Line #9 Main/DropInNemesis


1	The Drop-In Nemesis is triggered when you do a certain thing in a particular video game setting. Suddenly, a bad guy or environmental obstacle enters the scene (often by OffscreenTeleportation) and wastes no time in killing you. Paralyzed by CutsceneIncompetence, you have no option but to stand there helplessly as you are put out of your misery. Apparently, whatever you did was the wrong thing, in the eyes of the bad guy and of the game designers. HaveANiceDeath!
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3	For an enemy to be a true Drop-In Nemesis, there shouldn't be blatant warnings (like the sound of the monster's approaching steps or that it is one moment away from coming to eat you/stab you/shoot you/zap you with a spell), giving you a chance to hide. You are more typically given vague and misleading warnings that the enemy could be passing through/returning to the area at any unexpected time. This won't be so unexpected when you've been killed by the villain every time after performing the trigger action.
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5	This trope includes vehicles which only appear to get the player into deadly highway accidents.
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7	This whole scenario borders strongly on ParanoiaFuel: as if environments filled with EverythingTryingToKillYou weren't enough, there are things hiding offscreen that you can't see coming until they're the last thing your character will ever see.
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9	Compare TeleportingKeycardSquad, GiantSpaceFleaFromNowhere, and EasilyAngeredShopkeeper (Stealing is bad!). If they serve to prevent you from going OffTheRails, they are BorderPatrol.
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11	If you were expecting an article on videogame bosses that drop from ceilings, you may be looking for HeWasRightThereAllAlong or AmbushingEnemy.
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13	!!Video Game Examples:
14	* ''Air Buccaneers'' features invulnerable murderous mushrooms that sprout from the ground and will lunge at you -- thus making the ground less safe than the air, where you're barraged by cannonballs, scorched by flamethrowers, or stabbed by vicious boarding parties.
15	* ''VideoGame/{{Zork}}'' gives us the famous example: @@''Oh, no! A lurking grue slithered into the room and devoured you!''@@
16	* In the 1980s RPG ''Ragnarok'', you can use a potion of phasing to walk through the walls of the game map. If you make it out to the edge, there's nothing but sea ... and then Jormungand eats you.
17	* ''VideoGame/WithinADeepForest''. If you try to jump across the water at the far right of the forest, a dragon's head pops out from offscreen and eats you. [[spoiler:You need to travel to the BadFuture, where the dragon is long dead, to get across.]]
18	* Early ''VideoGame/ClockTower'' games did this. Decide to play the piano loudly? Say hello to Bobby literally dropping right in!
19	* The evil wizard Manannan had a bad habit of showing up at any time in ''VideoGame/KingsQuestIII'' -- ''no matter where you are in the world'' -- and killing you on the spot if you gave him even the tiniest excuse. If you left his mountain, or were carrying anything that could be used as a magical ingredient and/or couldn't be picked up in his house, or forgot to cover your tracks, he'd zap you. It felt damn good to finally dispose of him.
20	** The sorceress in ''VideoGame/KingsQuestVII'' performs a similar function.
21	** And Mordack in ''VideoGame/KingsQuestV''.
22	** The Minotaur in ''VideoGame/KingsQuestVI''. Worse, he appears if you ''don't have the right item'' in your inventory when you enter a required room -- but it's one of the items you can't backtrack to obtain once you've entered his labyrinth. And if you do have the item, it lets you ''spy on him as he fiddles around in a different room entirely''.
23	** The Dwarf in the original, although it didn't kill you, would steal your treasures, rendering the game {{unwinnable}}.
24	** I and II also had the Enchanter and Ogre who will show up randomly on certain screens and kill you if they get too close.
25	* ''Franchise/SuperMarioBros'':
26	** ''VideoGame/SuperMario64'': Done very literally in the Tiny-Huge Island level. If Mario spends too much time in the two bodies of water that exist there, an InvincibleMinorMinion known as Bubba will be dropped from the sky into the water and attempt to gobble Mario up.
27	** ''VideoGame/PaperMarioTheThousandYearDoor'', you're at one point given a diary by a ghost and told not to read it. If you read it anyway, the ghost reappears and kills you on the spot.
28	** ''VideoGame/SuperPaperMario'': Consider that [[spoiler:Dimentio spontaneously appeared in Merlon's house, interrupting a conversation, to [[TotalPartyKill kill your entire party.]] Shortly after doing the same thing to Luigi]]. The unsaid implication is that, if he wanted to, he could have done that ''at any time, in any stage''...
