[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/Phaaze_Unitdentified_Creature_3.jpg]] [[caption-width-right:350: Welcome to [[EldritchLocation Phaaze.]] ]]

From the graphic death of Crocomire to the game over screens of ''[[VideoGame/MetroidPrime Prime, Echoes and Corruption]]'', the Franchise/{{Metroid}} series sometimes [[NightmareFuel goes beyond the call of scary]].

The following examples have their own pages:

* NightmareFuel/MetroidFusion
* NightmareFuel/MetroidZeroMission
* NightmareFuel/MetroidSamusReturns

!Metroid II:
* A rather large portion of ''VideoGame/MetroidIIReturnOfSamus'' is nothing ''but'' NightmareFuel. After you leave the main tunnel with its heroic-sounding theme song, the side areas are completely silent other than a few random, tense, ambient sound effects...until the JumpScare of an evolved Metroid heading straight for you, completely with a frightening ScareChord. And, unlike most ''{{Franchise/Metroid}}'' games, the Metroids themselves are ''everywhere''...
* On that note, the environmental design was wonderfully creepy, especially since this was on Gameboy. The game starts on the surface, and the tension slowly rises as Samus uncovers an abandoned Chozo weapon factory deep beneath the earth, which itself is above the Nest. It's best symbolized by the Ice Beam pickup, found in the lair of the Metroids, with a partially destroyed Chozo statue showing that whatever happened here, it didn't end well for the Ancients. It certainly helps that the simple graphics coupled with the stark, isolated darkness of the caves of [=SR388=] help to drive the 'hostile alien world' feel home. On top of that, as you explore deeper into the caves, there is less and less of the other non-metroid native life in the caves all the way until the final area, where there are nothing but Metroids.
* The Metroid Queen's area is pretty spooky, too, especially when you've worked your Metroid counter down to 1 and are rolling through a random tunnel...''[[JumpScare when suddenly it jumps back up to 9]]''. Cue the classic Metroids attacking you en masse, and like the first game your beams don't stack, so if you didn't go back and get the Ice Beam, you're in trouble.

!Super Metroid:
* The entire intro sequence, with Space Station Ceres having dark, isolated halls with all the murdered scientists sprawled over the place. With the build-up to the title screen, it is framed exactly like a horror film.
* The room in Crateria that contains the sealed entrance to Tourian. For starters, it's filled with statues of the four major bosses that need to be defeated in order to access the area. These are creepy enough on their own, but seeing them all together (even if it's just as statues) takes it to a whole new level. Second, the music in this room is a very foreboding ambient track, which dials up the creep factor even more. Third and finally, it's possible to stumble across this room shortly after starting the game. While seeing all for bosses together might not frighten someone who's already defeated them, it certainly could have that effect on a first-time player, who is being shown right away the monstrosities they will have to face. It also might not even be clear to a new player what this room is for, and that it won't be use to them until later in the game, adding EmptyRoomPsych and NothingIsScarier to the mix.
* The whole sequence with Crocomire in ''VideoGame/SuperMetroid''. Forcing the creature into a pit of lava and watching its flesh melt off. Creepy. Oh, and then its skeleton pops back out for a moment only to crumble before you. Harmless but still freaky.
** Making this [[FridgeHorror worse]] is the fact that [[spoiler:Crocomire doesn't attack you until you attack it first, which implies that Crocomire is really just a peaceful creature and wants to be left alone, and that the Space Pirates stuck it in there purely because they wanted it dead ForTheEvulz. It's also in one of the few rooms in Upper Norfair that has the lava from Lower Norfair, and Crocomire might have survived the RingOut if it had been the lava from Upper Norfair.]]
* Draygon is arguably worse. Her battle starts off with a surprisingly effective JumpScare, and when you see that she looks like a [[Creator/HRGiger Gigeresque horror]], you'll see why. Her body pulsates in a disgusting manner, her eye looks mucus-coated and cancerous, her mouth looks like something out that wouldn't be out of place on a [[Franchise/{{Predator}} Yautja]], and if you look closely, there are at least three parts on her body that resemble '''human faces'''. After you've killed her, you are subject to seeing ''her own children starting to eat her corpse''. What the hell, Creator/{{Nintendo}}?
