History TrappedInAnotherWorld / FanWorks

* ''Fanfic/{{Metro}}'': ZigzaggedTrope. Mads and Thomas are from AnotherUniverse, specifically, the ''TabletopGame/{{Shadowrun}}'' universe, and effectively also have YouCantGoHomeAgain, as while they ''can'', they wouldn't be given a warm welcome if they made it.

* In crossover fanfiction ''Fanfic/{{Displaced}}'', Spider-Man is dropped off in the DC Universe with no apparent way to return home.
* ''FanFic/DungeonKeeperAmi'' features this prominently -- with something of a twist. The Light Gods are capable of sending Ami back at any time, and Ami is aware of this fairly early. However, due to Ami's unfortunate bonding with a Dungeon Heart, they refuse to do so. Rightly so -- if she returned to her world with a Dungeon Heart, she would inadvertently draw the Dark Gods after her. The story evolves around her attempts to discover a way around this.

* Many ''Franchise/BlazBlue'' characters are trapped in the world of ''VideoGame/FireEmblemFates'' in the Fanfic, ''Fanfic/FireEmblemFatesCalamity'', and have all been stuck there for five years. To top it off, many characters, such as Ragna, Noel, and Bang, are all suffering from a case of WistfulAmnesia and don't remember their old world, believing themselves to be inhabitants of the ''Fates'' world.
* At the start of ''WebAnimation/FreedomFightersSonicXFreedomPlanet'', after Infinite's failed attempt to take the Chaos Emeralds (which results in their energy clashing with that of his Phantom Ruby), a rift gets torn between worlds. As a result, Sonic, Tails, Amy, Shadow, Eggman, and Infinite himself get sent into [[VideoGame/FreedomPlanet Avalice]], with them having no idea how to get back home.

* In ''Fanfic/SupermanAndMan'', Creator/ChristopherReeve finds himself trapped in a world where he is Franchise/{{Superman}} while the Man of Steel himself finds himself stuck in a world where he's a comic-book character, occupying a disabled person's body.

* At the start of the ''Fanfic/TimeBreakSaga'', Lambda winds up in the ''Kingdom Hearts'' world with no way back to her reality. This is overall treated as a good thing given how horrible Relius' experiments were on her and how she makes it clear that she doesn't want to return to her world.
* In ''FanFic/TheyreNotPussywillowPixies'', this is what happens to Azrael, Gargamel, and the Smurfs when they go through a portal and end up in Neverland.
* A ''Miraculous Ladybug'' fic, ''Fanfic/{{Ultrasonic}}'', involves Marinette somehow ending up in WesternAnimation/{{Zootopia}}, in the body of a white cat.
* An excellent example of this trope in fanfic is ''Fanfic/WithStringsAttached''. [[Music/TheBeatles The four]] are scooped up and dropped on the planet C'hou with nothing except the clothes on their backs and some musical instruments; they're terrified out of their minds and have absolutely no idea why they're there. The reader knows they're there as the subjects of an alien undergraduate psychology experiment (at least initially, until the experiment breaks down), but the four don't learn anything for around a month, when they're told that they've been brought over and equipped to fetch the three pieces of a statue to end a continent-sized curse. The quest is legitimate in context, but was assigned to them after they were equipped.
* The old crossover ''[[https://www.fanfiction.net/s/2358485/1/What-Insertion What Insertion?]]'' starts with [[Manga/InuYasha Inuyasha]] and a real-world collegian being transferred from their respective worlds into the mind of [[LightNovel/{{Slayers}} Hellmaster Phibrizzo,]] then getting ''him'' permanently stuck in a more modern setting.

* ''Fanfic/{{Outsiders}}: After her repeated attempts to summon a familiar from his world draw the attention and ire of Arceus, Louise requests a chance to prove herself worthy. Arceus give her one year on Earth to do so. Later her friend Henrietta tells Mew that she misses Louise. Hearing this, Mew drags her along to Earth and ditches her in the middle of Lumiose city.

* In ''Webcomic/Hollowtale'', [[VideoGame/HollowKnight the Knight]] finds themself trapped in the world of ''VideoGame/{{Undertale}}'', with no idea how to get back home. To help them adapt to the new world they found themself in, Sans and Papyrus decide to take them under their custody.

