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* ''Fanfic/TheRavensPlan'' is another. The [[TheBadGuyWins Night King and his forces have overwhelmed the living]], so Bran and Melisandre carry out a highly risky magical ritual to send a group of core characters back in time in order to avert the War of the Five Kings and other conflicts which weakened Westeros before the Night King's assault. However, it ends up [[GoneHorriblyRight working too well]], with the already unpredictable and unstable spell being supercharged by [[ThePowerOfBlood the blood of 3000 soldiers]] and causing ''way'' more people than expected or intended to remember what happened to them in their previous lives, throwing the whole plan off the rails.

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* ''Fanfic/TheRavensPlan'' is another. The [[TheBadGuyWins Night King and his forces have overwhelmed the living]], so Bran and Melisandre carry out a highly risky magical ritual to send a group of core characters back in time in order to avert the War of the Five Kings and other conflicts which weakened Westeros before the Night King's assault. However, it ends up [[GoneHorriblyRight working too well]], with the already unpredictable and unstable spell being supercharged by [[ThePowerOfBlood the blood of 3000 soldiers]] and causing ''way'' more people than expected or intended to remember what happened to them in their previous lives, throwing the whole plan off {{off the rails.
rails}}.
* ''Fanfic/ThereAndBackAgain'' similarly uses PeggySue. In this story, the Three-Eyed Raven (true identity Brynden "Bloodraven" Rivers) hijacked the Prince That Was Promised prophecy and manipulated events in such a way to install himself as Westeros' ImmortalRuler by [[GrandTheftMe fully taking over Bran Stark's body]]. The gods of the world (the Seven, the Old Gods, and the Lord of Light), displeased with this turn of events, pull a DivineIntervention and send Jon, Sansa, Ned, Varys, Aemon, and Tormund back in time to stop Bloodraven's plan and help Jon truly fulfill his destiny.






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* ''Fanfic/DoingItRightThisTime'': As usual in ''Evangelion'' PeggySue stories, one of the primary goals of Shinji, Asuka and Rei is averting TheEndOfTheWorldAsWeKnowIt. Another goal is fixing the unholy mess that was their relationship and learning to get along better with each other (which will lead to unexpected results known as the [[OneTrueThreesome "Israfel Special"]]).
* ''Fanfic/GoingAnotherWay'', features this through [[spoiler:Rei Ayanami, [[MyGodWhatHaveIDone horrified at what the Third Impact truly wrought]], going back in time to change a few things around in order to prevent the disaster. The biggest change she made was influencing Gendo Ikari's thoughts subtly enough to make him leave Shinji in the care of Yui's brother so as to ensure Shinji would be less of an emotional wreck]]. Everyone gets occasional flashes to their previous lives in dreams meanwhile.
* ''Fanfic/OnceMoreWithFeelingCrazy88'': [[PhysicalGod Lilith]] misunderstands [[WoobieDestroyerOfWorlds Shinji]] when he says he wants to go back, and she sends him back in time. Shinji gets shocked but he decides that he will use that chance nevertheless to [[TheAtoner atone for everything that he did and did not]]]. He is so determined to win the Angel War, protect his surrogate family and make amends that his behaviour gets [[ParentalSubstitute Misato]] puzzled, since she does not understand why [[ChronicHeroSyndrome he goes out of his way to help everyone and make them happy]] (and he cannot tell her he feels [[SurvivorGuilt guilty]] [[MyGodWhatHaveIDone for leaving her, Asuka and Rei dying]] and [[ItsAllMyFault obliterating the whole humankind]]).
* {{Subverted}} in ''Manga/ReTake''. [[spoiler:Shinji of ''[[Anime/NeonGenesisEvangelion End of Evangelion]]'' wakes up in the past, just after the battle with Leliel. He tries to set right everything that went wrong to prevent the End of Evangelion. It turns out he's only making life better for an alternate version of himself, and there's nothing he can do to change that. He eventually accepts it, and returns to the CrapsackWorld future he belongs to. Though there is an implication of a HappyEnding for him, so it's all good.]]
* ''Fanfic/TheSecondTry'': After surviving on their own [[AfterTheEnd in the post-TI world]] Shinji and Asuka wake up one day and find they have traveled back in time. Shinji quickly thinks of looking for some way to prevent the [[EndOfTheWorldAsWeKnowIt end of the world]], but [[TheWoobie Asuka was too depressed to try at the beginning]], and he needed to convince her.
* ''Fanfic/ThousandShinji'': When [[spoiler:''[[TabletopGame/Warhammer40000 the Necrons]]'']] had all but [[spoiler:conquered the galaxy, the Warhammer 40000 gods]] decided that the only way to fight them was travelling to the far past and rewriting history.



* ''Fanfic/DoingItRightThisTime'': As usual in ''Evangelion'' PeggySue stories, one of the primary goals of Shinji, Asuka and Rei is averting TheEndOfTheWorldAsWeKnowIt. Another goal is fixing the unholy mess that was their relationship and learning to get along better with each other (which will lead to unexpected results known as the [[OneTrueThreesome "Israfel Special"]]).



* Yet another ''Evangelion'' example comes in the form of ''Fanfic/GoingAnotherWay'', this time through [[spoiler:Rei Ayanami, [[MyGodWhatHaveIDone horrified at what the Third Impact truly wrought]], going back in time to change a few things around in order to prevent the disaster. The biggest change she made was influencing Gendo Ikari's thoughts subtly enough to make him leave Shinji in the care of Yui's brother so as to ensure Shinji would be less of an emotional wreck]]. Everyone gets occasional flashes to their previous lives in dreams meanwhile.



* ''Fanfic/OnceMoreWithFeelingCrazy88'': [[PhysicalGod Lilith]] misunderstands [[WoobieDestroyerOfWorlds Shinji]] when he says he wants to go back, and she sends him back in time. Shinji gets shocked but he decides that he will use that chance nevertheless to [[TheAtoner atone for everything that he did and did not]]]. He is so determined to win the Angel War, protect his surrogate family and make amends that his behaviour gets [[ParentalSubstitute Misato]] puzzled, since she does not understand why [[ChronicHeroSyndrome he goes out of his way to help everyone and make them happy]] (and he cannot tell her he feels [[SurvivorGuilt guilty]] [[MyGodWhatHaveIDone for leaving her, Asuka and Rei dying]] and [[ItsAllMyFault obliterating the whole humankind]]).
* {{Subverted}} in ''Manga/ReTake''. [[spoiler:Shinji of ''[[Anime/NeonGenesisEvangelion End of Evangelion]]'' wakes up in the past, just after the battle with Leliel. He tries to set right everything that went wrong to prevent the End of Evangelion. It turns out he's only making life better for an alternate version of himself, and there's nothing he can do to change that. He eventually accepts it, and returns to the CrapsackWorld future he belongs to. Though there is an implication of a HappyEnding for him, so it's all good.]]



* ''Fanfic/TheSecondTry'': After surviving on their own [[AfterTheEnd in the post-TI world]] Shinji and Asuka wake up one day and find they have traveled back in time. Shinji quickly thinks of looking for some way to prevent the [[EndOfTheWorldAsWeKnowIt end of the world]], but [[TheWoobie Asuka was too depressed to try at the beginning]], and he needed to convince her.
* ''Fanfic/ThousandShinji'': When [[spoiler:''[[TabletopGame/Warhammer40000 the Necrons]]'']] had all but [[spoiler:conquered the galaxy, the Warhammer 40000 gods]] decided that the only way to fight them was travelling to the far past and rewriting history.
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* "[[https://archiveofourown.org/works/224692 Remember Me This Way]]" sees Sam Beckett (''Series/QuantumLeap'') arrive in the life of Jack O'Neill (''Series/StargateSG1'') shortly after the death of Jack's son Charlie and shortly before the first mission to Abydos. Sam and Al are immediately focused on why Sam didn't Leap into Jack's life in time to prevent Charlie's death, but after Al learns that the original mission through the Stargate ended with the apparent death of most of the team, he speculates that Sam's purpose is to get Jack to accept the mission. While it was ultimately accepted to be a suicide mission, Ziggy calculated that Jack would be more likely to tell the rest of the team about the nature of the mission and give them a chance to go home, particularly since Jack would take Doctor Daniel Jackson with him through the Stargate where the second choice left Daniel behind. However, Sam and Al have to concede that Charlie's death did so much damage to the O'Neills' relationship that Al isn't sure the marriage would stay "fixed" once Sam Leaped out.

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* "[[https://archiveofourown.org/works/224692 Remember Me This Way]]" sees Sam Beckett (''Series/QuantumLeap'') arrive in the life of Jack O'Neill (''Series/StargateSG1'') shortly after the death of Jack's son Charlie and shortly before the first mission to Abydos. Sam and Al are immediately focused on why Sam didn't Leap into Jack's life in time to prevent Charlie's death, but after Al learns that the original mission through the Stargate ended with the apparent death of most of the team, he speculates that Sam's purpose is to get Jack to accept the mission. While it was ultimately accepted to be a suicide mission, Ziggy calculated that Jack would be more likely to tell the rest of the team about the nature of the mission and give them a chance to go home, particularly since Jack would take Doctor Daniel Jackson with him through the Stargate where the second choice left Daniel behind. However, They consider trying to help Jack's marriage to Sara as well, but ultimately Sam and Al have to concede that Charlie's death did so much damage to the O'Neills' relationship that Al isn't sure the marriage would stay "fixed" once Sam Leaped out.out no matter what he did with Sara beforehand.
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* ''Fanfic/OnceMoreWithFeeling'': [[PhysicalGod Lilith]] misunderstands [[WoobieDestroyerOfWorlds Shinji]] when he says he wants to go back, and she sends him back in time. Shinji gets shocked but he decides that he will use that chance nevertheless to [[TheAtoner atone for everything that he did and did not]]]. He is so determined to win the Angel War, protect his surrogate family and make amends that his behaviour gets [[ParentalSubstitute Misato]] puzzled, since she does not understand why [[ChronicHeroSyndrome he goes out of his way to help everyone and make them happy]] (and he cannot tell her he feels [[SurvivorGuilt guilty]] [[MyGodWhatHaveIDone for leaving her, Asuka and Rei dying]] and [[ItsAllMyFault obliterating the whole humankind]]).

