[[caption-width-right:350:[[BodyHorror She doesn't]] [[UncannyValley look too well.]]]]

!!From The Sims 1:

* [[http://www.youtube.com/watch?v=4Il5aZhYy8E&NR=1 The sting]] (heard in the beginning) played when the burglar (or other dangerous event, such as raccoons) appears on your lot in the first game. The combination of the eerie music, the picture in picture highlighting the burglar's furtive and ever-forward movements, and the knowledge that you can't do anything about it - [[ClassicCheatCode not even cheating]]! - save for calling the police, is simply terrifying.
** GuideDangIt: Place the burglar alarm on the ''outside'' of your house, or [[AcceptableBreaksFromReality better yet]], make a single-tile wall on the very edge of your property (even better, make as many walls as you have "entrances" onto your property), and place a burglar alarm by that wall if you want to make absolutely certain the police will have enough time to catch the crook before he steals your possessions. As a bonus, this won't wake your sleeping Sims, unless (for whatever reason) their bed is outside.
* Even if they're meant to be prank calls, a lot of the messages your Sims hear when answering a ringing phone are downright ''creepy.'' Special mention goes to "They're coming soon. Better think twice about opening the door." And while you read the message, the little mask in the dialogue box just stares at you. Smiling.
** [[http://sims.wikia.com/wiki/Prank_calls Here]] is a list of all the prank call messages; they run the gamut from mundane ("Wrong number. Sorry.") to innocuously bizarre and silly ("Do you canoe?") to vaguely unsettling ("The drop off has been made. You've been warned.") to FUCKING OMINOUS ("The end is near. Make preparations.").
* The music when ghosts appear on the lot (heard in the same video as the sting above). The wailing and laughing noises they make when floating around doesn't exactly help.
* Pretty much ALL of the danger themes in that video. Especially the death themes, combined with the message that appears. "Deepest sympathy! ''Sim'' has just died. Though body is gone, spirit will always remain". The fire themes are also very shocking.

!! From The Sims 2
* It is unknown whether the alien babies come from intercourse or artificial insemination, but the only difference is the kind of trauma the Sim should have from that, especially after ending up with a green-skinned, black-eyed child that looks just like the aliens abusing you. Yes, the MrSeahorse-scene is funny, but would you want to be the one who it happened to?
** For Knowledge Sims, the answer is a very definite "Yes." Then again, this fits with [[FreakyIsCool the general philosophy of a Knowledge Sim]].
* The ghosts. Especially the red ones.
** Worse, the fact that the ghosts can literally ''scare your Sims to death.''

!! From The Sims 3
* [[http://www.youtube.com/watch?v=tc54RXrqEJs&feature=related The Grim Reaper's music in Sims 3]] is a mix of creepiness and CrowningMusicOfAwesome.
* Any time an NPC brings their toddler to the library, the kid crawls over to the toychest and literally disappears into the box. And if you teleport home when holding the neighbour's infant (uh, kidnapping) there's a good chance the infant will turn into an invisible, unfindable, crying baby.
* In World Adventures, at least two tombs have an inscription left by a previous explorer that ends with a variant of "I'm sure I'll find my way out any day now." Both have a skeleton lying a few feet away from them...
** [[FridgeHorror Becomes worse]], since we know the body disappears when The Grim Reaper appears, so that means that he couldn't reach these bodies, and that means [[FateWorseThanDeath their soul can't move on]].
*** NightmareRetardant since you can buy the skeletons from the buydebug cheat and the description says that it's a joke and made of plastic.
** The same Expansion Pack also gives us the death by Mummy's Curse. A very unlikely death, given how it occurs, but it's pretty unsettling all the same. For starters, when your Sim loses the fight with the Mummy, they have a chance of casting some kind of spell on them, with them screaming all the while. And a few days in, a strange border begins appearing around the screen when the view is on the Sim in question, with a ''skull fading in and out of view'', which gets more and more intense the longer the Curse is left. ''Eeesh.'' And then, when the time of death finally comes, the Sim is surrounded by a tornado and... just blows away. It's a very creepy death, especially in comparison to the rest of the deaths.
* The Mysterious Mr. Gnome and his variations. It's this weird looking gnome, with OffScreenTeleportation abilities, and can appear by your Sims's bed to [[ParanoiaFuel watch him/her/them sleep.]]. And there's nothing you can do to contain it.
** Creator/{{Seanbaby}} doesn't appear to be aware of this particular feature - when he does a brief LetsPlay of the game as an experiment in "psychology", several of the gnomes he set up to stare at the toilet so his subject would never feel comfortable peeing relocate to surrounding guard positions during the solitary confinement portion of the experiment. When he notices this, he expresses doubts about his own sanity (the sanity of his subject isn't exactly in question - it's quite definitively not there).
* The Werewolf transformation from the Supernatural expansion. The Sim looks (and sounds) like they're ''in pain'' when it happens. And if you're playing with the game on full moon, it happens whether you like it or not.
** Sims with the [[FlatEarthAtheist Supernatural Skeptic]] has special social interactions. Some are funny enough, like "imply mother is a junebug" when talking to fairies, but some are... unsettling. For example: Look through the options and see "Enthuse about Witch Hunts." The speech bubble even depicts [[TorchesAndPitchforks three torches.]] Keep in mind that witches usually were killed by fire.
** Some of the new paintings for this expansion changes their apprearance at night... and all of their alternative looks are visions of hell, death or evil.
* In the haunted house (The attraction, not a literal haunted house) look closely at the windows. This may sound stupid at first, but the person who dresses up as a ghost (By donning a bedsheet...) actually looks surprisingly creepy as it strides back and forth past window to window. It's the fluid movement that sells it.
* If you forget to pay your bills for some time, a repo-sim will be sent to your house to reclaim some of your stuff (equivalent to the amount of money you owe). Unfortunately, the game gives no notification or warning whatsoever, and when it happens, a [[ScareChord fairly ominous piece of music plays]] and suddenly a shady-looking sim in dark gray clothing enters your house and starts taking stuff. Many first-time players mistake the repo-sim for a burglar. Not exactly nightmarish, but still fairly alarming.
* The [[KrakenAndLeviathan Kraken]] that comes with "Island Paradise". Especially because it will often swim under your houseboat. Also, sharks.