* ''Fanfic/ACrownOfStars'': Inverted with Shinji and Asuka. They had been travelling between two different universes when the portal got shut down while they were in their native homeworld, trapping them in there. Played straight with the Avaloni soldiers accompanying them that got trapped in the Evaverse.

* In ''Fanfic/SupermanAndMan'', Creator/ChristopherReeve finds himself trapped in a world where he is Franchise/{{Superman}} while the Man of Steel himself finds himself stuck in a world where he's a comic-book character, occupying a disabled person's body.

* An excellent example of this trope in fanfic is ''Fanfic/WithStringsAttached''. [[Music/TheBeatles The four]] are scooped up and dropped on the planet C'hou with nothing except the clothes on their backs and some musical instruments; they're terrified out of their minds and have absolutely no idea why they're there. The reader knows they're there as the subjects of an alien undergraduate psychology experiment (at least initially, until the experiment breaks down), but the four don't learn anything for around a month, when they're told that they've been brought over and equipped to fetch the three pieces of a statue to end a continent-sized curse. The quest is legitimate in context, but was assigned to them after they were equipped.

* In ''VideoGame/TalesOfHetalia'', the Allies and the Axis are sucked into the world of Rukassia by a magic book.

* FanFic/SlippingBetweenWorlds, in which through the agency of the mysterious Mrs Tachyon and her old-bag-lady shopping trolley - which is not what it seems - a group of British soldiers evade death on Roundworld only to end up in Ankh-Morpork on the Literature/{{Discworld}}.
* In FanFic/TheyreNotPussywillowPixies, this is what happens to Azrael, Gargamel, and the Smurfs when they go through a portal and end up in Neverland.
* Let us just say that FanFic writers LOVE this trope when they do crossovers, self-inserts, etc.
* This trope is common in contemporary Russian fanfiction, having coined the neologism "попаданец" (literally "one who unwittingly arrived").
* The story ''Fanfic/BringMeBackHome'' involves Marinette falling through a portal into an alternate Paris, based on the ''WesternAnimation/MiraculousLadybug'' pilot video, forcing her to deal with a much less friendly Cat Noir than she's used to. In turn, Marinette's counterpart [[FanNickname Bridgette]] ends up in the familiar Paris, is forced to impersonate Marinette for the time being and quickly digs herself into a hole with Alya and Adrien by not realising that Chat Noir is much more popular than she's used to.
* Another ''Miraculous Ladybug'' fic, ''Fanfic/{{Ultrasonic}}'', involves Marinette somehow ending up in WesternAnimation/{{Zootopia}}, in the body of a white cat.
* The old crossover ''[[https://www.fanfiction.net/s/2358485/1/What-Insertion What Insertion?]]'' starts with [[Manga/InuYasha Inuyasha]] and a real-world collegian being transferred from their respective worlds into the mind of [[LightNovel/{{Slayers}} Hellmaster Phibrizzo,]] then getting ''him'' permanently stuck in a more modern setting.
* ''FanFic/RosarioVampireBrightestDarkness Act VI'': In response to the breakdown of the peace treaty and the HDA declaring war on the monster world, the Dark Lords close off the gateways to the monster world to prevent them from attacking, trapping Moka and co. in the human world and forcing them into hiding.
* ''Fanfic/ElementalFlux'' revolves around [[ComicStrip/CalvinAndHobbes Calvin, Hobbes and Susie]] getting trapped in the world of WesternAnimation/AvatarTheLastAirbender.
* ''Fanfic/AmazingFantasy'' involves Franchise/SpiderMan being forcibly transported to Izuku's universe by Mysterio's portal. There he's homeless, considered fictional, and is [[ArrestedForHeroism on the run from the police for his vigilantism.]] After seeing Izuku leap out of traffic the way he had as teenager, Peter decides to teach the newly spider-powered teen how to be Spider-Man while trying to figure out a way home.

* ''Fanfic/BoldoresAndBoomsticks'' revolves around team RWBY venturing through an ultra wormhole into the Pokémon world. A later chapter reverses the situation, with an Absol careening into Remnant moments before the wormhole snaps shut and joining Taiyang, Winter, Qrow, and team JNPR in their quest to go after their lost friends and family.