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* ''Fanfic/OnceMoreWithFeeling'': ''Fanfic/OnceMoreWithFeelingCrazy88'': [[PhysicalGod Lilith]] misunderstands [[WoobieDestroyerOfWorlds Shinji]] when he says he wants to go back, and she sends him back in time. Shinji gets shocked but he decides that he will use that chance nevertheless to [[TheAtoner atone for everything that he did and did not]]]. He is so determined to win the Angel War, protect his surrogate family and make amends that his behaviour gets [[ParentalSubstitute Misato]] puzzled, since she does not understand why [[ChronicHeroSyndrome he goes out of his way to help everyone and make them happy]] (and he cannot tell her he feels [[SurvivorGuilt guilty]] [[MyGodWhatHaveIDone for leaving her, Asuka and Rei dying]] and [[ItsAllMyFault obliterating the whole humankind]]).
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* ''Fanfic/LeaveForMendeleiev'': "Race Against Time" features Timebreaker jumping back in time to try and prevent the destruction of her pocketwatch, while her timeline's iteration of Ladybug hitches a ride and [[MyFutureSelfAndMe warns her past/present self]] that [[spoiler:Nadja is about to arrive to pick up her order early, and Marinette needs to be there to avert a ForWantOfANail scenario]]. This also has the unintentional (but highly fortunate) side-effect of [[spoiler:throwing Adrien off Marinette's scent: he suspected she might be Ladybug, but seeing them together causes him to assume otherwise]].

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* ''Fanfic/LeaveForMendeleiev'': "Race Against Time" features Timebreaker jumping back in time to try and prevent the destruction of her pocketwatch, while her timeline's iteration of Ladybug hitches a ride and [[MyFutureSelfAndMe warns her past/present self]] that [[spoiler:Nadja is about to arrive to pick up her order early, and Marinette needs to be there to avert a ForWantOfANail scenario]].there]]. This also has the unintentional (but highly fortunate) side-effect of [[spoiler:throwing Adrien off Marinette's scent: he suspected she might be Ladybug, but seeing them together causes him to assume otherwise]].

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* The ''Series/StargateSG1'' fic "[[https://www.fanfiction.net/s/4734058/1/Ending-Before-We-Begin Ending Before We Begin]]" features another of Ba'al's clones attempting a variation of the original's plan in ''Film/StargateContinuum''; rather than go back a few decades and deprive Earth of the Stargate, he instead only goes back a decade in time. As part of his plan to take power, he makes one very positive change that is ultimately for his own benefit; [[spoiler:using his future knowledge, Ba'al retrieves the corpse of Charlie O'Neill after his accidental death (leaving a dead clone in Charlie's place), and brings him back to life in a sarcophagus, intending to use Charlie as a hostage to force Jack O'Neill to obey him]].



* The ''Series/StargateSG1'' fic "[[https://www.fanfiction.net/s/4734058/1/Ending-Before-We-Begin Ending Before We Begin]]" features another of Ba'al's clones attempting a variation of the original's plan in ''Film/StargateContinuum''; rather than go back a few decades and deprive Earth of the Stargate, he instead only goes back a decade in time. As part of his plan to take power, he makes one very positive change that is ultimately for his own benefit; [[spoiler:using his future knowledge, Ba'al retrieves the corpse of Charlie O'Neill after his accidental death (leaving a dead clone in Charlie's place), and brings him back to life in a sarcophagus, intending to use Charlie as a hostage to force Jack O'Neill to obey him]].

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[[SetRightWhatOnceWentWrong Setting Right What Once Went Wrong]] in FanWorks

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* "[[https://archiveofourown.org/works/224692 Remember Me This Way]]" sees Sam Beckett (''Series/QuantumLeap'') arrive in the life of Jack O'Neill (''Series/StargateSG1'') shortly after the death of Jack's son Charlie and shortly before the first mission to Abydos. Sam and Al are immediately focused on why Sam didn't Leap into Jack's life in time to prevent Charlie's death, but after Al learns that the original mission through the Stargate ended with the apparent death of most of the team, he speculates that Sam's purpose is to get Jack to accept the mission. While it was ultimately accepted to be a suicide mission, Ziggy calculated that Jack would be more likely to tell the rest of the team about the nature of the mission and give them a chance to go home, particularly since Jack would take Doctor Daniel Jackson with him through the Stargate where the second choice left Daniel behind. However, Sam and Al have to concede that Charlie's death did so much damage to the O'Neills' relationship that Al isn't sure the marriage would stay "fixed" once Sam Leaped out.
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* ''[[https://archiveofourown.org/works/10129274?view_full_work=true#workskin Back From the Future]]'' : Luke Skywalker and Darth Vader (accidentally!) travel back in time to [[WesternAnimation/StarWarsTheCloneWars Clone Wars The Clone Wars era ]] , to stop Palpatine's /Darth Sidious' rise to power, Order 66, destruction of Jedi Order and Republic, Padmé Amidala's Death and Anakin Skywalker's [[spoiler: younger alt-version of Darth Vader ]] fall to The Dark Side.
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* ''Fanfic/TheWeaverOption'' begins with the galaxy being overrun by multiple enormous Tyranid fleets because its inhabitants were too busy and weakened fighting each other. Tzeentch orders its last sorcerers to carry out a ritual that will bring certain people from the faraway past into a closer past: the plan was to use them to ensure Chaos' victory in time to prepare for the Tyranids, but the interference of the last Ultramarine instead spreads the targets across the Imperium, allowing the latter to reap the reward.

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* The ''Fanfic/PonyPOVSeries'':

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* ''Fanfic/MyChoicesTwistedTalesThroughTime'': After Twilight accidentally strand herself a thousand years and change in the past, she decides to use the opportunity to prevent princess Luna's transformation into Nightmare Moon. The chapters set in the present show that she was successful at this, as Luna continues to rule peacefully alongside Celestia.
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''Fanfic/PonyPOVSeries'':

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* In the ''Film/AvengersInfinityWar'' fic ''[[https://archiveofourown.org/works/21216794/chapters/50511512 Checkmate]]'', after Thanos has left Titan with the Time Stone, Tony suggests that they use a device he created back on Earth that can project an individual's consciousness back in time to essentially possess their past self; with this plan proposed, Peter Parker is chosen to be the one sent back, projecting himself back to 2015 (shortly after the events of [[Film/AvengersAgeOfUltron the Battle of Sokovia]]) to warn the Avengers of Thanos's ambitions.



* In the ''Film/AvengersInfinityWar'' fic ''[[https://archiveofourown.org/works/21216794/chapters/50511512 Checkmate]]'', after Thanos has left Titan with the Time Stone, Tony suggests that they use a device he created back on Earth that can project an individual's consciousness back in time to essentially possess their past self; with this plan proposed, Peter Parker is chosen to be the one sent back, projecting himself back to 2015 (shortly after the events of [[Film/AvengersAgeOfUltron the Battle of Sokovia]]) to warn the Avengers of Thanos's ambitions.

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* ''Fanfic/TheRavensPlan'' is another. The [[TheBadGuyWins Night King and his forces have overwhelmed the living]], so Bran and Melisandre carry out a highly risky magical ritual to send a group of core characters back in time in order to avert the War of the Five Kings and other conflicts which weakened Westeros before the Night King's assault. However, it ends up [[GoneHorriblyRight working too well]], with the already unpredictable and unstable spell being supercharged by [[ThePowerOfBlood the blood of 3000 soldiers]] and causing ''way'' more people than expected or intended to remember what happened to them in their previous lives, throwing the whole plan off the rails.



* ''Fanfic/TheRavensPlan'' is probably the crowning example, however, as Bran and Melisandre carry out a ritual to send a group of core characters back in order to avert the War of the Five Kings and other conflicts which weakened Westeros before the Night King's assault. However, it ends up [[GoneHorriblyRight working too well]], with the spell being supercharged and causing hundreds (if not ''thousands'') of people beyond the intended ones remembering.
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* ''Fanfic/RelicOfTheFuture'': The setup of the fic is that after the heroes [[PyrrhicVictory deal a mortal blow to Salem which costs the lives of everyone except Jaune and leaves a war-torn Remnant in ruins]], Jaune makes a [[DealWithTheDevil deal with Salem]] before the latter fully expires. She uses the Relics' combined magic to send Jaune over a decade back in time, thereby giving Jaune a chance to fix things for the better and achieve a much less pyrrhic victory... and giving Salem's past self a new chance to survive and win should Jaune fail with all the timeline alterations his presence causes.