** Well, it was probably them burying her, but it could be both.
* The music for Spore Spawn, miniboss of the Brinstar area. The boss itself is kind of creepy, but it's this strange medley of piano music and tribal drumming that's really spine-tingling.
** Worse, it reappears for Botwoon, the miniboss of Maridia.
* "Item Room Ambience" is an ambiguously disturbing remix made entirely out of mysteriously telephone-ish beeps with an [[DroneOfDread extremely dark and ominous silence note]] in the background. Imagine waking up to that in a dark room in the middle of the night. Who needs sleep anyway?
* [[https://www.youtube.com/watch?v=Bwt740KznHE Mother Brain's theme]] is effectively OhCrap in musical form. Mother Brain herself is quite intimidating as well, seeing as it fakes you out into thinking the battle will just be a copy of the original's final boss. Nope. Instead, we're treated to a grotesque, snarling, drooling monstrosity that towers over you, who then proceeds to kick your ass. The music conveys the feeling of hopelessness quite well.
* Brinstar has numerous man-eating things in the floor and ceiling that trap you and deplete your health. While they do let go after a few seconds, they're still all kinds of "yuck" to look at. One area has a floor and ceiling comprising nothing but these creatures.
* There's something very ominous and eerie about the temple area of Lower Norfair, made worse by the chanting in the background music.
* The Crashed Ship. Until you defeat Phantoon (itself an exceedingly unnerving opponent) and the power comes back on, you are literally traversing a haunted wreck. There's no scientific explanation for it either, as far as you know you're simply being assaulted by ghosts. No other enemies either, just ghosts. And the ghosts? They're clusters of skulls fused together, waiting in invisibility and periodically attempting to ''appear into you'' then disappear. Good night!
* The room with the boss statue. A way of informing the player of what horrible monsters they'll have to fight (three of which warrant their own descriptions on this page). And you will have to visit this room at least once, because the statue's destruction opens the path to the final area. But what really pulls it together is [[https://www.youtube.com/watch?v=JJLz1wwOyCw that haunting ambiance]].
* [[https://tcrf.net/File:Super_Metroid_Unused_Palette_1.PNG This unused image of the surface of Crateria]] with a RedFilterOfDoom. There's something unnerving about it.

!Metroid Prime:
* Despite being marketed as a Sci-Fi First Person Shooter, the entire Metroid Prime trilogy has so much NightmareFuel that they might as well add "Horror" to the list of genres it lies within.
* The Chozo Ruins are pretty scary, all things considered. At first, they seem peaceful enough, then you get to the actual Chozo Temple, where the ghosts of the race that raised you attempt to kill you! And your only option if you want to get out alive is to kill what might essentially qualify as your surrogate family.
** The in-game Chozo Lore scan-files contain a fair amount of NightmareFuel too. Especially if you read them all in a row. Essentially, the Chozo lived peacefully until a meteor carrying the sentient toxin, Phazon, hit Tallon IV, killing off anything unable to adapt. And while they were slowly dying (or worse), they waited for their prophetic saviour, Samus, to arrive and save them all.
* The Game Over screens of ''VideoGame/MetroidPrime'' and ''VideoGame/MetroidPrime2Echoes''. Oops, you died. For your failure, you must watch poor Samus breathe her last. And in 2, you have to watch her heart come to a halt. Should you die in Morph Ball form in the the first ''Prime'' game, everything comes to a halt as Samus' ball form creates a ''massive explosion'' before the screen shuts down as normal (it's the same animation used when deploying Power Bombs). The other games just shows the Morph Ball "explode" by breaking up into pieces in a way that mimics Samus' death in the very first game. By extension, ''VideoGame/MetroidPrime3Corruption'''s Game Over screen isn't much better. Watching blood pool like that on the screen... disturbing, to say the least, and that's not even counting the NonStandardGameOver should you suffer from terminal corruption (see in Prime 3's section). No matter which game you play, Samus will always let out a bone chilling scream when she is killed.