* ''Fanfic/MassFoundations'' has this as a basic plotline for ''Redemption in the Stars'', ''A New Day'', and ''All the World's a Stage''. Something had caused the protagonist(s) to be transported to another universe and they have to adapt and maybe find a way back. Though in ''All the World's a Stage'', the Doctor and the Lone Wanderer were able to travel between universes thanks to the TARDIS.
* ''Fanfic/AbyssalPlain'' has the superhero and supervillain team of Breakthrough and Undersiders from ''{{Literature/Ward}}'' finding themselves in the Abyss from ''{{Literature/Pact}}''. Bonus points for the teams to come from a universe without magic, now facing off against magical threats.
* In crossover fanfiction ''Fanfic/{{Displaced}}'', Spider-Man is dropped off in the DC Universe with no apparent way to return home.

* [[Franchise/BlazBlue Ragna]] ends up trapped in [[Manga/FairyTail Fiore]] in ''Fanfic/BondsBeyondTheBoundary''. Kokonoe manages to link the gap between their worlds so Ragna can now leave when he feels like it. He refuses, as Terumi is in the ''Fairy Tail'' world and Ragna will be damned if he lets him roam around and cause havoc.
* Many ''Franchise/BlazBlue'' characters are trapped in the world of ''VideoGame/FireEmblemFates'' in the Fanfic, ''Fanfic/FireEmblemFatesCalamity'', and have all been stuck there for five years. To top it off, many characters, such as Ragna, Noel, and Bang, are all suffering from a case of WistfulAmnesia and don't remember their old world, believing themselves to be inhabitants of the ''Fates'' world.
* ''Fanfic/{{Metro}}'': ZigzaggedTrope. Mads and Thomas are from AnotherUniverse, specifically, the ''TabletopGame/{{Shadowrun}}'' universe, and effectively also have YouCantGoHomeAgain, as while they ''can'', they wouldn't be given a warm welcome if they made it.
* ''Fanfic/ThePortal'': Thomas Smith and his family wind up being pulled into the Dragon Realms, and it's heavily implied that they may be [[YouCantGoHomeAgain unable to return to their world]].
* ''Fanfic/HeartsOfIce'': Akane is exiled to the Kami Plane by Cologne's magic, and she spends seven years fighting demons until she manages to return to her own plane.
* ''Fanfic/{{Justice}}'': All the [[Manga/OnePiece Strawhat Pirates]] are stranded in the ''WesternAnimation/JusticeLeague'' universe and as such, they all try to blend in and avoid the heroes there while secretly try to find a way back.
* At the start of the ''Fanfic/TimeBreakSaga'', Lambda winds up in the ''Kingdom Hearts'' world with no way back to her reality. This is overall treated as a good thing given how horrible Relius' experiments were on her and how she makes it clear that she doesn't want to return to her world.
* At the start of ''WebAnimation/FreedomFightersSonicXFreedomPlanet'', after Infinite's failed attempt to take the Chaos Emeralds (which results in their energy clashing with that of his Phantom Ruby), a rift gets torn between worlds. As a result, Sonic, Tails, Amy, Shadow, Eggman, and Infinite himself get sent into [[VideoGame/FreedomPlanet Avalice]], with them having no idea how to get back home.
* In ''[[https://www.fanfiction.net/s/1509209/1/Lord-of-the-Mutants Lord of the Mutants]]'', [[Literature/TheLordOfTheRings the Fellowship]] get trapped in the world of Film/XMen1, and end up tangling with the Brotherhood of Evil Mutants. [[https://www.fanfiction.net/s/1848890/1/Lord-of-the-Mutants-II The sequel]] has the X-Men get stuck in Middle-Earth.

* ''Fanfic/ManehattansLoneGuardian'' kicks off with [[VideoGame/MegaManZero Fairy Leviathan]] waking up on a rooftop in Manehattan, Equestria, after getting herself caught in Omega's explosive death throes. She's not happy about being subjected to "one of the oldest cliches in fiction", in her words.