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* In the ''TabletopGame/Warhammer40000'' Fanfic/Roleplay by post story ''[[http://1d4chan.org/wiki/Abaddon#Abaddon.27s_14th_Black_Crusade Abaddon Quest]]'', there's a rather amusing [[InvertedTrope Inversion]], the eponymous Chaos Lord and his flunkies travel back in time to kill the GodEmperor as a baby, which is to say they travel back to MakeWrongWhatOnceWentRight. Considering [[Website/FourChan /tg/'s]] [[GeneralFailure opinion]] of Abaddon, FailureIsTheOnlyOption. As is [[HilarityEnsues Hilarity.]]
* In the ''Literature/{{Animorphs}}'' fic ''[[https://www.fanfiction.net/s/628665/1/Animorphs-55-The-End Animorphs 55: The End]]'', after the deaths of the other Animorphs, Cassie (on the not-advice of the Ellimist) [[spoiler:retrieves the Time Matrix and essentially blackmails the Ellimist and Crayak to reset the timeline to change the outcome of the final battle with the Yeerks. As a result, Rachel is saved, Ax directly kills Visser One after the Yeerk tries to escape by leaving Alloran, and Tobias retains his ability to morph even after he gets 'stuck' in human form, but Jake's parents are killed when their Yeerks refuse to surrender]].
* Happens ''a lot'' in ''Series/BuffyTheVampireSlayer'' fics. The time traveler is usually either Buffy, Spike or Angel. Rare cases in include Dawn (like in this fic ''[[https://www.fanfiction.net/s/10814693/1/Breaking-Novikov Breaking Novikov]]'') and Xander (like in this fic ''[[https://www.fanfiction.net/s/11103312/1/Seeds-of-Time Seeds of Time]]''). Almost all time travel fics happen in order to change the events of the past (mainly Buffy's second death, thus erasing seasons 6 & 7) and most likely than not, getting a certain pairing together (especially Spuffy).
** A particularly distinctive example of this occurs in the ''Series/{{Angel}}'' fic ''[[https://www.fanfiction.net/s/1215322/1/Impact Impact]]'', when Cordelia, through sheer chance, is sent back from just before Darla gives birth ("[[Recap/AngelS03E07Offspring Offspring]]") to just before Doyle’s death ("[[Recap/AngelS01E09Hero Hero]]"). She immediately seizes on the opportunity to undo Doyle's death, [[spoiler:and even leaves notes for her past self so that Angel Investigations can avoid the worst of the challenges they’ll face in the future once she returns home]].
* The plot of [[GetBackToTheFuture "Time Terror"]], an episode of ''Fanfic/CalvinAndHobbesTheSeries'', involves Calvin trying to rescue his friends from different time periods before time gets screwed up.

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* In the ''TabletopGame/Warhammer40000'' Fanfic/Roleplay by post story ''[[http://1d4chan.org/wiki/Abaddon#Abaddon.27s_14th_Black_Crusade Abaddon Quest]]'', there's a rather amusing [[InvertedTrope Inversion]], the eponymous Chaos Lord and his flunkies travel back in time to kill the GodEmperor as a baby, which is to say they travel back to MakeWrongWhatOnceWentRight. Considering [[Website/FourChan /tg/'s]] [[GeneralFailure opinion]] of Abaddon, FailureIsTheOnlyOption. As is [[HilarityEnsues Hilarity.]]
* In the ''Literature/{{Animorphs}}'' fic ''[[https://www.fanfiction.net/s/628665/1/Animorphs-55-The-End Animorphs 55: The End]]'', after the deaths of the other Animorphs, Cassie (on the not-advice of the Ellimist) [[spoiler:retrieves the Time Matrix and essentially blackmails the Ellimist and Crayak to reset the timeline to change the outcome of the final battle with the Yeerks. As a result, Rachel is saved, Ax directly kills Visser One after the Yeerk tries to escape by leaving Alloran, and Tobias retains his ability to morph even after he gets 'stuck' in human form, but Jake's parents are killed when their Yeerks refuse to surrender]].
* Happens ''a lot'' in ''Series/BuffyTheVampireSlayer'' fics. The time traveler is usually either Buffy, Spike or Angel. Rare cases in include Dawn (like in this fic ''[[https://www.fanfiction.net/s/10814693/1/Breaking-Novikov Breaking Novikov]]'') and Xander (like in this fic ''[[https://www.fanfiction.net/s/11103312/1/Seeds-of-Time Seeds of Time]]''). Almost all time travel fics happen in order to change the events of the past (mainly Buffy's second death, thus erasing seasons 6 & 7) and most likely than not, getting a certain pairing together (especially Spuffy).
** A particularly distinctive example of this occurs in the ''Series/{{Angel}}'' fic ''[[https://www.fanfiction.net/s/1215322/1/Impact Impact]]'', when Cordelia, through sheer chance, is sent back from just before Darla gives birth ("[[Recap/AngelS03E07Offspring Offspring]]") to just before Doyle’s death ("[[Recap/AngelS01E09Hero Hero]]"). She immediately seizes on the opportunity to undo Doyle's death, [[spoiler:and even leaves notes for her past self so that Angel Investigations can avoid the worst of the challenges they’ll face in the future once she returns home]].
*
''Fanfic/CalvinAndHobbesTheSeries'': The plot of [[GetBackToTheFuture "Time Terror"]], an episode of ''Fanfic/CalvinAndHobbesTheSeries'', Terror"]] involves Calvin trying to rescue his friends from different time periods before time gets screwed up.



* In the ''[[http://archiveofourown.org/series/568186 Changing tides]]'' series, Laurel brings her past self, Diggle, Tommy, Roy, and Thea 16 years into the future. She then shows them the first two years of Oliver's exile, the first two years of his return (both are shown as videos made by downloading memories), and finally tells them details that happened after and as a result of the events of those early years. This is done in the hope that this knowledge will allow them to prevent the worst of the tragedies that await them. The third installment, deals with them having been sent back to their original time and starting to attempt to do exactly that.
* In the ''Film/AvengersInfinityWar'' fic ''[[https://archiveofourown.org/works/21216794/chapters/50511512 Checkmate]]'', after Thanos has left Titan with the Time Stone, Tony suggests that they use a device he created back on Earth that can project an individual's consciousness back in time to essentially possess their past self; with this plan proposed, Peter Parker is chosen to be the one sent back, projecting himself back to 2015 (shortly after the events of [[Film/AvengersAgeOfUltron the Battle of Sokovia]]) to warn the Avengers of Thanos's ambitions.
* ''Fanfic/ACrownOfStars'': [[BigGood Daniel]] travels back and forward in time bringing Shinji and Asuka along with him to fix the mistakes of the past.
* ''Fanfic/DoingItRightThisTime'': As usual in ''Evangelion'' PeggySue stories, one of the primary goals of Shinji, Asuka and Rei is averting TheEndOfTheWorldAsWeKnowIt. Another goal is fixing the unholy mess that was their relationship and learning to get along better with each other (which will lead to unexpected results known as the [[OneTrueThreesome "Israfel Special"]]).
* ''Fanfic/TheElementOfTime'': After things epically head south in the final battle against the Juubi, Naruto is given the chance to travel back in time and fix everything by a powerful interdimensional warrior named Felix Yoshoryuu. With help from this warrior, plus multiple allies that later join the cause, he sets off to save as many people and foil as much evil as he can in his newly granted second chance. But unfortunately, with this time travel having inspired a powerful threat from the same interdimensional world as Felix to attempt his own devastating plans for the ninja world, it soon becomes clear that this new timeline will come with just as many dangers (if not more) as there were before.
* The ''Series/StargateSG1'' fic "[[https://www.fanfiction.net/s/4734058/1/Ending-Before-We-Begin Ending Before We Begin]]" features another of Ba'al's clones attempting a variation of the original's plan in ''Film/StargateContinuum''; rather than go back a few decades and deprive Earth of the Stargate, he instead only goes back a decade in time. As part of his plan to take power, he makes one very positive change that is ultimately for his own benefit; [[spoiler:using his future knowledge, Ba'al retrieves the corpse of Charlie O'Neill after his accidental death (leaving a dead clone in Charlie's place), and brings him back to life in a sarcophagus, intending to use Charlie as a hostage to force Jack O'Neill to obey him]].
* ''Fanfic/GogglesAndTheTears'', being a TimeTravel crossover, is set up as a final chance to defeat [[AIIsACrapshoot SHODAN]] before she uses [[VideoGame/BioshockInfinite Elizabeth]] to take over the multiverse. A majority of the story involves a trip to Columbia, and one chapter named after this trope involves Booker [=DeWitt=], Elizabeth, and a Vox Populi member detouring to Finkton to rescue Chen Lin before Jeremiah Fink [[spoiler: kills him again]]. By Booker distracting Fink in a firefight, Elizabeth manages to sneak Lin out to his gun shop. This allows the Vox to properly get their weapons, resulting in the Vox [[BigDamnHeroes allying themselves in the fight against]] SHODAN instead of trying to kill Booker. [[spoiler: It turns out that the chapter played out this way because of the G-Man, who had been fed up with the Luteces running Booker through the same scenario 122 times.]]
* Yet another ''Evangelion'' example comes in the form of ''Fanfic/GoingAnotherWay'', this time through [[spoiler:Rei Ayanami, [[MyGodWhatHaveIDone horrified at what the Third Impact truly wrought]], going back in time to change a few things around in order to prevent the disaster. The biggest change she made was influencing Gendo Ikari's thoughts subtly enough to make him leave Shinji in the care of Yui's brother so as to ensure Shinji would be less of an emotional wreck]]. Everyone gets occasional flashes to their previous lives in dreams meanwhile.
* In ''VideoGame/HetaOni'', [[spoiler:Italy has been rewinding time again and again so that everyone can get out of the HauntedHouse alive]].
* A very common goal of certain loopers in ''Fanfic/TheInfiniteLoops'' is to prevent something that went wrong in baseline.

