normally calm and reserved character be broken so far from his usual demenour in a mad, unending, determined rage is still unsettling.
- Pressing the keyboard in the captain's quarters. It's almost seems as if Zero put the dead guy in the room to give you hope. The cameras reveal that Zero could be watching you the entire time - and you didn't know it. When you press the keys, the letters come on screen, ZERO. As if to mock you.
- The game over theme, Quietus. The first part sounds like someone's drift into madness.