* But the point in the game where the Metroid breaks out of the glass just after you fight your first Metroid is worse, [[JumpScare since it happens with pretty much no warning leaving you pretty much jumping out of your skin]], even if you're on a second play through and as such are expecting it. And then you get to walk past other Metroids trapped in similar apparati afterwards.
** Not to mention the first Metroid itself, if you hadn't played any of the games in the franchise before and only had a vague idea of what they did (from in-game scans).
** That scene is, by far, the absolute worst the first time around for fans of the original series. Why? Because you quickly realize you're in the worst possible situation: locked in a room. With a Metroid. '''''[[DeathByGenreSavviness AND NO ICE BEAM.]]'''''
** And then there were the Phazon Metroids in the third game. They can let Ice Missiles phase through them. YEEAARRGGHH!
* The way the Metroids grip your face in first-person. It can serve as a surprisingly effective JumpScare if you're not prepared for it, too.
* Phazon Mines! WHY, RETRO?! WHY?! Even with the Phazon Suit, it's scary to step in phazon. IT CRACKLES! CRACKLES! AND IT'S NOT JUST THE GEIGER COUNTER GOING OFF!
** Of course it crackles. [[spoiler:[[SentientPhlebotinum It's laughing at you.]]]]
* "Phazon Radiation" from the ''Prime'' sub-trilogy can make anything creepy.
* In Metroid Prime, scaning data in the Elite Control Room in the Phazon Mines reveals that the Space Pirates actually tried to reverse engineer Samus' morph ball. The R&D team then decided to cancel the project after several test subjects came out HORRIBLY DISFIGURED. To give you a rough idea, imagine being thrown into a car compactor...
** In general, most of the Pirate Data is this. Their utterly flippant attitude towards testing Phazon on ''live test subjects'', some of their own race, gives you an idea of just how utterly ruthless they are. Then, of course is the fact that they still want to weaponize Metroids, and even begin infusing ''them'' with Phazon.
** The Omega Pirate itself is the pinnacle of these horrific experiments, having been infused with so much Phazon that it can use it to recover from damage. It is also insanely durable plus able to teleport and turn invisible. And when it does turn invisible, it's Phazon infused veins can be seen as it vanishes and in the X-Ray Visor. It's very unsettling, not to mention thinking that these were planned to be mass-produced.
* The injuries many of the Space Pirates have suffered in the beginning of Metroid Prime are downright gruesome, and scans even show images of their injuries. Two of the worst ones happen to be one whose exoskeleton's joints were fused together by acid, leaving him unable to move, and another pirate who died by ''having his internal organs eaten while still alive''.
** When you enter the reactor you walk past several pirate corpses, with scans indicating that they were used as a food stash for the Parasite Queen.
* The titular Metroid Prime itself truly exemplifies the horror that Phazon itself brings. It's a Metroid so heavily mutated by Phazon that it barely resembles a Metroid anymore, resembling a GiantEnemyCrab more. The first form has an absurd amount of durability to boot. And when it dies, Prime goes all OneWingedAngel and abandons the carcass to reveal it's final form, the Essence, which only goes down to [[HoistByHisOwnPetard Phazon itself.]] Disturbingly, in both forms, Prime's face looks HUMANOID, albeit without a mouth. [[spoiler:[[FridgeHorror Must've been foreshadowing to the birth of Dark Samus.]]]]

!Metroid Prime 2 Echoes:
* The Dark Troopers. Right at the beginning, seeing the troopers you've been sent to rescue being turned into freakish automatons and turn their weapons against you. What makes it worse is finding the log books of marines who have either been ambushed or driven insane. One of the freakiest ones was the trooper who got away from the enemies, and as he was heading for the central building sees something in a hole, "Hello... Who's there?.."
** [[MadnessMantra They'll eat me. Eat.]]
** Scanning the dead troopers at the very beginning of the game, one of whom was confirmed to have "at least thirty" attackers involved in his death, or the one who died of cardiac arrest.