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[[AC:Crossover]]
* In the ''[[http://archiveofourown.org/series/568186 Changing tides]]'' series, Laurel brings her past self, Diggle, Tommy, Roy, and Thea 16 years into the future. She then shows them the first two years of Oliver's exile, the first two years of his return (both are shown as videos made by downloading memories), and finally tells them details that happened after and as a result of the events of those early years. This is done in the hope that this knowledge will allow them to prevent the worst of the tragedies that await them. The third installment, deals with them having been sent back to their original time and starting to attempt to do exactly that.
* In the ''Film/AvengersInfinityWar'' fic ''[[https://archiveofourown.org/works/21216794/chapters/50511512 Checkmate]]'', after Thanos has left Titan with the Time Stone, Tony suggests that they use a device he created back on Earth that can project an individual's consciousness back in time to essentially possess their past self; with this plan proposed, Peter Parker is chosen to be the one sent back, projecting himself back to 2015 (shortly after the events of [[Film/AvengersAgeOfUltron the Battle of Sokovia]]) to warn the Avengers of Thanos's ambitions.
* ''Fanfic/ACrownOfStars'': [[BigGood Daniel]] travels back and forward in time bringing Shinji and Asuka along with him to fix the mistakes of the past.
* ''Fanfic/DoingItRightThisTime'': As usual in ''Evangelion'' PeggySue stories, one of the primary goals of Shinji, Asuka and Rei is averting TheEndOfTheWorldAsWeKnowIt. Another goal is fixing the unholy mess that was their relationship and learning to get along better with each other (which will lead to unexpected results known as the [[OneTrueThreesome "Israfel Special"]]).
* ''Fanfic/TheElementOfTime'': After things epically head south in the final battle against the Juubi, Naruto is given the chance to travel back in time and fix everything by a powerful interdimensional warrior named Felix Yoshoryuu. With help from this warrior, plus multiple allies that later join the cause, he sets off to save as many people and foil as much evil as he can in his newly granted second chance. But unfortunately, with this time travel having inspired a powerful threat from the same interdimensional world as Felix to attempt his own devastating plans for the ninja world, it soon becomes clear that this new timeline will come with just as many dangers (if not more) as there were before.
* The ''Series/StargateSG1'' fic "[[https://www.fanfiction.net/s/4734058/1/Ending-Before-We-Begin Ending Before We Begin]]" features another of Ba'al's clones attempting a variation of the original's plan in ''Film/StargateContinuum''; rather than go back a few decades and deprive Earth of the Stargate, he instead only goes back a decade in time. As part of his plan to take power, he makes one very positive change that is ultimately for his own benefit; [[spoiler:using his future knowledge, Ba'al retrieves the corpse of Charlie O'Neill after his accidental death (leaving a dead clone in Charlie's place), and brings him back to life in a sarcophagus, intending to use Charlie as a hostage to force Jack O'Neill to obey him]].
* ''Fanfic/GogglesAndTheTears'', being
''Fanfic/GogglesAndTheTears'': Being a TimeTravel crossover, the fic is set up as a final chance to defeat [[AIIsACrapshoot SHODAN]] before she uses [[VideoGame/BioshockInfinite Elizabeth]] to take over the multiverse. A majority of the story involves a trip to Columbia, and one chapter named after this trope involves Booker [=DeWitt=], Elizabeth, and a Vox Populi member detouring to Finkton to rescue Chen Lin before Jeremiah Fink [[spoiler: kills him again]]. By Booker distracting Fink in a firefight, Elizabeth manages to sneak Lin out to his gun shop. This allows the Vox to properly get their weapons, resulting in the Vox [[BigDamnHeroes allying themselves in the fight against]] SHODAN instead of trying to kill Booker. [[spoiler: It turns out that the chapter played out this way because of the G-Man, who had been fed up with the Luteces running Booker through the same scenario 122 times.]]
* Yet another ''Evangelion'' example comes ''Fanfic/StormOnTheHorizon'':
** On the ''VideoGame/LifeIsStrange'' side of the crossover, after becoming immortal and officially dead, Max used her powers to set Arcadia Bay right. She murdered [[spoiler:Mark Jefferson]] (and seemed to enjoy it, given that she rewound five or six times just so she could do it again), exposed Sean Prescott's financial crimes, and got Nathan and David into treatment programs. The butterfly effect also prevented the death of Chloe's father William as a pleasant side effect. As a result, both Rachel Amber and Chloe Price lived, with Chloe, instead of a rebellious punk whose life was falling apart, becoming an A student and even a member of the Vortex Club for a time. As an adult, she went on to marry a Hollywood lawyer [[spoiler:named Neil Sobeck and give birth to a daughter named Elisabet... whose work made Faro Automated Solutions into a MegaCorp and put it in a position where it could accidentally [[RobotWar destroy the world]]]]. [[UnwittingInstigatorOfDoom Oops.]]
** Max regularly uses her powers to "correct" herself. Aloy is initially quite disturbed, but gets used to it.
** On the ''VideoGame/HorizonZeroDawn'' side, meanwhile, Aloy uses her foreknowledge to pull a PeggySue. First, she prevents Olin and HADES from learning about her, which led to the massacre at the Proving and Rost's death
in the form original timeline, by having Max lead him away to drink and gamble. Without the Proving massacre, she instead gets made Seeker after winning the Proving and requesting, as her boon, to go into All-Mother Mountain in order to meet her mother, where the scanner recognizes her as Elisabet Sobeck just as it did in the original timeline. Without Olin spotting her and reporting her back to HADES, Aloy gets the jump on the Eclipse, [[spoiler:killing Helis at the Ring of ''Fanfic/GoingAnotherWay'', Metal instead of much later at the Battle of Meridian]].
* An omake for ''Fanfic/WhiteDevilOfTheMoon'' had [[Franchise/SailorMoon Chibi-usa]] (Or rather, a [[Franchise/LyricalNanoha Nanohaesque]] version of Chibi-usa) travel back in time, believing she was doing
this trope by making sure Nanoha never met Fate. Cue Vivio, who believes that by preventing Chibi-usa from doing that, ''she'' was doing this trope. [[spoiler:Vivio won.]]

[[AC:''Film/{{Descendants}}'']]
* ''[[https://www.fanfiction.net/s/12625357/ Rewrite the Past]]'': The Core Four plus Dizzy and a comatose Ben go back in time. A "purity of heart" requirement is the explanation Mal gives as to why Maleficent never used the spell they use for the jump. They end up landing on the Isle in five-year-old bodies (one in Dizzy's case)... while Jane and Lonnie (who had died in the previous future) also come back in five-year-old bodies and land at Auradon Prep. Jane leads Lonnie and Dude (in puppy form, which the two encounter along the way) to her place as it was closest. The first adult to know about the time travel is Lumiere, who had been with the group when they performed the spell. Notably, because the Core Four (plus Dizzy) are already at Auradon (Ben had refused to leave the Isle without them), Ben only announces three villain kids in his first official proclamation; he had entered expecting his parents to react the same way they did in canon, and even singled out Gil as the one to get the reaction Mal did in canon due to his parents' personal history with Gaston.

[[AC:''Franchise/GameOfThrones'' / ''Franchise/ASongOfIceAndFire'']]
* This is a fairly common FandomSpecificPlot for ASOIAF fics, with the White Walkers succeeding in bringing the Long Night and destroying Westeros, and various characters being sent back through
time through [[spoiler:Rei Ayanami, [[MyGodWhatHaveIDone horrified at what various means (the Old Gods, the Third Impact truly wrought]], going back in time to change a few things around Three Eyed Raven, etc) in order to prevent try and avert this from happening.
* In
the disaster. The biggest PeggySue fanfic ''Fanfic/RobbReturns'', this is the Old Gods' purpose in sending Robb back in time.

[[AC:Franchise/MarvelCinematicUniverse]]
* ''Fanfic/BornOfTheSameImpulse'': Stephen uses the Time Stone to send both himself and Tony on a MentalTimeTravel to
change she history and save the universe from Thanos. They found themselves back in 2015, just as Tony and Bruce are set to create Ultron. Tony uses this opportunity to fix the mistakes he made was influencing Gendo Ikari's thoughts subtly enough during the events of ''Film/AvengersAgeOfUltron'' all the way to make ''Film/CaptainAmericaCivilWar'', first by rewriting Ultron's code and repurposing him leave Shinji in into Vision, and by confronting Steve about his parents' death, thus preventing the care of Yui's brother so as to ensure Shinji would be less of an emotional wreck]]. Everyone gets occasional flashes to their previous lives in dreams meanwhile.
* In ''VideoGame/HetaOni'', [[spoiler:Italy has been rewinding time again and again so that everyone can get out
breaking of the HauntedHouse alive]].
* A very common goal of certain loopers in ''Fanfic/TheInfiniteLoops'' is to prevent something that went wrong in baseline.
Avengers.

