[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/rsz_hungry_jhooo_8816.png]] [[caption-width-right:350: Meet the [[SuperPersistentPredator Devil]][[OhCrap jho.]] ]]

While MonsterHunter mainly borders on sheer [[CrowningMomentOfAwesome awesomeness]], some of the things present are a little more than [[NightmareFuel sheer terror.]]
* To start, whenever a large monster in the area sights you, a ScareChord plays. Woe betide you if the monster is right behind you and you didn't expect it, or you're headed for an area boundary and the monster suddenly shows up right in front of you. It's a JumpScare both out-of and InUniverse, because unless you have certain food buffs, your character ''[[OhCrap flinches]]''.
* The Royal Ludroth's glowing yellow eyes underwater. Imagine that in place of {{Jaws}}...
** Just about any GlowingEyesOfDoom monsters qualify.
* In ''Tri'', one of the stages of the Tundra is an ice cave. The floor of the ice cave is transparent ice, which underneath can be seen thousands of bones. These caves also tend to be the dwelling areas of the Gigginox, who in and of themselves are a nightmare.
** Speaking of the Gigginox, the Khezu is horrifying. That sniffing...
** To go into specifics, both are gurgling, worm like creatures that live in darkness. They both exhibit weird sounds, and they tend to appear when you're fighting other monsters. If the other entries haven't taught you to fear the dark, [[ShmuckBait try seeking one out.]]
** In ''Tri'' (but not ''Tri Ultimate'' and ''Portable 3rd''), the caves in Tundra areas 4 and 5 are pitch-black due to a lack of light. All you can see of the Gigginox are its bioluminescent patches. [[SarcasmMode Sweet dreams.]]
* The Diablos gives a good JumpScare whenever it erupts from the sand, and then screeches at full volume.
* Any time an environment is unstable. Any of the already mentioned monsters could appear when you least wanted it, and quite a few players have been introduced to the Gigginox this way...
* Rage Mode, especially for the Deviljho.
* The Ceadeus and Goldbeard Ceadeus, if you think about it. The standard Ceadeus has one horn growing [[EyeScream over its eye]], which--as evidenced by the Moga earthquakes--causes it an immense amount of pain. To make matters worse, the Goldbeard Ceadeus' eyes have both fallen victim to its horns in the same way, assumedly blinding it entirely. But, like the Khezu, it can still sense where you are. ''But, unlike'' the Khezu, it doesn't need to sniff around. It just ''knows.''
* Quite a few of the Ecologies fit into this. For example...
** The afore mentioned Khezu dragging a Kelbi to its doom.
** The Gobul swallowing whole an entire school of fish, which simply disappear in a flash, before attacking and swallowing whole a cow-sized Epioth.
** The Plesioth attacking an Aptonoth trying to get a drink, dragging it into the water with it making but a token effort to escape its doom.
** The Gigginox vomiting up its young complete with high pitched gurgling. [[SarcasmMode Lovely.]]
** The Nargacuga, circa ''Tri'', at least initially. Pitch dark forest, looking around...then suddenly, a pair of [[GlowingEyesofDoom red eyes]] light up right in front of you. ''Oh shit.''
* One of the new monsters in Monster Hunter 4 is a giant scorpion/earwig creature, which snatches a smaller monster with no prior warning... and then ''fuses'' with it.
* The Daimyo Hermitaur and the Shogun Ceanataur are based off of giant hermit crabs. So, they'd live in giant shells or rocks, right? No, they live in the massive skulls of ''other'' nightmare inducing monsters.
* The Deviljho, originating from ''Tri'', is the personification of this. They're gigantic monsters akin to a tyrannosaur, but look and act more like Franchise/{{Godzilla}} in a bad mood, and have a roar that, as the HellIsThatNoise entry on the YMMV page describes, sounds less like a roar and more like a bomb going off. They're massive apex predators who can wipe out entire species when hungry, and when they get mad, ''they wreath themselves in their own rage'' (see above picture).
** They have a nasty tendency to pop out when you're fighting other monsters. You could just be walking around on any assigned High Rank mission, and then [[RandomEncounter BOOM]]. Deviljho incoming, and all you can think about is getting out of there as quickly as possible. Then there's the Savage Deviljho, providing the page image...
** To further add to this, the "Everyone So Big-Big!" cinematic contains all sorts of monsters. As Cha-Cha walks along, they all sit tight (except for a Giggi)... but then he reaches the end and a Deviljho appears and starts chasing him and the hunter.
** A rare occurrence is when a Deviljho moves into the area you're in JUST as you are walking into the stage boundary. You're not expecting anything and then OH MY GOD THERE'S A GIANT FREAKING DINOSAUR RIGHT IN FRONT OF ME. And of course it plays the ScareChord of a monster noticing you. Watch out, [[TheSlenderManMythos Slender Man]]... there's a new {{Jump Scare}}r in town.
** Remember that Rage mode mentioned above? Well, along with speed and attack boost, the Deviljho is able to hit you with defense down and severe dragonblight. [[BringMyBrownPants Pants heavy enough?]] [[SarcasmMode Because it gets better]]. That stat boost and the ability to induce dragonblight?? That's Savage Deviljho in a GOOD MOOD!
* The Gigginox (mentioned above) can reproduce by itself and produce hundreds of baby Giggi in one day, take a second to think what would happen if even one days worth of baby Giggi survived into adulthood, all producing more and more baby Giggi.