--->"Chemical levels in the body suggest a state of extreme fear at time of death."
** And it's...just...the horrible way they move. The jerky, "puppet with too few strings" motion, more zombie-like than a lot of actual game zombies. Especially when you're just starting out, and [[http://www.youtube.com/watch?v=uVRH_jO6uUY this music]] starts playing...
** Seeing dead marine corpses all over the floors and walls with almost no sign that could confirm how they died is creepy in itself. Such as the ones in the "hive" that ''drop from the ceiling when you enter this one room!'' ''Suspended from their necks like they were HANGED!''
* '''[[EldritchAbomination Emperor Ing.]]''' What's not to be terrified of? An immensely powerful, mutated RealityWarper far stronger than any other Ing. He's powered by about a quarter of the planet's energy, can regenerate by leeching off said energy, and can take many different forms. Some of his attacks are almost impossible to dodge, and he's only capable of being hurt under specific circumstances.
* The Grenchlers from ''Echoes''. The roars and appearance, they can swim AND jump really high and far which means there is pretty much no way to avoid them...
** Quite possibly the scariest part of the game: The ''[[FromBadToWorse Dark]]'' Grenchler.
* Dark Aether, a nightmarish version of the planet Aether in which you quickly lose energy when not standing in a light-provided safe zone. The enemies in Dark Aether are even tougher versions of their normal world counterparts.
* Some of the rooms in Torvus Bog's subterranean area have strange platforms that extend from the walls. The game never tells you what their purpose was, but if you look inside them you'll see some suspiciously shaped forms... and a look at the internal data reveals that these "platforms" you have to jump on are actually ''Luminoth graves''.
* Quadraxis; an enormous war machine whose every step makes the ground tremble. Armed with a [[{{Antimatter}} laser-guided annihilation reaction cannon]], a powerful force field generator, and [[{{OmnicidalManiac}} a hatred of all life]] courtesy of the Ing twisting it to their own ends, it is a formidable foe, as are its smaller, like-minded cousins, the [[{{MechaMooks}} Quads]]. On top of all that, ''[[{{BenevolentPrecursors}} the Luminoth]]'' [[{{BewareTheNiceOnes}} created it.]]
* The new weapons made available to Samus certainly qualify. First off, the beams are pretty insane. There's the Dark Beam and the Light Beam, both of which are obtained relatively early, and both of which are potentially devastating weapons. The Dark Beam has the power to freeze a target in a chunk of ''solid darkness''. As in the stuff the '''''ING''''' consist of. When charged, it sends off a massive chunk of solid darkness that has a better chance of freezing stuff. The Light Beam has the power to set anything on fire. When charged, the Light Beam essentially becomes a shot-gun that fires tiny suns. One person should not be allowed to have both weapons.
** The fourth beam-weapon you get, the Annihilator Beam, is ExactlyWhatItSaysOnTheTin. The in-game description states that its shots consist of a mix of matter and antimatter, essentially making it controlled chaos in a gun!
** The Missile Combos are even more disturbing. The Sunburst is the Super Missile for the Light Beam, that fires a single slightly bigger orb of light that explodes and damages everything within range. The Darkburst is the exact opposite, in that it fires a single huge chunk of darkness that explodes and either kills the enemies or drags them into a nightmarish dimension whose atmosphere will swiftly kill them. And then there's the Missile Combo for the Annihilator Beam... It is so powerful that it breaks the universe itself. And you can just get away with using it against the planet's native wild-life.
** And don't think Nintendo didn't anticipate that you would set stuff on fire with the Light Beam. Unlike the Plasma Beam in Prime, you actually get to hear the enemy scream in pain as they burn to death.

!Metroid Prime 3 Corruption:
* The Game Over screen for this game consists of a slowly expanding pool of Samus' blood on a white background. If that's not enough, if you get [[NonStandardGameOver Terminal Corruption]], the blood is ''[[AlienBlood blue]]''.