[[AC:''WesternAnimation/MiraculousLadybug'']]



* ''Fanfic/LieInReverse'': Like in canon, teen Sasuke is out of his mind over his grief for Itachi. So, when his younger self summons him to the past, teen Sasuke will do anything to ensure his brother's survival and avenge him, i.e., raze Konoha to the ground and eliminate the corrupt politicians who forced him to kill the Uchiha Clan. He mostly succeeds -- he kills Danzo and, by threatening the Third Hokage (who still dies in the Suna/Oto Invasion), he gets Itachi to be reinstated and the other councilors to be demoted. Furthermore, Sasuke's younger self is never marked by Orochimaru nor he abandons the village. Unwittingly, teen Sasuke's actions also impact positively preteen Sasuke, mostly because the latter realizes how rude, cruel, obsessed, and overall unhappy he will become. This results in him appreciating his team and slowly but surely healing from his trauma.
* In the ''Series/{{Smallville}}'' fic ''Fanfic/NewBeginningsSmallville'', when Clark uses the Legion Ring to reset time to stop Linda Lake, Lois steps in and causes them both to be sent back to the time of the pilot episode (although Lois goes into a coma and initially assumes it was all a dream before she is sent to Smallville and meets Clark directly). With his new advance knowledge, Clark is able to easily defeat many of his early opponents and assemble the Fortress of Solitude ahead of schedule, as well as gather the Justice League into an official team a year or so in advance (as well as [[spoiler:save Kyla, Alicia, Tim and Wes to become heroes themselves]]).
* ''Fanfic/OnceMoreWithFeeling'': [[PhysicalGod Lilith]] misunderstands [[WoobieDestroyerOfWorlds Shinji]] when he says he wants to go back, and she sends him back in time. Shinji gets shocked but he decides that he will use that chance nevertheless to [[TheAtoner atone for everything that he did and did not]]]. He is so determined to win the Angel War, protect his surrogate family and make amends that his behaviour gets [[ParentalSubstitute Misato]] puzzled, since she does not understand why [[ChronicHeroSyndrome he goes out of his way to help everyone and make them happy]] (and he cannot tell her he feels [[SurvivorGuilt guilty]] [[MyGodWhatHaveIDone for leaving her, Asuka and Rei dying]] and [[ItsAllMyFault obliterating the whole humankind]]).
* {{Subverted}} in ''[[http://www.fanfiction.net/s/2149801/1/Out-of-Time Out of Time]]'' when a time traveling [[Manga/RurouniKenshin Kenshin]] considers trying to [[spoiler:save Tomoe]], but discards it when he considers how the timeline could be screwed up (and then finds out he's arrived at too late a time to change it anyway). Also subverted by [[spoiler:Saito]], who not only doesn't try to change the status quo despite the opportunity and motive, but risks his life attempting to keep it instead.
* In ''Fanfic/PokemonResetBloodlines'', Cyrus succeeds in learning how to manipulate reality and destroys the entire universe, erasing everything and everyone from existence. Arceus manages to save Ash before he disappears too, sending him back to the past [[PeggySue with his memories intact]] so he can prevent it from happening. However, the timeline is rewritten in the process, and many things end up changing, [[CloseEnoughTimeline creating an entirely different universe]].

to:

* ''Fanfic/LieInReverse'': Like in canon, teen Sasuke is out of ''Fanfic/SpellboundLilafly'': Félix eventually learns that his mind over his grief for Itachi. So, when his younger self summons him to the past, teen Sasuke will do anything to ensure his brother's survival and avenge him, i.e., raze Konoha to the ground and eliminate the corrupt politicians who forced him to kill the Uchiha Clan. He mostly succeeds -- he kills Danzo and, by threatening the Third Hokage (who still dies in the Suna/Oto Invasion), he gets Itachi to be reinstated and the other councilors to be demoted. Furthermore, Sasuke's younger self is never marked by Orochimaru nor he abandons the village. Unwittingly, teen Sasuke's actions also impact positively preteen Sasuke, mostly because the latter realizes how rude, cruel, obsessed, and overall unhappy he will become. This results in him appreciating his team and slowly but surely healing from his trauma.
* In the ''Series/{{Smallville}}'' fic ''Fanfic/NewBeginningsSmallville'', when Clark uses the Legion Ring to reset time to stop Linda Lake, Lois steps in and causes them both to be sent back to the time of the pilot episode (although Lois goes into a coma and initially assumes it was all a dream before she is sent to Smallville and meets Clark directly). With his new advance knowledge, Clark is able to easily defeat many of his early opponents and assemble the Fortress of Solitude ahead of schedule, as well as gather the Justice League into an official team a year or so in advance (as well as [[spoiler:save Kyla, Alicia, Tim and Wes to become heroes themselves]]).
* ''Fanfic/OnceMoreWithFeeling'': [[PhysicalGod Lilith]] misunderstands [[WoobieDestroyerOfWorlds Shinji]] when he says he
father wants to go back, and she sends him back in time. Shinji gets shocked but he decides use the Wish to [[spoiler:undo the creation of the fae (which also involved a Wish). It's implied that he will use that chance nevertheless to [[TheAtoner atone for everything that he did and did not]]]. He is so determined to win this would result in restoring the Angel War, protect his surrogate family and make amends that his behaviour gets [[ParentalSubstitute Misato]] puzzled, since she does not understand why [[ChronicHeroSyndrome he goes out of his way to help everyone and make them happy]] (and he cannot tell her he feels [[SurvivorGuilt guilty]] [[MyGodWhatHaveIDone for leaving her, Asuka and Rei dying]] and [[ItsAllMyFault obliterating the whole humankind]]).
* {{Subverted}} in ''[[http://www.fanfiction.net/s/2149801/1/Out-of-Time Out of Time]]'' when a time traveling [[Manga/RurouniKenshin Kenshin]] considers trying to [[spoiler:save Tomoe]], but discards it when he considers how the timeline could be screwed up (and then finds out he's arrived at too late a time to change it anyway). Also subverted by [[spoiler:Saito]], who not only doesn't try to change the status quo despite the opportunity and motive, but risks his life attempting to keep it instead.
* In ''Fanfic/PokemonResetBloodlines'', Cyrus succeeds in learning how to manipulate reality and destroys the entire universe, erasing everything and everyone from existence. Arceus manages to save Ash before he disappears too, sending him back to the past [[PeggySue with his memories intact]] so he can prevent it from happening. However, the timeline is rewritten in the process, and many things end up changing, [[CloseEnoughTimeline creating an entirely different universe]].
canon timeline]].

[[AC:''Franchise/MyLittlePony'']]



* ''[[https://www.fanfiction.net/s/10316270/1/Too-Far Too Far]]'': [[spoiler:Diamond Tiara accepts a [[DealWithTheDevil deal with Discord]] to get a do over and avoid causing Dinky to be DrivenToSuicide by her bullying (which finally caused Diamond to realize her actions have consequences).]]
* ''Fanfic/TwilightThenTwilightNowUniverse'' fanfic ''The Magnificent Six'': This is the villain's big plot, and it is used to divide the new Elements of Harmony: [[spoiler:Applejack, being the original [[WesternAnimation/MyLittlePonyFriendshipIsMagic Element of Honesty]], is swayed to join the villain and stop the {{Gotterdammerung}} that resulted in the current present. The other five, being native born to the present, find this insulting and horrifying and fight her to stop her going through with it. GreyAndGrayMorality is invoked because, as much as it's only natural the mortal elements would want to preserve their own existence, Applejack has an unquestionable point that the present is a ''[[CrapSackWorld nightmare]]'' compared to the [[SugarBowl Equestria when she was born]], and so one has to wonder if undoing the BadFuture (from Applejack's perspective) is really so wrong.]]
* ''[[https://www.fimfiction.net/story/302805/would-it-be-worth-it Would It Be Worth It]]'': During the Season 5 finale, Twilight decides to go back even further than [[MakeWrongWhatOnceWentRight Starlight did]] to stop Our Town from ever existing and thus negate her entire reason for her revenge plot. [[spoiler:Ultimately averted, as her own future self does this trope to warn her that [[ButterflyOfDoom doing so would end no different than Starlight's plans and bring about a]] BadFuture even worse than the ones Starlight made. [[NothingIsScarier Said future is never shown,]] but it's implied that her Spike ended up not making it back and that Starlight or Twilight herself is the villain the alteration would let take over.]]

[[AC:''Franchise/{{Naruto}}'']]
* ''Fanfic/LieInReverse'': Like in canon, teen Sasuke is out of his mind over his grief for Itachi. So, when his younger self summons him to the past, teen Sasuke will do anything to ensure his brother's survival and avenge him, i.e., raze Konoha to the ground and eliminate the corrupt politicians who forced him to kill the Uchiha Clan. He mostly succeeds -- he kills Danzo and, by threatening the Third Hokage (who still dies in the Suna/Oto Invasion), he gets Itachi to be reinstated and the other councilors to be demoted. Furthermore, Sasuke's younger self is never marked by Orochimaru nor he abandons the village. Unwittingly, teen Sasuke's actions also impact positively preteen Sasuke, mostly because the latter realizes how rude, cruel, obsessed, and overall unhappy he will become. This results in him appreciating his team and slowly but surely healing from his trauma.

[[AC:''Franchise/NeonGenesisEvangelion'']]
* ''Fanfic/ACrownOfStars'': [[BigGood Daniel]] travels back and forward in time bringing Shinji and Asuka along with him to fix the mistakes of the past.

[[AC:''Franchise/{{Pokemon}}'']]
* ''Fanfic/PokemonResetBloodlines'': Cyrus succeeds in learning how to manipulate reality and destroys the entire universe, erasing everything and everyone from existence. Arceus manages to save Ash before he disappears too, sending him back to the past [[PeggySue with his memories intact]] so he can prevent it from happening. However, the timeline is rewritten in the process, and many things end up changing, [[CloseEnoughTimeline creating an entirely different universe]].

[[AC:Manga/RurouniKenshin]]
* ''[[http://www.fanfiction.net/s/2149801/1/Out-of-Time Out of Time]]'': {{Subverted}} when a time traveling Kenshin considers trying to [[spoiler:save Tomoe]], but discards it when he considers how the timeline could be screwed up (and then finds out he's arrived at too late a time to change it anyway). Also subverted by [[spoiler:Saito]], who not only doesn't try to change the status quo despite the opportunity and motive, but risks his life attempting to keep it instead.

