This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / Resident Evil 2
Sherry? Sweetie? Your daddy's here....
The themes for Birkin's various forms are often considered some of the most frightening music in the series.
Dear lord, the music that plays in the police station basement is so chilling. You go down the stairs and the music comes on. Scary enough, but then you hear a "tap... tap... tap" noise. You are now frozen in fear at this point and know that zombie dogs await you. The combination of the dogs and the music is enough to drive a player to complete their tasks and move on from the basement as quickly as possible.
"If you're stranded in the desert with this song on your iPod, you'd most likely survive the heatstroke. It's just that fucking cold."
Experiment room, anyone? It doesn't help that it's filled with three Lickers, gruesome failed experiments, dead Umbrella soldiers that look like HUNK, and one lone, empty capsule that's been broken open... from the inside. The incredibly unsettling music does not help.
The introduction of the Licker. When you enter that room in the police station and whatthefuckwasthat you glimpse a skinless, man-sized thing padding across the outside of the window like a gecko. You look back and... nothing there. Your paranoia approximately doubles, ready for you to meet it for real a tad later.
And noises the things make, made even worse when you can't see them due to the camera angle. When you hear the clicking sound of their claws speed up, you know it's about to attack.
I really, really, REALLY don't want to talk about G. But, it seems I have no choice so, *takes deep breath* Here we go:
Here's the thing: The G-Virus doesn't create zombies - it creates the unholy spawn of Satan◊ and some◊ kind of◊ devastating◊ cancer◊ - trying to kill the damn thing is preposterously risky, as the G-Virus was meant to have regenerative properties and every one of those is stages of the same mutations brought on by fighting it without eliminating it. You'll notice that that second one there? His head has started deteriorating and being replaced with a new one - that's his face you'll notice on the left side of his chest if you look close enough. That new head, as seen in the third stage, looks like a freaking devilish skull, and starting there, it starts developing multiple limbs, all tipped with foot-long sickle claws, and More Teeth than the Osmond Family until it finally hits the last form, a shapeless toothy blob of flesh with corpselike arms sticking out all over it. It also creates embryos it launches into live humans' mouths once it gets an opening, which then develop inside said humans until they're finally developed and bursts out of their chests and rapidly grow into something like this◊ (or, more famously, this◊). It just gets worse and worse when you hear its theme music. Or, for that matter, if you remember that, like most of the main boss monsters, it Was Once a Man (albeit a truly vile man), an Umbrella scientist with a fellow Mad Scientist for a wife and an Ill Girl kid, both met through the game in which it appears, who injected it into himself both in an attempt to save himself (again, its regenerative properties) after surviving a machine gun spray and to keep Umbrella getting ahold of this thought-to-be masterpiece of his (it in itself was obviously not as planned).
Hearing G's roar for the first time is utterly chilling, especially since it comes out of nowhere.
Sherry: But there's something out there. I don't know what it is, but I saw it. Much larger than any of those zombies... and it's coming after me!
(loud, inhuman roar suddenly cuts through the air)
Arguably, it's actually not all that inhuman. It just sounds like a person making a "RAAAR!" sound. Which makes it so much worse, rather than the Narm you might think it would be.
Poor Sherry Birkin's entire existance when you think about it. Her father is one of Umbrella's most despicable researchers and a man who has a history of letting his curiosity get the better of him and honestly from how it appears, had very little if any time to spend with her. Sherry's mother is barely any better (although the worst she's probably guilty of besides providing Brian Irons with bribe money to keep Umbrella's acts secret is the lengths she goes for her husband) and whom probably only at the time the Raccoon City incident began finally showed any concern for Sherry's well being and ordered her to go to the police station. Sherry is no safer in the station than back home or on the streets and finds herself not only hunted by zombies, but the likes of Mr. X and what was once her own father. And then her father eventually implants her with his embryos (which Claire and Leon only barely manage to save her from). Then with both her parents dead, she's at first in US government's protection and then fell into her father's good friend, good ol uncle AlbertWesker before finally left in better hands under US National Security Advisor Derek Simmons's protection. It's a wonder she's made it through all this.
He raped at least one woman in college, he may have had his secretary killed, arrests a reporter without charging him, and his policies towards ammunition storage and the door key system were intentionally designed to cause as many casualties as possible in a disaster. It's bad enough that he moved through the police station, killing off survivors so that they couldn't leave his "beautiful city," (and then later wrote a diary entry about how beautiful the pained face of one of his employees was) but his love of taxidermy and stuffing the mayor's daughter as a trophy to "preserve her beauty"?! Just goes to show you don't have to be infected to be a monster.