29	* In ''VideoGame/LeisureSuitLarry1InTheLandOfTheLoungeLizards'', if you try to cross the street, a car will appear out of nowhere and flatten you. And if you wander into a dark alley, a thug beats you to death.
30	* ''VideoGame/GabrielKnight: Sins of the Fathers'' has a nice example of this scenario: regularly, the Voodoo Museum is a safe place, but entering on a certain day causes Gabe to have a potentially fatal run-in with a constrictor snake.
31	* ''VideoGame/IWannaBeTheGuy'':
32	** One screen is an apparently safe hallway straight out of ''VideoGame/MegaManClassic''. You must clear it quickly or else Guts Man will fall on you from out of nowhere. But [[PlatformHell nobody said this game was fair]]. If you take too long on the Tetris screen, a giant VideoGame/DrMario pill falls on you.
33	** Part of the game's TrialAndErrorGameplay is that anything and everything could pop up out of nowhere to kill you at anytime, from [[Franchise/StreetFighter Ryu]] spin-kicking out of a BottomlessPit, to the moon dropping on your head, to an ''error message'' appearing and then falling down and crushing you.
34	** In one part of ''VideoGame/IWannaBeTheFangame'', the punishment for taking the easy way is death by [[WebAnimation/TheDementedCartoonMovie kamikaze watermelon]].
35	* In the original ''VideoGame/JurassicPark'' game for the SNES, entering a darkened room without night vision goggles will result in your immediate death-by-unseen-dinosaur. There are also several spots on the world map where stepping into the wrong location will cause a T-Rex to suddenly appear and eat you.
36	* ''VideoGame/LauraBow'':
37	** In ''The Colonel's Bequest'', [[PsychoShowerMurderParody taking a shower resulted in a homage to the infamous murder scene]] from ''Film/{{Psycho}}'', complete with the MIDI version of PsychoStrings.
38	** In ''The Dagger of Amon Ra'', Laura will get run over by a car if she tries to cross the street by herself. Hilariously. Every damn time.
39	* Less deadly, but lacking in any particular trigger (and still seeming like a "Drop-In Nemesis"), is Dr. Goldfire, the MadScientist BigBad in ''VideoGame/BlakeStone''. He eventually shows up as a normal boss on the ninth level of each episode, but occasionally teleports in from nowhere on one of the first eight levels, teleporting back out (and apparently healing any damage he takes) after you shoot him a few times. Yes, the '''main villain''' acts as a {{random encounter}} in a ''FirstPersonShooter'', a genre that doesn't '''have''' random encounters. Of course, being the type of villain to normally rely on his genetically modified monsters and other guards, he's only armed with a pistol, so he's more of a nuisance than an instant death.
40	* ''Franchise/ResidentEvil'':
41	** A literal case of this is Nemesis in ''VideoGame/ResidentEvil3Nemesis'', who has the habit to pop out in random corridors to chase Jill down. Sometimes even right outside a safe room, much to many a player's surprise.
42	** Also literally used in ''VideoGame/ResidentEvilGunSurvivor 2'', where Nemesis chases you down and kills you in one hit once the timer runs out.
43	** ''VideoGame/ResidentEvil2'', in the form of the T-103 Tyrant, AKA Mr. X, who is literally dropped into the police precinct via helicopter during the second character's story arc, and [[JumpScare bursts into the room without any forewarning]] on multiple occasions as he [[ImplacableMan relentlessly hunts for the G-virus sample]].
44	** In ''VideoGame/ResidentEvil4'', shooting a couple of bullets into the lake while standing on the end of the dock results in Del Lago leaping out of the water and eating the whole dock!
45	* This happens a couple of times in games based on ''Franchise/IndianaJones''.
46	** In ''VideoGame/IndianaJonesAndTheInfernalMachine'', after exiting the third boss's lair, Indy steps [[CutsceneIncompetence uncontrollably]] into a trap and is captured by [[MorallyAmbiguousDoctorate Dr.]] [[DirtyCommunists Volodnikov]].
47	** In ''[[VideoGame/IndianaJonesAndTheEmperorsTomb Emperor's Tomb]]'', Indy gets gassed into unconsciousness and captured by [[ThoseWackyNazis Colonel von Beck]] immediately after obtaining the second MacGuffin. Both serve as excuses to get Indy into a CardboardPrison located conveniently near information on where the next MacGuffin can be found.