[[AC:''Franchise/{{Stargate}}'']]
* In the ''Series/StargateAtlantis'' fic "[[https://archiveofourown.org/works/16195013/ The Second Failsafe]]", after meeting the time-displaced Elizabeth Weir, Janus became aware that in the new timeline created by her actions, Atlantis would survive but Doctor Weir would be killed by the Asurans. In order to prevent this, he travelled into the past and impregnated a teenage Elizabeth in the hope that their daughter would be able to change things for the better, Ultimately Everleigh Weiland (Elizabeth's father had the girl given up for adoption but she was assigned to Atlantis by the NID) is able to [[spoiler:stop Michael becoming a threat and insert a kill-code into the Asurans, but at the cost that she ultimately sacrifices herself to save Atlantis, although Janus is able to help Everleigh Ascend]].

[[AC:''Literature/{{Worm}}'']]








[[AC:Unsorted]]
* In the ''TabletopGame/Warhammer40000'' Fanfic/Roleplay by post story ''[[http://1d4chan.org/wiki/Abaddon#Abaddon.27s_14th_Black_Crusade Abaddon Quest]]'', there's a rather amusing [[InvertedTrope Inversion]], the eponymous Chaos Lord and his flunkies travel back in time to kill the GodEmperor as a baby, which is to say they travel back to MakeWrongWhatOnceWentRight. Considering [[Website/FourChan /tg/'s]] [[GeneralFailure opinion]] of Abaddon, FailureIsTheOnlyOption. As is [[HilarityEnsues Hilarity.]]
* In the ''Literature/{{Animorphs}}'' fic ''[[https://www.fanfiction.net/s/628665/1/Animorphs-55-The-End Animorphs 55: The End]]'', after the deaths of the other Animorphs, Cassie (on the not-advice of the Ellimist) [[spoiler:retrieves the Time Matrix and essentially blackmails the Ellimist and Crayak to reset the timeline to change the outcome of the final battle with the Yeerks. As a result, Rachel is saved, Ax directly kills Visser One after the Yeerk tries to escape by leaving Alloran, and Tobias retains his ability to morph even after he gets 'stuck' in human form, but Jake's parents are killed when their Yeerks refuse to surrender]].
* Happens ''a lot'' in ''Series/BuffyTheVampireSlayer'' fics. The time traveler is usually either Buffy, Spike or Angel. Rare cases in include Dawn (like in this fic ''[[https://www.fanfiction.net/s/10814693/1/Breaking-Novikov Breaking Novikov]]'') and Xander (like in this fic ''[[https://www.fanfiction.net/s/11103312/1/Seeds-of-Time Seeds of Time]]''). Almost all time travel fics happen in order to change the events of the past (mainly Buffy's second death, thus erasing seasons 6 & 7) and most likely than not, getting a certain pairing together (especially Spuffy).
** A particularly distinctive example of this occurs in the ''Series/{{Angel}}'' fic ''[[https://www.fanfiction.net/s/1215322/1/Impact Impact]]'', when Cordelia, through sheer chance, is sent back from just before Darla gives birth ("[[Recap/AngelS03E07Offspring Offspring]]") to just before Doyle’s death ("[[Recap/AngelS01E09Hero Hero]]"). She immediately seizes on the opportunity to undo Doyle's death, [[spoiler:and even leaves notes for her past self so that Angel Investigations can avoid the worst of the challenges they’ll face in the future once she returns home]].
* In the ''[[http://archiveofourown.org/series/568186 Changing tides]]'' series, Laurel brings her past self, Diggle, Tommy, Roy, and Thea 16 years into the future. She then shows them the first two years of Oliver's exile, the first two years of his return (both are shown as videos made by downloading memories), and finally tells them details that happened after and as a result of the events of those early years. This is done in the hope that this knowledge will allow them to prevent the worst of the tragedies that await them. The third installment, deals with them having been sent back to their original time and starting to attempt to do exactly that.
* In the ''Film/AvengersInfinityWar'' fic ''[[https://archiveofourown.org/works/21216794/chapters/50511512 Checkmate]]'', after Thanos has left Titan with the Time Stone, Tony suggests that they use a device he created back on Earth that can project an individual's consciousness back in time to essentially possess their past self; with this plan proposed, Peter Parker is chosen to be the one sent back, projecting himself back to 2015 (shortly after the events of [[Film/AvengersAgeOfUltron the Battle of Sokovia]]) to warn the Avengers of Thanos's ambitions.
* ''Fanfic/DoingItRightThisTime'': As usual in ''Evangelion'' PeggySue stories, one of the primary goals of Shinji, Asuka and Rei is averting TheEndOfTheWorldAsWeKnowIt. Another goal is fixing the unholy mess that was their relationship and learning to get along better with each other (which will lead to unexpected results known as the [[OneTrueThreesome "Israfel Special"]]).
* ''Fanfic/TheElementOfTime'': After things epically head south in the final battle against the Juubi, Naruto is given the chance to travel back in time and fix everything by a powerful interdimensional warrior named Felix Yoshoryuu. With help from this warrior, plus multiple allies that later join the cause, he sets off to save as many people and foil as much evil as he can in his newly granted second chance. But unfortunately, with this time travel having inspired a powerful threat from the same interdimensional world as Felix to attempt his own devastating plans for the ninja world, it soon becomes clear that this new timeline will come with just as many dangers (if not more) as there were before.
* The ''Series/StargateSG1'' fic "[[https://www.fanfiction.net/s/4734058/1/Ending-Before-We-Begin Ending Before We Begin]]" features another of Ba'al's clones attempting a variation of the original's plan in ''Film/StargateContinuum''; rather than go back a few decades and deprive Earth of the Stargate, he instead only goes back a decade in time. As part of his plan to take power, he makes one very positive change that is ultimately for his own benefit; [[spoiler:using his future knowledge, Ba'al retrieves the corpse of Charlie O'Neill after his accidental death (leaving a dead clone in Charlie's place), and brings him back to life in a sarcophagus, intending to use Charlie as a hostage to force Jack O'Neill to obey him]].
* Yet another ''Evangelion'' example comes in the form of ''Fanfic/GoingAnotherWay'', this time through [[spoiler:Rei Ayanami, [[MyGodWhatHaveIDone horrified at what the Third Impact truly wrought]], going back in time to change a few things around in order to prevent the disaster. The biggest change she made was influencing Gendo Ikari's thoughts subtly enough to make him leave Shinji in the care of Yui's brother so as to ensure Shinji would be less of an emotional wreck]]. Everyone gets occasional flashes to their previous lives in dreams meanwhile.
* In ''VideoGame/HetaOni'', [[spoiler:Italy has been rewinding time again and again so that everyone can get out of the HauntedHouse alive]].
* A very common goal of certain loopers in ''Fanfic/TheInfiniteLoops'' is to prevent something that went wrong in baseline.
* In the ''Series/{{Smallville}}'' fic ''Fanfic/NewBeginningsSmallville'', when Clark uses the Legion Ring to reset time to stop Linda Lake, Lois steps in and causes them both to be sent back to the time of the pilot episode (although Lois goes into a coma and initially assumes it was all a dream before she is sent to Smallville and meets Clark directly). With his new advance knowledge, Clark is able to easily defeat many of his early opponents and assemble the Fortress of Solitude ahead of schedule, as well as gather the Justice League into an official team a year or so in advance (as well as [[spoiler:save Kyla, Alicia, Tim and Wes to become heroes themselves]]).
* ''Fanfic/OnceMoreWithFeeling'': [[PhysicalGod Lilith]] misunderstands [[WoobieDestroyerOfWorlds Shinji]] when he says he wants to go back, and she sends him back in time. Shinji gets shocked but he decides that he will use that chance nevertheless to [[TheAtoner atone for everything that he did and did not]]]. He is so determined to win the Angel War, protect his surrogate family and make amends that his behaviour gets [[ParentalSubstitute Misato]] puzzled, since she does not understand why [[ChronicHeroSyndrome he goes out of his way to help everyone and make them happy]] (and he cannot tell her he feels [[SurvivorGuilt guilty]] [[MyGodWhatHaveIDone for leaving her, Asuka and Rei dying]] and [[ItsAllMyFault obliterating the whole humankind]]).



* ''Fanfic/SpellboundLilafly'': Félix eventually learns that his father wants to use the Wish to [[spoiler:undo the creation of the fae (which also involved a Wish). It's implied that this would result in restoring the canon timeline]].
* In the ''Literature/ASongOfIceAndFire'' PeggySue fanfic ''Fanfic/RobbReturns'', this is the Old Gods' purpose in sending Robb back in time.
** This is a fairly common FandomSpecificPlot for ASOIAF fics, with the White Walkers succeeding in bringing the Long Night and destroying Westeros, and various characters being sent back through time through various means (the Old Gods, the Three Eyed Raven, etc) in order to try and avert this from happening.
** ''Fanfic/TheRavensPlan'' is probably the crowning example, however, as Bran and Melisandre carry out a ritual to send a group of core characters back in order to avert the War of the Five Kings and other conflicts which weakened Westeros before the Night King's assault. However, it ends up [[GoneHorriblyRight working too well]], with the spell being supercharged and causing hundreds (if not ''thousands'') of people beyond the intended ones remembering.

to:

* ''Fanfic/SpellboundLilafly'': Félix eventually learns that his father wants to use the Wish to [[spoiler:undo the creation of the fae (which also involved a Wish). It's implied that this would result in restoring the canon timeline]].
* In the ''Literature/ASongOfIceAndFire'' PeggySue fanfic ''Fanfic/RobbReturns'', this is the Old Gods' purpose in sending Robb back in time.
** This is a fairly common FandomSpecificPlot for ASOIAF fics, with the White Walkers succeeding in bringing the Long Night and destroying Westeros, and various characters being sent back through time through various means (the Old Gods, the Three Eyed Raven, etc) in order to try and avert this from happening.
**
''Fanfic/TheRavensPlan'' is probably the crowning example, however, as Bran and Melisandre carry out a ritual to send a group of core characters back in order to avert the War of the Five Kings and other conflicts which weakened Westeros before the Night King's assault. However, it ends up [[GoneHorriblyRight working too well]], with the spell being supercharged and causing hundreds (if not ''thousands'') of people beyond the intended ones remembering.