* ''Fanfic/ManehattansNewGuardian'' kicks off with [[VideoGame/MegaManZero Fairy Leviathan]] waking up on a rooftop in Manehattan, Equestria, after getting herself caught in Omega's explosive death throes. She's not happy about being subjected to "one of the oldest cliches in fiction", in her words.

* ''Fanfic/BoldoresAndBoomsticks'' revolves around team RWBY venturing through an ultra wormhole into the pokemon world. A later chapter reverses the situation, with an Absol careening into Remnant moments before the wormhole snaps shut and joining Taiyang, Winter, Qrow, and team JNPR in their quest to go after their lost friends and family.

* ''Fanfic/DungeonKeeperAmi'': Ami, in combination with YouCantGoHomeAgain, being stuck in the ''VideoGame/DungeonKeeper'' universe and researching a way to get her soul back and return home.

** ''FanFic/HomeWithTheFairies'' is a {{deconstruction}}. Maddie lands in Middle-earth, but she is lost. When she finds a town, she hits a LanguageBarrier [[RealityEnsues because no one speaks English or knows anything about America, her home.]] She almost dies, and lampshades the PlotArmor that seems to keep her alive. Unlike most of these characters, Maddie also wants to find a way home.

* In ''[[https://www.fanfiction.net/s/9916786/1/Spider-Man-and-Oola Spider-Man and Oola]]'', ComicBook/SpiderMan is transported to the world of Franchise/StarWars along with ComicBook/DoctorDoom, and saves Oola the Twi'lek from the Rancor. As of the most recently published chapter, ComicBook/CaptainAmerica, Tigra and [[ComicBook/TheFanfstasticFour the Human Torch]] have joined him.

* In ''[[https://www.fanfiction.net/s/9916786/1/Spider-Man-and-Oola Spider-Man and Oola]]'', ComicBook/SpiderMan is transported to the world of Franchise/StarWars along with ComicBook/DoctorDoom, and saves Oola the Twi'lek from the Rancor. As of the most recently published chapter, ComicBook/CaptainAmerica, Tigra and ComicBook/TheHumanTorch have joined him.

* ''Fanfic/{{Justice}}'': All the [[Manga/OnePiece Strawhat Pirates]] are stranded in the ''WesternAnimation/JusticeLeague'' universe and as such, they all try to blend in there while secretly try to find a way back.

* ''Fanfic/{{Justice}}'': All the ''[[Manga/OnePiece Strawhat Pirates]]'' are stranded in the ''WesternAnimation/JusticeLeague'' universe and as such, they all try to blend in there while secretly try to find a way back.

* ''Fanfic/{{Justice}}'': All the Strawhat Pirates are stranded in the ''WesternAnimation/JusticeLeague'' universe and as such, they all try to blend in there while secretly try to find a way back.

''Fanfic/{{Justice}}'': All the Strawhat Pirates are stranded in the ''WesternAnimation/JusticeLeague'' universe and as such, they all try to blend in there while secretly try to find a way back.

* Similarly to ''MLP'' and ''[=LoTR=]'' above, ''WebComic/TwoKinds''has a slew of fics about the protagonist getting isekaied into Mekkan and bumping into an escaped [[BeastMan keidran]] slave-girl, [[RescueRomance who immediately falls in love with him when he dispatches her master.]]

** ''FanFic/TheNonBronyVerse'' has our protagonist summoned to Equestria when Celestia sees him get hit by a car. Like Wesker, he also disaproves.

* ''FanFic/MassFoundations'' has this as a basic plotline for ''Redemption in the Stars'', ''A New Day'', and ''All the World's a Stage''. Something had caused the protagonist(s) to be transported to another universe and they have to adapt and maybe find a way back. Though in ''All the World's a Stage'', the Doctor and the Lone Wanderer were able to travel between universes thanks to the TARDIS.

* Many ''Franchise/BlazBlue'' characters are trapped in the world of ''VideoGame/FireEmblemFates'' in the Fanfic, ''Fanfic/FireEmblemFatesCalamity'' and have all been stuck there for five years. To top it off, many characters, such as Ragna, Noel, and Bang, are all suffering from a case of WistfulAmnesia and don't remember their old world, believing themselves to be inhabitants of the ''Fates'' world.