48	** In the NES version of ''Indiana Jones and the Temple of Doom'', running out of time results in Mola Ram dropping in and tearing out Indy's heart.
49	* Both orcs and elves (as well as Gollum and a mysterious tree-dwelling monster) made appearances in the old text-based game of ''VideoGame/{{The Hobbit\|1982}}''. Whether you could escape before they attacked seemed to be random (except the monster, which could be eluded only by a specific set of commands). The wood elf, although he only captured Bilbo rather than killing him, also tended to capture orcs and vicious wargs, or even [[EldritchAbomination the Balrog]], and send them to the same prison cell.
50	* ''VideoGame/PuzzlePirates'' has the Black Ship, a nigh-invincible NPC ship that punishes players who try to pick on far weaker opponents. It takes the place of your opponent in battle to beat the crap out of you and take nearly everything on your ship. [[LordBritishPostulate It has been defeated a handful of times, being made stronger by the developers after each defeat.]]
51	* There are several of these in [[VideoGame/ThayersQuest Shadoan]], and most have a different way of [[TheManyDeathsOfYou insta-killing you]], with the result of TrialAndErrorGameplay.
52	* Most (probably all) BeatEmUp arcade games have a hidden timer that will instantly kill you if you sit idle for too long, or take too long to finish off a boss. (See also StalkedByTheBell.)
53	** ''VideoGame/SpiderManTheVideoGame'' and ''VideoGame/XMen1992'' (bombs drop on your head)
54	** ''D. D. Crew'' (the BigBad knocks you out)
55	** This happens literally in ''VideoGame/ZombieRevenge'' if the timer runs out. A demon you'll never see anywhere else in the game, suddenly appears in the room, says something unintelligible, waves his arms, and suddenly a big, blue explosion rocks everything, causing everybody to lose a life. It's made even more jarring by the fact that afterwards, you're right back in the exact situation you were in before he showed up, as though he somehow ''aimed'' the explosion.
56	** ''VideoGame/BattleZone1980'' kills you with a homing missile if you go too long without killing anything.
57	* ''Franchise/SilentHill''
58	** In ''VideoGame/SilentHill1'', you encounter a kitchen cabinet tied with a chain and a dagger stuck in it. If you remove the dagger and try to leave without using a ring picked up earlier to secure the chain, a couple of tentacles will suddenly emerge from it and kill you instantly in a cutscene. There's no warning given beforehand, of course.
59	** The sewers of ''VideoGame/SilentHill3'' have a monster that kills you instantly if you try to cross a certain bridge, unless you electrocute it by throwing a hair dryer in the water. Then there's the roller coaster in the amusement park that always runs you over unless you turn it off (it turns itself back on, but Heather jumps off just in time).
60	* ''[[VideoGame/DejaVu1985 Déjà Vu II]]'':
61	** [[TheDragon Stogie]], a supremely annoying mob goon who will magically appear to kill you should you try to stray out of town. He doesn't seem to care where you are at the time, either. Trying to ride a train out? He hopped on too. Trying to escape through the desert? No good, he's right there to get you.
62	** A non-lethal example: The first game had a mugger that beat you up and [[BagOfSpilling took your cash]], though there's also an armed mugger that will kill you if you don't give him your money...or just punch him in the face, but that only works so many times.
63	* In the original ''VideoGame/{{Space Quest\|I The Sarien Encounter}}'', attempting to read the data cartridge on the library computer causes a Sarien to immediately pop in and blast you, the desert of Kerona has {{sand worm}}s that devour wanderers, looking into the hole in the cliff gets you StrippedToTheBone, walking across the grate gets you pulled through the and eaten, and wandering around the Deltaur's exterior gets you blasted into space dust. In ''VideoGame/SpaceQuestIIVohaulsRevenge'', if you go into the cliffside cave without the glowing gem, you get eaten by a Cave Beaver. If you fail to deactivate the hovercraft's distress beacon, Vohaul's troops will eventually track you down and kill you with a DisintegratorRay; the same thing happens if the landing platform guard spots you. If you go the wrong way in TheMaze, you get eaten by a Cave Squid. ''III'' has Arnold the Annihilator, who you must lure into a trap to obtain his InvisibilityCloak, and the Scumsoft Henchmen, who will trap you in a block of Jello if alerted. ''IV'' has the Cyborg who summons the inescapable Droid of Death, the Sequel Police, who will shoot you dead if you take a wrong turn, and the Super Computer security bots, which in addition to patrolling the complex, will immediately hunt you down if you mis-enter the code for the control room door.