* In the ''Series/StargateAtlantis'' fic "[[https://archiveofourown.org/works/16195013/ The Second Failsafe]]", after meeting the time-displaced Elizabeth Weir, Janus became aware that in the new timeline created by her actions, Atlantis would survive but Doctor Weir would be killed by the Asurans. In order to prevent this, he travelled into the past and impregnated a teenage Elizabeth in the hope that their daughter would be able to change things for the better, Ultimately Everleigh Weiland (Elizabeth's father had the girl given up for adoption but she was assigned to Atlantis by the NID) is able to [[spoiler:stop Michael becoming a threat and insert a kill-code into the Asurans, but at the cost that she ultimately sacrifices herself to save Atlantis, although Janus is able to help Everleigh Ascend]].



* ''Fanfic/StormOnTheHorizon'':
** On the ''VideoGame/LifeIsStrange'' side of the crossover, after becoming immortal and officially dead, Max used her powers to set Arcadia Bay right. She murdered [[spoiler:Mark Jefferson]] (and seemed to enjoy it, given that she rewound five or six times just so she could do it again), exposed Sean Prescott's financial crimes, and got Nathan and David into treatment programs. The butterfly effect also prevented the death of Chloe's father William as a pleasant side effect. As a result, both Rachel Amber and Chloe Price lived, with Chloe, instead of a rebellious punk whose life was falling apart, becoming an A student and even a member of the Vortex Club for a time. As an adult, she went on to marry a Hollywood lawyer [[spoiler:named Neil Sobeck and give birth to a daughter named Elisabet... whose work made Faro Automated Solutions into a MegaCorp and put it in a position where it could accidentally [[RobotWar destroy the world]]]]. [[UnwittingInstigatorOfDoom Oops.]]
** Max regularly uses her powers to "correct" herself. Aloy is initially quite disturbed, but gets used to it.
** On the ''VideoGame/HorizonZeroDawn'' side, meanwhile, Aloy uses her foreknowledge to pull a PeggySue. First, she prevents Olin and HADES from learning about her, which led to the massacre at the Proving and Rost's death in the original timeline, by having Max lead him away to drink and gamble. Without the Proving massacre, she instead gets made Seeker after winning the Proving and requesting, as her boon, to go into All-Mother Mountain in order to meet her mother, where the scanner recognizes her as Elisabet Sobeck just as it did in the original timeline. Without Olin spotting her and reporting her back to HADES, Aloy gets the jump on the Eclipse, [[spoiler:killing Helis at the Ring of Metal instead of much later at the Battle of Meridian]].



* [[https://www.fanfiction.net/s/10316270/1/Too-Far "Too Far"]] has [[spoiler:Diamond Tiara accept a [[DealWithTheDevil deal with Discord]] to get a do over and avoid causing Dinky to be DrivenToSuicide by her bullying (which finally caused Diamond to realize her actions have consequences).]]
* In ''Fanfic/TwilightThenTwilightNowUniverse'' fanfic ''The Magnificent Six'', this is the villain's big plot, and it is used to divide the new Elements of Harmony: [[spoiler:Applejack, being the original [[WesternAnimation/MyLittlePonyFriendshipIsMagic Element of Honesty]], is swayed to join the villain and stop the {{Gotterdammerung}} that resulted in the current present. The other five, being native born to the present, find this insulting and horrifying and fight her to stop her going through with it. GreyAndGrayMorality is invoked because, as much as it's only natural the mortal elements would want to preserve their own existence, Applejack has an unquestionable point that the present is a ''[[CrapSackWorld nightmare]]'' compared to the [[SugarBowl Equestria when she was born]], and so one has to wonder if undoing the BadFuture (from Applejack's perspective) is really so wrong.]]
* An omake for ''Fanfic/WhiteDevilOfTheMoon'' had [[Franchise/SailorMoon Chibi-usa]] (Or rather, a [[Franchise/LyricalNanoha Nanohaesque]] version of Chibi-usa) travel back in time, believing she was doing this trope by making sure Nanoha never met Fate. Cue Vivio, who believes that by preventing Chibi-usa from doing that, ''she'' was doing this trope. [[spoiler:Vivio won.]]
* In ''[[https://www.fimfiction.net/story/302805/would-it-be-worth-it Would It Be Worth It]]'', during the Season 5 finale, Twilight decides to go back even further than [[MakeWrongWhatOnceWentRight Starlight did]] to stop Our Town from ever existing and thus negate her entire reason for her revenge plot. [[spoiler:Ultimately averted, as her own future self does this trope to warn her that [[ButterflyOfDoom doing so would end no different than Starlight's plans and bring about a]] BadFuture even worse than the ones Starlight made. [[NothingIsScarier Said future is never shown,]] but it's implied that her Spike ended up not making it back and that Starlight or Twilight herself is the villain the alteration would let take over.]]
* In ''Fanfic/BornOfTheSameImpulse'', Stephen uses the Time Stone to send both himself and Tony on a MentalTimeTravel to change history and save the universe from Thanos. They found themselves back in 2015, just as Tony and Bruce are set to create Ultron. Tony uses this opportunity to fix the mistakes he made during the events of ''Film/AvengersAgeOfUltron'' all the way to ''Film/CaptainAmericaCivilWar'', first by rewriting Ultron's code and repurposing him into Vision, and by confronting Steve about his parents' death, thus preventing the breaking of the Avengers.



* Descendants story ''Rewrite the Past'' has the Core Four plus Dizzy and a comatose Ben go back in time. A "purity of heart" requirement is the explanation Mal gives as to why Maleficent never used the spell they use for the jump. They end up landing on the Isle in five-year-old bodies (one in Dizzy's case)... while Jane and Lonnie (who had died in the previous future) also come back in five-year-old bodies and land at Auradon Prep. Jane leads Lonnie and Dude (in puppy form, which the two encounter along the way) to her place as it was closest. The first adult to know about the time travel is Lumiere, who had been with the group when they performed the spell. Notably, because the Core Four (plus Dizzy) are already at Auradon (Ben had refused to leave the Isle without them), Ben only announces three villain kids in his first official proclamation; he had entered expecting his parents to react the same way they did in canon, and even singled out Gil as the one to get the reaction Mal did in canon due to his parents' personal history with Gaston.
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* The ''Series/StargateSG1'' fic "[[https://www.fanfiction.net/s/4734058/1/Ending-Before-We-Begin Ending Before We Begin]]" features another of Ba'al's clones attempting a variation of the original's plan in ''Film/StargateContinuum''; rather than go back a few decades and deprive Earth of the Stargate, he instead only goes back a decade in time. As part of his plan to take power, he makes one very positive change that is ultimately for his own benefit; [[spoiler:using his future knowledge, Ba'al retrieves the corpse of Charlie O'Neill after his accidental death (leaving a dead clone in Charlie's place), and brings him back to life in a sarcophagus, intending to use Charlie as a hostage to force Jack O'Neill to obey him]].
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* In the ''Series/StargateAtlantis'' fic "[[https://archiveofourown.org/works/16195013/ The Second Failsafe]]", after meeting the time-displaced Elizabeth Weir, Janus became aware that in the new timeline created by her actions, Atlantis would survive but Doctor Weir would be killed by the Asurans. In order to prevent this, he travelled into the past and impregnated a teenage Elizabeth in the hope that their daughter would be able to change things for the better, Ultimately Everleigh Weiland (Elizabeth's father had the girl given up for adoption but she was assigned to Atlantis by the NID) is able to [[spoiler:stop Michael becoming a threat and insert a kill-code into the Asurans, but at the cost that she ultimately sacrifices herself to save Atlantis, although Janus is able to help Everleigh Ascend]].
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* ''Fanfic/WesleysMulligan'': A misplaced time travel spell sends Wesley back in time from season five of ''Series/{{Angel}}'' to season 3 of the original show, when he was a vastly different person. He uses his knowledge of the past and improved strategy, fighting skills, and ruthless pragmatism to SetRightWhatOnceWentWrong, both in small ways like stopping some minor villains a little earlier and in big ways like trying to save Fred from Pylea early and keep Faith from ever losing her way. [[/folder]]
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* {{Subverted}} in ''Manga/ReTake''. [[spoiler:Shinji of [[Anime/NeonGenesisEvangelion End of Evangelion]] wakes up in the past, just after the battle with Leliel. He tries to set right everything that went wrong to prevent the End of Evangelion. It turns out he's only making life better for an alternate version of himself, and there's nothing he can do to change that. He eventually accepts it, and returns to the CrapsackWorld future he belongs to. Though there is an implication of a HappyEnding for him, so it's all good.]]