** One more thing that's always made the Gigginox unsettling is the fact that it's very near bilaterally symmetrical down its waist. It clearly has a front and back end, evidenced by the fact that one side dispenses toxins and the other lays eggs, but they're similar to the point that it can sometimes be hard to distinguish between the two. Of course, on top of ''that'', it raises both ends when it roars (upon seeing you or entering rage mode). So does that mean [[UnfortunateImplications that it...?]] ...Ugh.
** The Giggi themselves are pretty creepy, having no eyes and a gaping mouth with MoreTeethThanTheOsmondFamily. They can latch on to you, sapping your HP until you roll them off.
* The new flagship monster for Monster Hunter 4 is the Goa Magara, which is essentially a Gigginox, but [[FromBadToWorse worse.]] Take the Gigginox, paint it [[DarkIsEvil black]], give it an insect-like exoskeleton, make it an ''Elder Dragon'', and give it the ability to start a ZombieApocalypse simply by having a hunter or another monster touch it or the hair and scales it leaves behind. The end result looks a lot like a Xenomorph. It's theme music isn't that bad, but its "noticed you" ScareChord is absolutely ''terrifying''. Oh, and the worst part? [[spoiler: It's only in its juvenile form. There's an adult version of it later in the game, which is even [[BlatantLies even more fun.]]]]
* The Yama Tsukami is also a little creepy with it looking like a floating Cthulhu head, fortunately it's peaceful in-universe except when approached by hunters.
** Creepy initially; worse still when you see its mouth.
* Endgame monsters like Akantor can be pretty scary the first time you fight them, with attacks that can easily OHKO you, being larger than any monster you fought up to that point, and most of the areas you fight them in, you can't get back to the camp once you enter it.
* Frontier's Raviente is the largest monster in the series and possibly one of the most intimidating. When it gets hungry, it gets up and starts ''wiping out entire ecosystems.'' It takes dozens of hunters several hours to kill this thing... if they even do.
** Its [[https://www.youtube.com/watch?v=T_GS61DtvPo introductory video]] really shows you how hugely destructive this thing is. Depicting a peaceful island, flourishing with life, the mood suddenly gets tense and all the monsters start fleeing from something. Suddenly. the Raviente pops up from the ground, swallows a dozen tank-sized Aptonoth in one bite, then proceeds to destroy everything in its wake. A volcano erupts, the earth splits, and this is all from one monster. It really means something when everything else, up to the Espinas and the Rathian, is ''[[TheDreaded running away from you.]]''
* OK, so you all saw the above, and you may ask: What can be worse? How about [[spoiler:Gogumajios]] from ''4G''? It IS, probably in the whole franchise, the closest thing to a [[Flim/{{Godzilla2014}} MUTO]] or a [[Film/PacificRim Class-5 Kaiju]], and totally doesn't look out of place in a Kaiju movie. If you think a '''six-legged, chemical-eating, multi-storey zombie-like behemoth covered with crude oil''' doesn't look scary, how about adding ''[[BreathWeapon a large-scale crude oil breath]]'' to the mix? And [[http://www.youtube.com/watch?v=igmRpKZlbjM its]] [[http://www.youtube.com/watch?v=NJxd0wdo3ns theme music]] is just downright scary. [[spoiler:Also, when this thing flies (yes, this thing can ''fly''), it unleashes an attack pattern which is nothing short of decimating the whole area]]. No wonder the guild want to fix the fort ASAP.
** Also, unlike other end-game bosses (ala Elder Dragons) in the franchise, which at least have some sort of in-game references (be it poems, documents and else) hinting their presence or origins, ''[[NothingIsScarier there's absolutely nothing]]'' hinting the presence of [[spoiler:Gogumajios]]. It really sinks that, when the guild ''knows nothing'' about an ancient monster [[spoiler:which bears the '''first''' Dragonator on its back]], then ''where the hell does this thing come from!?'' [[spoiler:And then there's the whole WMG about Gogumajios is actually an artificial dragon-weapon which want revenge on humans......]]
* ''Frontier-G'' gives us two extra monsters, also both unknown - in fact they are literally ''called'' "[[EveryoneCallsHimBarkeep Unknown]]" because they're such a recent and powerful find that no one knows what to name them. There's even a big UNKNOWN stamp on the screen on the start of the quest to warn you that you're about to face one. One monster is dubbed the Black Flying Wyvern, similar to the Rathian and is RedAndBlackAndEvilAllOver; the other is the Black Fox Wyvern, which looks like an odd fusion of Tigrex and Nargacuga with colour-swapping diamonds on its body, and is again red and black.
** Special mention goes to the Black Flying Wyvern. If you attempt the highest-difficulty version of its quest, you're in for a surprise; it gets a [[TurnsRed second phase]] where it suddenly takes off into the sky at incredible speeds, creating a ''whirlwind drops massive chunks of the tower on you'' if you don't move. And when it comes back down, its red parts have become '''blazing inferno orange and are literally [[IncendiaryExponent on fire]]''', including two parts on its head which now resemble GlowingEyesOfDoom, and it is now more violent and ''much'' more powerful. It gives the vibe that you're not hunting a monster, but rather a demon that crawled out of the pits of Hell. The musical score even changes to reflect this, as if to say, "You're not hunting anymore. You're struggling to survive."
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''[[ScrewThisImOuttaHere QUEST ABANDONED]]''
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