** [[SentientPhlebotinum Except that isn't just blue blood...]]
* ''Corruption'' adds the [[GhostShip GFS Valhalla]], complete with [[ApocalypticLog logs of the Aurora unit slowly being corrupted with Phazon]].
** What makes the Valhalla even creepier is that you don't encounter much life on the ship: Aside from mutated Metroids and the occasional Phazon-mutated creature, all you have to keep you company are the mangled corpses lying in various states of agony, creepily quiet music, and the occasional shuddering of the structurally unsound ship.
* You can use the scan visor on corpses to determine how they died. While you can do that in multiple places, the death messages are creepiest in the Valhalla. One of them saying that the trooper was trying to crawl towards the exit before being attacked from behind, but there are probably far worse "gems".
** Some deaths include getting impaled with a scythe before being tossed into exploding canisters, a PED malfunction eating a Trooper alive, phazon grenades, explosive decompression due to broken visor, self-inflicted and friendly fire while trying to remove Metroids, and getting attacked through walls by phase-shifting Metroids.
** Two of the last trooper corpses you find in the Valhalla belong to two PED Troopers whose PED devices explosively ruptured; when you find them, their corpses are impaled and suspended from the Phazon tendrils, looking almost as if they were crucified. Worse still, scans reveal that the Phazon is consuming their flesh, and shooting the two troopers reveals that there's nothing left inside their armor.
* Oh, did we forget to mention that these Metroids can now phase through walls? Because ''they can now phase through walls.''
* Whatever you do, don't look out the windows of the Valhalla; that entire nebula out there? Metroids as far as the eye can see, some of them MASSIVE.
** Particularly freaky is when you see one of these Metroids floating lazily down a hall...and then you notice that it's dragging a corpse behind it.
** To add to the effect, after a certain point bright flashes near you allow you to see [[spoiler: [[http://36.media.tumblr.com/015bd89a81cf7471652819db009560c3/tumblr_mzxgexAiZP1tp2bino1_500.jpg your own Phazon-corrupted face]]]]. Considering that at that point you've already seen what the stuff does to [[UnstoppableRage Space Pirates]] and your [[GrandTheftMe fellow bounty hunters]], you might be a bit more careful with the Hyper Mode. [[GameplayAndStorySegregation Not that it matters, of course.]]
* Then there's the part where you open a door, everything's fine, everything's good. '''Then the second you open the door a dead Pirate's corpse greets you and instantly decomposes'''!
*** The fun doesn't stop there: If you've played to the end of ''VideoGame/SuperMetroid'' before, as you'll probably recognize exactly ''what'' caused the Space Pirate to decompose: having its life sucked out by at least one Metroid.
** Then when you investigate further, you find ''dozens'' of these drained Pirate corpses littering every passageway, and you can learn the gruesome details of how each one died. Heck, you can even see the ''claw marks'' that one of the Pirates left in the wall in his dying moments.
* Venturing deeper, you pass by several trapped Metroids, but they do nothing, as they are properly contained. Then you acquire the Seeker Missile, the lights go out, and you KNOW what's waiting for you on the way back. And if it's your first run, PRAY!
* Then you learn that this mutated breed of Metroids can not only phase through walls, but ''missiles'' as well.
* The BodyHorror Samus experiences thanks to the Phazon in her body. First, there's the FacialHorror; as her corruption progresses, she gets TaintedVeins on her face, along with a combination of GlowingEyesOfDoom and BlackEyesOfCrazy. Also, after defeating the first Leviathan guardian, Samus keels over and pukes up a mess of radioactive sludge, ''[[VomitIndiscretionShot on-screen]]''. Finally, if you use Hypermode for too long, you get a NonStandardGameOver in which Samus becomes an exact copy of Dark Samus.

* After [[spoiler:Gandrayda]] is defeated, she goes through a ShapeShifterSwanSong, finally settling on Samus' form. As Dark Samus appears to absorb her the way she did [[spoiler:the last two bounty hunters]], Samus knows there's nothing she can do to help [[spoiler:Gandrayda]], and essentially goes through the epic mindfuck of watching ''herself'' die horribly. Even worse is that Samus herself is pretty corrupted by this point, and the dying [[spoiler:Gandrayda]] shows her just how corrupted she's become.