64	* ''720 Degrees'' has the "Skate or Die" killer bees that chase you down and kill you after the timer expires.
65	* If you touch any of the ghosts in ''Videogame/AloneInTheDark1992'', they will come to life and chase you down, killing you instantly. Other instant-death nemeses include the De Vermis Mysteriis book, the EldritchAbomination / ManEatingPlant guarding the front door, and the giant worm (Chthonian) in the catacombs (if you enter them from the basement).
66	* In the game of [[Literature/GreenSkyTrilogy Below The Root]], there are some random [=NPCs=] that show up on certain screens. Running into them will lead to your character being captured and put in a prison house by one of two renegade factions opposed to Green-Sky's unification, or roughed up and sent back to your home with an ominous "you were found unconscious," and a day of game-time lost.
67	* ''VideoGame/PoliceQuest'':
68	** In the original Police Quest, if you don't do a search on your police cruiser, it will be booby trapped and kill you. If you do, you'll find nothing wrong and the game continues normally. Wrap your head around that logic... Additionally, you must put your gun in the locker outside the jail before uncuffing a suspect, or he will turn it against you.
69	** Enter the BigBad's apartment in ''Open Season'' without first looking through the door with a [[GuideDangIt MacGyvered stick mirror]], and his dog will maul you to death. Later, he unavoidably knocks you out and empties your pockets. At this point, don't go back into the bedroom without first equipping the [[KillItWithFire lighter and hairspray]].
70	** In the first ''SWAT'' game, go around a corner without slicing the pie and the criminal will [[FailedASpotCheck ALWAYS be waiting there to shoot you]]. Worse yet, incorrectly planning your entry as Element Leader on the Eastman Enterprises mission [[PressStartToGameOver results in your team immediately being gunned down]].
71	* In ''VideoGame/AlexKidd in Miracle World'', the GrimReaper appears out of specific ? blocks, in addition to being triggered by pink skull blocks. Avoiding the ? block he's scheduled to appear in simply shifts him to the next available one, replacing the item normally within. If he appears, the only ways to escape are to scroll him off the screen or make too many other sprites appear (money, items etc), forcing the game to erase him to make room for the newest sprite. If it happens to be in a bonus room, there's no escape.
72	* On ''VideoGame/TheAdventuresOfRadGravity'''s second planet, if you fail to retrieve [[RobotBuddy Kakos]] from the ConveyorBeltODoom, he turns into a KillerRobot and kills you.
73	* In ''[[VideoGame/{{Berzerk}} Frenzy]]'', if you shoot Evil Otto in the room with the giant version of Otto, a swarm of Ottos appears and instantly kills you.
74	* In ''VideoGame/UnterwegsInDuesterburg'' in one dungeon is a sword in a stone next to a LavaPit. If you choose to take it, a giant hand comes out of the lava and kills you. Considering this happens in a dungeon [[EverythingTryingToKillYou full of deadly traps]], you could've seen it coming.
75	* The titular ''VideoGame/AoOni'' likes to pop up both when you ''might'' expect him, such as when you've just discovered a vital item or clue, and when you're just wandering around his house. Typically, you can survive by outrunning him, or trying to hide in a cabinet... though it's not a good idea to try that while he's in the room. Another example happens when you pick up a certain key in the basement. If you don't close the door behind you, he will rush you with no chance to move. [[https://www.youtube.com/watch?list=PLC9D32F394B208634&feature=player_detailpage&v=UnT7YPVfg5U#t=3s See it here.]]
76	* In ''VideoGame/KickleCubicle'', running out of time would result in Striker, a big yellow star, swooping in for an almost instant kill.
77	* In ''VideoGame/BaldursGateII'', if you kill a plot-central character during the opening few acts, an invincible assassin named Arkhanis Gath will appear and gib you.
78	* In ''VideoGame/{{Dreamscape\|2010}}'', an UsefulNotes/RPGMaker game from Creator/AldorleaGames, these appear often such as a bunch of guardian trees electrocuting you if you get too close or Jack the Ripper murdering you if you step into the wrong areas in Victorian London.