This quote from the Dark Id LP sums up Brian Irons's state of mind in this chilling statement:
This one's a bit of a stretch and a minor example, but one of the files you pick up, named "Secretary's Diary B", has Brian Irons's secretary saying that she "found out what the chief has been hiding all along" and that if he finds out, her life is going to be in serious danger and the next page says it got late and that she's just going to take that one day at a time... and then we turn to the next page. The last page is ominously blank. Since every other diary up to this point has been written in to the very last page, we can deduce that Irons got her before she could finish writing... Now you see, this wouldn't be that scary if this wasn't freakin' BRIAN IRONS we were talking about.
Notably, the Dark Id's LP, when it gets to Brian Irons, plays him utterly straight (apart from some very, veryBlack Comedy), and he becomes a Knight of Cerebus in a LP that managed to make every other piece of the game hilarious.
Irons: That's the mayor's daughter. I was told to look after her. But I failed, miserably.
And then there's his room in the basement. The Dark Id's LP sums it up like this:
Claire: *at the table with the saw* And this is where Chief Irons would bind his victims and cut out their still beating hearts. Which he would show to them with glee as they breathed their last. *at the shelves full of chemicals* Here we have the chemicals which the Chief used to subdue his victims as he raped them over and over and inflicted grievous, painful burns across their body until death mercifully came. After that, he would strip the flesh from their bones and collect trophies from their remains. Many of which you can see displayed prominently here. *moving over to Irons' corpse* Finally, we have the mutilated corpse of the man himself. Who died and agonizing death as a horrible mutant gestated inside his body and tore him asunder from the inside out at birth. Much like the chestbursters from Alien. Only far more gruesome and painful. Did I mention the implanted monster came from the penis tentacle on the hand of your terrible mutant father? Who searches for you, to do the same, as we speak.
Two words: Mr. X. AKA Tyrant T-103. Its theme music alone will terrify you, and there's the paranoia that it may smash its way through the wall any moment. Which he does at one point. And unlike Nemesis, there is no forewarning to his appearance, but when you hear the characteristic Scare Chord, you know it's time to haul ass.
The blood-sucking, poison-spraying, giant moth, and its lair, the eggs on the walls and ceiling with maggots dropping out of them, and the music.
Files you find in the police station are mostly from police officers who survived the initial zombie attack. They talk about plans to take the station back and rescue survivors, but all of it failed.
Entering the western wing from the police station's main hall treats you to a high-angle shot that shows almost nothing ahead of your character, despite the fact that you can hear the footsteps of zombies approaching you. Lots of footsteps, to the point that you either turn tail and run back out to the lobby or start firing blindly in their direction and praying you can drop them all before they reach you. Newbies may complain about the fixed camera angles nowadays, but there's a damn good reason several contemporary reviews called attention to this specific moment as being one of the most tense and frightening parts early in the game.
The scene where Marvin (the lone officer you meet in the police station) becomes a zombie. You find him just in time for him to transform, and you get a close up of his face decaying for your pleasure. Poor Marvin really got a raw deal, and that's saying something considering everything going on in the nightmarish outbreak. He knows full-well he's wounded and infected, thus will inevitably suffer brain death as the virus destroys his sapience. Yet he tries to thwart the T-virus anyway, by ordering you to leave and locking himself up so he can't harm you. How do you thank him? By poking your nose back in his office as he's dying. His last human sound is a sad groan, knowing you're in danger, before he lunges upon you.
Lickers. Flayed creatures that can crawl on the walls and ceiling and attack you with their claws and absurdly long tongue. But what seals the deal is how they are introduced. The first glimpse you get of one is as it zips by a window. Then, you enter a hallway that is drenched in blood. A corpse lays in the hallway, decapitated with its head twisted off. All while the sound of something like a leaky faucet is heard. You get a short cutscene of your character looking up to see the Licker, slowly stalking along the ceiling, hissing and dropping to the floor in front of you. Is it any wonder they have become one of the series' most iconic enemies? Not to mention it could have been even worse: Your character's startled reaction before looking up was supposed to be from the aforementioned corpse's head dropping down in front of them, but it was Dummied Out at the last minute.