* Omega Ridley is pretty horrifying in ''concept''; he's a [[NinjaPirateZombieRobot sadistic cyborg space pirate dragon-like alien pirate/terrorist]], and you can clearly tell that Ridley himself is pretty much just a ''living corpse'' under the cybernetic enhancements. Even as a cybernetically-enhanced corpse, he still takes a large amount of effort to put down, and even ''after'' Samus defeats him again, the zombie cyborg Ridley manages to escape the destruction of Phaaze.
* ''Corruption'' also features a sort of Fridge Nightmare Fuel. In the first one, Phazon damaged you until you had the Phazon suit. Even then, the stuff in the impact crater still damaged you. In ''Echoes'' there was no protection against it, it would always damage you. But after you get the PED suit, Phazon can ''heal'' you. It is some of the most toxic and corrosive stuff in the history of the series, and it's '''healing''' you. That's how corrupted you are. To drive the point home, the energy refills change after you get the PED suit. Before you get the suit, scan data shows that the energy pick ups refill X amount of energy. After you get the PED suit, they now change into phazon energy and scanning them says you'll get X amount of phazon back as if you're feeding off the corrupted stuff to stay alive.
* Phaaze is pretty much a planet made out of NightmareFuel. Before going there, you are only 75% corrupted, and your ship can still sense that it's Samus that tries to use its facilities. Once you land on Phaaze, there is a quick cut-scene in which [[spoiler:Samus becomes fully corrupted. As a result, her own ship can't even sense that it's her anymore, and to make matters worse, you're stuck in infinite Hyper Mode]]. On the bright side, you can't die due to lack of Energy. On the not so bright side, [[spoiler:your 100% Phazon-Corruption-rate means you're only one step away from dying every second, meaning the atmosphere and any hostile attacks can actually kill you if you're not careful. And since your ship doesn't recognize you, you're stuck on that planet until you slay Metroid Prime/Dark Samus for good. Playing this part of the game right before sleeping is not a good idea if you actually want to sleep]].
* The Aazelion, a creature found on Phaaze, is the page picture for good reason. In one of the last rooms on the planet before the final boss, Samus falls down a shaft... and is suddenly ensnared by the Aazelion, which slowly drags Samus towards its mouth in an attempt to eat her. To add fuel to the nightmare, the Aazelion is one of the few creatures in the trilogy that has no records in Samus' Scan Visor; it's essentially a GiantSpaceFleaFromNowhere.
** After killing the Infant Leviathan in the Genesis Chamber and before jumping down the final shaft, take a look around with the Scan Visor. You'll see some weird looking growths along the wall and, naturally, will want to scan it. [[spoiler: Those aren't growths. They're husks. '''''METROID PRIME HUSKS''''']].
* One of the cooler features of the game is the ability to sometimes see Samus's eyes inside her visor while playing. As you become corrupted, her eyes go from Green( non-ped suit), to blue, to blue with some strained blood vessels, blue with [[spoiler: glowing eyes]], and finally [[spoiler: deep blue glowing eyes, with ''tendrils made of pure phazon crawling up her face!'']]
* TheStinger ends the game, and by extension the trilogy, on an ominous note. After reminiscing about her fallen comrades, Samus leaves Elysia, heading off for more adventures. [[spoiler: [[TheEndOrIsIt Mere seconds later, a sleek, blue and green ship slowly and quietly hovers into view, engaging its engines before jumping after Samus.]]]] After years of speculation, [[http://www.ign.com/articles/2015/06/17/e3-2015-what-metroid-primes-producer-wants-in-the-next-sequel?utm_source=IGN+hub+page&utm_medium=IGN+%28front+page%29&utm_content=5&utm_campaign=Blogroll it's since been confirmed]] that it was none other than [[spoiler: Sylux. You know, the one who wants to burn the entire Galactic Federation to the ground out of sheer hatred? [[ParanoiaFuel He has been known to successfully shadow Samus, after all]]]]...