79	* In ''[[Creator/ZapDramatic Ambition]]'', you'll get [[spoiler:the mysterious murderer coming back, causing Ted to accidentally shoot you]] if you pick the wrong answer in the parking lot, and [[spoiler:Ted cutting off the Courtroom's light supply]] if you ask [[spoiler:Duke]] about his notebook on the last day of the trial.
80	* The antagonist wizard from ''VideoGame/ATaleOfTwoKingdoms'', who has been watching you by crystal ball, [[spoiler:but this will stop if you sneak into his house and break the ball.]]
81	* Spend more than five days on your mission in ''VideoGame/PathwaysIntoDarkness'', and the W'rkncacnter awakens and causes TheEndOfTheWorldAsWeKnowIt.
82	* ''VideoGame/EtrianOdysseyIVLegendsOfTheTitan'': In each mainland except Cloudy Stronghold, one of the Elemental Dragons will periodically start soaring around, and its motion and speed per step make them difficult to dodge. And if the party gets caught by it, the Elemental Dragon will shoot down their skyship, making them respawn in Tharsis with only 1 HP per character left and all food lost. Luckily, if the party manages to evade the monster, it will leave after a while and the mainland will be safe once again. The Great Dragon appears in Windy Plains, the Storm Emperor appears in Scarlet Pillars, and the Blizzard King appears in Snowy Mountains. During the PlayableEpilogue, there will be sidequests that require performing tasks while the dragons soar, which further increases the difficulty (since the dragons will ''not'' leave the mainland this time); but once those sidequests are completed, the dragons can be finally challenged in {{Superboss}} battles.
83	* ''VideoGame/{{Fallout}}'':
84	** In ''VideoGame/{{Fallout 3}}'', heavily-armed hit squads will be sent after you if your reputation is either [[KarmaMeter too high or too low]]. If you fast-travel to one of their spawning locations, they will appear in a scripted encounter and immediately open fire on you. If you're at a low experience level, your chances of survival are slim.
85	** ''VideoGame/FalloutNewVegas'' has a similar system based around factions instead of karma: if you've pissed off either the NCR or Caesar's Legion (or both) enough, they'll send the occasional hit squad after you.
86	** ''Lonesome Road'' has a literal example where if you enter a trailer on the High Road, a Deathclaw, which in this DLC is an InstakillMook that level scales with the player, drops down from the overpass and lands near the trailer entrance, likely inescapably trapping the player.
87	** In ''VideoGame/{{Fallout 4}}'', if you decide to explore the shed near the swan boat pond in Boston Common, a [[LightningBruiser Super Mutant Behemoth]] named Swan will emerge to smash you with thrown boulders and a giant anchor hammer. If you don't have PowerArmor and a Fat Man on hand, or a lot of levels on you, [[CurbStompBattle you're dead meat]].
88	* In ''VideoGame/UnrealI'', dropping into the arena in the SP level "Dark Arena" will [[spoiler:cause a Titan to break through one of the stone gates. Enter the first proper boss fight of the game!]]
89	* In the ''{{VideoGame/Marathon}}'' {{game mod}} ''Infection'', taking the wrong level exit drops you in an inescapable LavaPit.
90	* In ''VideoGame/QuestForGloryI ''. If you sleep anywhere that isn't the Hero's Tail Inn, Erana's Peace, or The Dryad's grove. You will be killed by a Night Gaunt, which no-one, not even characters in the games know what it actually is.
91	* The notorious demon-monster thing from ''VideoGame/SkiFree'', that would come out of nowhere and eat you if you went too far.
92	* ''VideoGame/BakuBakuAnimal'' has the lion that crushes losing players in its jaws. Only with a continue will they be spared.
93	* There's a number of things you can do in ''VideoGame/PlanescapeTorment'' to get the attention of [[TheDreaded The Lady of Pain]] (trying to worship her, committing wanton murder, etc.) The first time, you'll just get dumped into an extradimensional maze, but the second time, you're not getting out alive, immortality be damned.
94	* This is practically the entire premise of ''Franchise/FiveNightsAtFreddys''; letting your guard down for a single moment can easily result in one of the killer animatronics slipping in unnoticed, ready and waiti--'''[[JumpScare EEEEEAAAAAHHHHHH!]]'''
95	* The shareware version of ''Combat Tanks'' spawns the invincible and inescapable Death Chopper [[StalkedByTheBell after playing a certain amount of time]].
96	* In ''VideoGame/ColdFear'', [[EscortMission Anna]] dying results in a brief cutscene where Tom [[SayMyName shouts her name]] and [[NonStandardGameOver is promptly thwacked by a monster from behind]].
97	* In ''VideoGame/OriAndTheBlindForest'', Kuro will immediately OneHitKill you if you fall in the Valley of the Wind while climbing up to distract her with a boulder, or if you remain out in the open too long while she's stalking you after the Forlorn Ruins or during Mt. Horu's EscapeSequence.
98	* In ''VideoGame/OriAndTheWillOfTheWisps'', once Ori steps into [[DarknessEqualsDeath the darkness of Mouldwood Depths]], he only has a few seconds to [[CorridorCubbyholeRun run to a light source]] or activate the Flash spell before [[SoundOnlyDeath an unseen entity kills him]].
99	* In ''VideoGame/TheLegendOfZeldaBreathOfTheWild'', [[TheVeryDefinitelyFinalDungeon Hyrule Castle]] has two Gatehouses on the middle level of the structure on the path leading to the Sanctum. If Link walks into them, the gates will slam shut and a Lynel will suddenly appear to attack.
100	* In ''VideoGame/{{Fe}}'', being spotted by a Silent One spells doom for the furry protagonist unless they quickly get out of sight. Also, certain bodies of water are home to a fish that immediately swallows Fe whole if they fall in.
101	* In the original Japanese home computer versions of ''VideoGame/{{Valis}}: The Fantasm Soldier'', picking up a power-up when you have [[CastFromHitPoints insufficient HP]] results in the message "[[CheatersNeverProsper Ill gotten goods never prosper!]]" and a swarm of flying squid [[CurbstompBattle projectile-spamming Yuko to death in seconds.]]
102	* ''VideoGame/UltimaVIII'': Breaking the law in Tenebrae will cause the town sheriff Beren to teleport in right next to you and to graphically blow you to pieces, NoSavingThrow allowed.
103	* In ''VideoGame/RedDeadRedemption2'''s story mode, players who evade the BorderPatrol in West Elizabeth will immediately be shot dead by an invisible assassin upon crossing into New Austin.
104	* Several of ''VideoGame/MonsterHunter'''s eponymous beasts like to do this:
105	** The first example would be Deviljho of ''VideoGame/MonsterHunter3Tri'' fame, who is known for burrowing up from underneath the ground in search of food and proceeding to [[PersonOfMassDestruction murder almost everything in the area,]] more often than not including ''you''. Its danger level makes the resulting BackgroundMusicOverride from its sudden appearance a serious red flag that your hunt quest will go south.
106	** Though Rajang almost never does this in the second-generation games (despite having debuted in ''VideoGame/MonsterHunter2Dos''), and outright never does it in ''VideoGame/MonsterHunter4'', it started doing it in subsequent appearances, from the UpdatedRerelease ''4 Ultimate'' onwards. In the latter game, it is the most recurring intruder among those powered by the Apex state, and is capable of appearing in such a dangerous form as early as when you're hunting a ''Desert Seltas'' (which would otherwise be a welcoming first boss in G Rank). Then, in ''VideoGame/MonsterHunterWorld Iceborne'', it can appear on any map and will [[HairTriggerTemper jump into the fray, fists flying, if it so much as]] ''[[HairTriggerTemper sees]]'' you or another monster, even an ''Elder Dragon.'' If [[BackgroundMusicOverride its theme starts playing]], one of you is about to have a ''very'' bad time. It's even worse in the Guiding Lands, since its patrols encompass ''almost the entire locale.''
107	** Introduced in ''VideoGame/MonsterHunter4 Ultimate'', Seregios flies in at high speed, with your only warning being the whistling its [[FeatherFlechettes scales]] make mid-flight, then [[DeathOfAThousandCuts pokes whatever's in the area to death.]]
108	** ''VideoGame/MonsterHunterWorld'':
109	*** If Bazelgeuse is on a map with you, it'll come running in search of a free meal if it hears the distressed cry of another large monster (which it can do from a surprisingly large distance due to its acute hearing.) Once its theme [[BackgroundMusicOverride overtakes the area's battle theme]], you'd best start running or get those [[DungFu Dung Pods]] ready, else you're in for an [[StuffBlowingUp explosive surprise.]] The frequency with which it does this is such that ''VideoGame/MonsterHunterRise'' gave it the title "Party Crasher".