!Metroid Other M:
* ''VideoGame/MetroidOtherM'' has some good scares, but the best one is retroactive. Throughout the game, you've been encountering distinctive Power Bomb doors; you've probably been looking forward to coming back and opening them all. Then the cinema before the final fight reveals that [[spoiler:those aren't doors -- they're dormant insectoid cyborgs strong enough to kick your ass]]. Next time you play, good luck passing one without shuddering...
* Another one from ''Other M'': At one point, you're running through a big glass tube thing. Suddenly midway through, the game goes all Matrix-y and a giant worm monster attacks, shattering the section of tube you're in. You're supposed to dodge the thing to survive, but on the first run through, it scared the crap out of me.
* What about ''Other M'''s reshowing of Mother Brain's OneWingedAngel form? She was scary enough in ''2D!''

!Metroid Prime Federation Force:
* Remember the [[spoiler: Metroid egg]] that the Project Golem squad retrieved? TheStinger reveals that [[spoiler: someone broke into Federation HQ and has made off with the newly hatched infant Metroid, and that someone is most likely Sylux]].

* As if Metroids weren't scary enough already, [[http://kalapusa.deviantart.com/art/Metroid-Physiology-163288849 this picture]] makes them look like halfway realistic animals... and the accompanying description of death by Metroid will make your skin crawl.
* Samus' [[HeroicBSOD mental breakdown]] in the manga is pretty terrifying.
** Not to mention Ridley's [[WouldYouLiketoHearHowTheyDied cruel description]] of how he devoured the flesh of all of Samus's loved ones. Just merely saying that is horrifying enough, but Ridley goes further by taunting her of where her mother's cells could be. It's no wonder that Samus fears only him.
-->'''Ridley:''' You don't know. [[KickTheDog Maybe I even ate your "mama" so that my cells can live, hm?]] Is she here -- or here?! '''AT LEAST PAY YOUR RESPECTS!'''
* Hell, Ridley in general's pretty scary; he's a freakin' ''near-unkillable draconic space terrorist'' (hell, it takes an ''planet-scale bomb'' to actually kill him), and also [[ItsPersonal murdered Samus' parents in front of her]], making him an ''extremely'' frightening foe, and he's certainly one of Nintendo's most sadistic villains (he takes a cruel delight in ''describing the exact way he killed the parents of his archnemesis, after all'').
** [[spoiler: This aspect of Ridley is definitely played up in the E3 trailer showing his debut in Super Smash Bros. Ultimate. It shows Samus, Mario, and Mega Man on a small platform bridge that's in a pitch dark room. At first nothing seems to happen.... and then Mega Man gets taken by Ridley and GRAPHICALLY SHOWN TO BE IMPALED ON HIS TAIL. Then next up is Mario that Ridley seems to take his sweet time CRUSHING HIS SKULL. And finally.... well we don't see Samus's fate but she's CLEARLY terrified. And then he catches Mario's hat and twirls with the mother of all [[Main/SlasherSmile Slasher Smiles]] on his face.]]
* [[VideoGame/MetroidPrimeHunters Sylux]] is one of the biggest mysteries in the series and what is known about him does not paint a pretty picture. His first onscreen appearance consists of slaughtering a Federation squad while giving a decidedly ''inhuman'' roar, his equipment consists of nothing but stolen experimental GF tech, and he holds an unfathomable HATRED for the Federation to the point where he wants to burn it all down. This seething grudge even extends to Samus by ''mere association'' and he has successfully been shadowing her for quite some time, [[spoiler: as shown by TheStinger to ''Corruption'']]. Nobody, in-universe or out, [[TheGhost knows just who or what he is or what his plans are]], [[spoiler: and if he truly was the culprit at the end of TheStinger for ''Federation Force'', he now has [[UltimateLifeform an infant Metroid]] in his possession]].
* [[TimedMission TIME BOMB SET--GET OUT FAST!]]