110	*** Banbaro in ''Iceborne'' is normally a docile monster that can appear almost anywhere. If it sees you fighting another monster, however, it will ''[[BerserkButton flip out]]'' and start tossing boulders and dead trees at the both of you.
111	*** Ebony Odogaron and Fulgur Anjanath appear in all biomes. They usually thrash the resident apex monster of the region in a Turf War, however, so it's sometimes a relief to see them charging into the fray.
112	*** Ruiner Nergigante is constantly on the hunt for other Elder Dragons to chow down on, so it appears anywhere ''they'' can appear. It beats all of them in Turf Wars, so this can be used to your advantage; you just need to watch out for its spike attacks, which inflict [[StatusEffects bleeding.]]
113	*** On a lesser example, Tigrex and Velkhana can appear in all but one region (the Coral Highlands and the Elder's Recess, respectively) at any time; the latter, being an Elder Dragon, will [[CurbStompBattle ruin your prey's day]], while the former, being a hyperactive, aggressive Pseudo-Flying Wyvern, will normally ruin ''your'' day instead.
114	** Crimson Glow Valstrax in ''VideoGame/MonsterHunterRise'' is an Elder Dragon that appears as a red comet high in the sky, then comes [[DynamicEntry hurtling down to earth.]] It can appear in Unstable Environment quests. If you see a red light in the sky, and you don't take any evasive actions, you're about to learn firsthand that a giant dragon with jet engines for wings crashing into you at Mach 5 from the stratosphere hurts a ''lot''.
115	* ''VideoGame/{{Spore}}'' features the sea monster in the creature stage that swallows you in a cutscene without warning. It doubles as BorderPatrol as well as the page image for [[NightmareFuel/{{Spore}} the game's Nightmare Fuel]]. The Grox fill this niche in the space stage, randomly dropping in and torching both your allies' colonies and sometimes yourself unless you can drive them off in time. Note that TakeYourTime is [[AvertedTrope NOT]] in effect here.
116	* In ''VideoGame/{{Minecraft}}'', the [[DugTooDeep Deep Dark]] normally has no monsters spawning in it, despite the [[DarknessEqualsDeath darkness]]. However, triggering a sculk shrieker by either touching it or making noise within earshot of a nearby sculk sensor [[FourIsDeath four times]] will spawn a Warden, a NighInvulnerable LightningBruiser intentionally designed to be a HopelessBossFight ''even with endgame-level equipment''. Its only weakness is that it is blind and primarily relies on its hearing to find you, which can be exploited by sneaking and making decoy noises with thrown snowballs to draw its attention away from you... however, you will find that simply staying completely still is of no help, as it can also ''smell'' you and will slowly close in on you even if you make no sound at all. And once it has a good enough guess of your location to roar and give chase, '''you are dead''': in addition to its extreme toughness (more health than the actual final boss and ''more than even the {{Superboss}}'') and massive melee damage (enough to kill in ''two hits max'' even if you're wearing a full suit of [[{{Unobtainium}} netherite]] armor), it also packs an [[AlwaysAccurateAttack impossible-to-dodge]] ArmorPiercingAttack that bypasses almost all defenses and even go through walls.
117	----
118	!!Non-Video Game Examples:
119
120	* The ''Literature/FightingFantasy'' series of {{Gamebooks}} really likes doing this.
121	** In ''Literature/TempleOfTerror'', you spend most of the adventure searching for five dragon statues, preventing the Child of Darkness, Malbordus, from obtaining any of them (should you miss ''even one'' of the artefacts, you're immediately greeted with a NonStandardGameOver as Malbordus reveals himself with one of the dragons you missed, which is apparently enough to help him TakeOverTheWorld). Once you've gotten all five and are preparing to destroy them, Malbordus then shows up from out of nowhere for a final duel.
122	** ''Literature/IslandOfTheUndead'' have a small, dragon-like creature that gives you valuable information if you befriend it. But before the creature can reveal too much, a Stone Wight will show up from out of nowhere and crush it before attacking you. If you don't have the creature, you'll never encounter the Stone Wight even once.
123	** ''Literature/MasterOfChaos'', similar to Malbordus above, have most of the quest revolving between you and the Dark Elf warrior, Naas, trying to obtain a magical staff from an evil wizard. If you slay the wizard in combat, you're allowed a short break to regain some STAMINA points... before Naas teleports into the slain wizard's room to challenge you to another duel.

Context Main / DropInNemesis