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* {{Subverted}} in ''Manga/ReTake''. [[spoiler:Shinji of [[Anime/NeonGenesisEvangelion ''[[Anime/NeonGenesisEvangelion End of Evangelion]] Evangelion]]'' wakes up in the past, just after the battle with Leliel. He tries to set right everything that went wrong to prevent the End of Evangelion. It turns out he's only making life better for an alternate version of himself, and there's nothing he can do to change that. He eventually accepts it, and returns to the CrapsackWorld future he belongs to. Though there is an implication of a HappyEnding for him, so it's all good.]]
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* ''Fanfic/LieInReverse'': Like in canon, teen Sasuke is out of his mind over his grief for Itachi. So, when his younger self summons him to the past, teen Sasuke will do anything to ensure his brother's survival and avenge him, i.e., raze Konoha to the ground and eliminate the corrupt politicians who forced him to kill the Uchiha Clan. He mostly succeeds -- he kills Danzo and, by threatening the Third Hokage (who still dies in the Suna/Oto Invasion), he gets Itachi to be reinstated and the other councilors to be demoted. Furthermore, Sasuke's younger self is never marked by Orochimaru nor he abandons the village. Unwittingly, teen Sasuke's actions also impact positively preteen Sasuke, mostly because the latter realizes how rude, cruel, obsessed, and overall unhappy he will become. This results in him appreciating his team and slowly but surely healing from his trauma.
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[[SetRightWhatOnceWentWrong Setting Right What Once Went Wrong]] in FanWorks

[[folder:Series Plots]]
* In the ''TabletopGame/Warhammer40000'' Fanfic/Roleplay by post story ''[[http://1d4chan.org/wiki/Abaddon#Abaddon.27s_14th_Black_Crusade Abaddon Quest]]'', there's a rather amusing [[InvertedTrope Inversion]], the eponymous Chaos Lord and his flunkies travel back in time to kill the GodEmperor as a baby, which is to say they travel back to MakeWrongWhatOnceWentRight. Considering [[Website/FourChan /tg/'s]] [[GeneralFailure opinion]] of Abaddon, FailureIsTheOnlyOption. As is [[HilarityEnsues Hilarity.]]
* In the ''Literature/{{Animorphs}}'' fic ''[[https://www.fanfiction.net/s/628665/1/Animorphs-55-The-End Animorphs 55: The End]]'', after the deaths of the other Animorphs, Cassie (on the not-advice of the Ellimist) [[spoiler:retrieves the Time Matrix and essentially blackmails the Ellimist and Crayak to reset the timeline to change the outcome of the final battle with the Yeerks. As a result, Rachel is saved, Ax directly kills Visser One after the Yeerk tries to escape by leaving Alloran, and Tobias retains his ability to morph even after he gets 'stuck' in human form, but Jake's parents are killed when their Yeerks refuse to surrender]].
* Happens ''a lot'' in ''Series/BuffyTheVampireSlayer'' fics. The time traveler is usually either Buffy, Spike or Angel. Rare cases in include Dawn (like in this fic ''[[https://www.fanfiction.net/s/10814693/1/Breaking-Novikov Breaking Novikov]]'') and Xander (like in this fic ''[[https://www.fanfiction.net/s/11103312/1/Seeds-of-Time Seeds of Time]]''). Almost all time travel fics happen in order to change the events of the past (mainly Buffy's second death, thus erasing seasons 6 & 7) and most likely than not, getting a certain pairing together (especially Spuffy).
** A particularly distinctive example of this occurs in the ''Series/{{Angel}}'' fic ''[[https://www.fanfiction.net/s/1215322/1/Impact Impact]]'', when Cordelia, through sheer chance, is sent back from just before Darla gives birth ("[[Recap/AngelS03E07Offspring Offspring]]") to just before Doyle’s death ("[[Recap/AngelS01E09Hero Hero]]"). She immediately seizes on the opportunity to undo Doyle's death, [[spoiler:and even leaves notes for her past self so that Angel Investigations can avoid the worst of the challenges they’ll face in the future once she returns home]].
* The plot of [[GetBackToTheFuture "Time Terror"]], an episode of ''Fanfic/CalvinAndHobbesTheSeries'', involves Calvin trying to rescue his friends from different time periods before time gets screwed up.
** Also used in "Super Calvin" by [[spoiler:''Hobbes'', of all people, when he learns that Calvin's new superpowers are a DeadlyUpgrade.]]
** Then there's the very end of "Thunderstorm", where [[spoiler:[[ResetButton everything that happened in the special is undone.]]]]
* In the ''[[http://archiveofourown.org/series/568186 Changing tides]]'' series, Laurel brings her past self, Diggle, Tommy, Roy, and Thea 16 years into the future. She then shows them the first two years of Oliver's exile, the first two years of his return (both are shown as videos made by downloading memories), and finally tells them details that happened after and as a result of the events of those early years. This is done in the hope that this knowledge will allow them to prevent the worst of the tragedies that await them. The third installment, deals with them having been sent back to their original time and starting to attempt to do exactly that.
* In the ''Film/AvengersInfinityWar'' fic ''[[https://archiveofourown.org/works/21216794/chapters/50511512 Checkmate]]'', after Thanos has left Titan with the Time Stone, Tony suggests that they use a device he created back on Earth that can project an individual's consciousness back in time to essentially possess their past self; with this plan proposed, Peter Parker is chosen to be the one sent back, projecting himself back to 2015 (shortly after the events of [[Film/AvengersAgeOfUltron the Battle of Sokovia]]) to warn the Avengers of Thanos's ambitions.
* ''Fanfic/ACrownOfStars'': [[BigGood Daniel]] travels back and forward in time bringing Shinji and Asuka along with him to fix the mistakes of the past.
* ''Fanfic/DoingItRightThisTime'': As usual in ''Evangelion'' PeggySue stories, one of the primary goals of Shinji, Asuka and Rei is averting TheEndOfTheWorldAsWeKnowIt. Another goal is fixing the unholy mess that was their relationship and learning to get along better with each other (which will lead to unexpected results known as the [[OneTrueThreesome "Israfel Special"]]).
* ''Fanfic/TheElementOfTime'': After things epically head south in the final battle against the Juubi, Naruto is given the chance to travel back in time and fix everything by a powerful interdimensional warrior named Felix Yoshoryuu. With help from this warrior, plus multiple allies that later join the cause, he sets off to save as many people and foil as much evil as he can in his newly granted second chance. But unfortunately, with this time travel having inspired a powerful threat from the same interdimensional world as Felix to attempt his own devastating plans for the ninja world, it soon becomes clear that this new timeline will come with just as many dangers (if not more) as there were before.
* ''Fanfic/GogglesAndTheTears'', being a TimeTravel crossover, is set up as a final chance to defeat [[AIIsACrapshoot SHODAN]] before she uses [[VideoGame/BioshockInfinite Elizabeth]] to take over the multiverse. A majority of the story involves a trip to Columbia, and one chapter named after this trope involves Booker [=DeWitt=], Elizabeth, and a Vox Populi member detouring to Finkton to rescue Chen Lin before Jeremiah Fink [[spoiler: kills him again]]. By Booker distracting Fink in a firefight, Elizabeth manages to sneak Lin out to his gun shop. This allows the Vox to properly get their weapons, resulting in the Vox [[BigDamnHeroes allying themselves in the fight against]] SHODAN instead of trying to kill Booker. [[spoiler: It turns out that the chapter played out this way because of the G-Man, who had been fed up with the Luteces running Booker through the same scenario 122 times.]]
* Yet another ''Evangelion'' example comes in the form of ''Fanfic/GoingAnotherWay'', this time through [[spoiler:Rei Ayanami, [[MyGodWhatHaveIDone horrified at what the Third Impact truly wrought]], going back in time to change a few things around in order to prevent the disaster. The biggest change she made was influencing Gendo Ikari's thoughts subtly enough to make him leave Shinji in the care of Yui's brother so as to ensure Shinji would be less of an emotional wreck]]. Everyone gets occasional flashes to their previous lives in dreams meanwhile.
* In ''VideoGame/HetaOni'', [[spoiler:Italy has been rewinding time again and again so that everyone can get out of the HauntedHouse alive]].
* A very common goal of certain loopers in ''Fanfic/TheInfiniteLoops'' is to prevent something that went wrong in baseline.
* ''Fanfic/LeaveForMendeleiev'': "Race Against Time" features Timebreaker jumping back in time to try and prevent the destruction of her pocketwatch, while her timeline's iteration of Ladybug hitches a ride and [[MyFutureSelfAndMe warns her past/present self]] that [[spoiler:Nadja is about to arrive to pick up her order early, and Marinette needs to be there to avert a ForWantOfANail scenario]]. This also has the unintentional (but highly fortunate) side-effect of [[spoiler:throwing Adrien off Marinette's scent: he suspected she might be Ladybug, but seeing them together causes him to assume otherwise]].
* In the ''Series/{{Smallville}}'' fic ''Fanfic/NewBeginningsSmallville'', when Clark uses the Legion Ring to reset time to stop Linda Lake, Lois steps in and causes them both to be sent back to the time of the pilot episode (although Lois goes into a coma and initially assumes it was all a dream before she is sent to Smallville and meets Clark directly). With his new advance knowledge, Clark is able to easily defeat many of his early opponents and assemble the Fortress of Solitude ahead of schedule, as well as gather the Justice League into an official team a year or so in advance (as well as [[spoiler:save Kyla, Alicia, Tim and Wes to become heroes themselves]]).
* ''Fanfic/OnceMoreWithFeeling'': [[PhysicalGod Lilith]] misunderstands [[WoobieDestroyerOfWorlds Shinji]] when he says he wants to go back, and she sends him back in time. Shinji gets shocked but he decides that he will use that chance nevertheless to [[TheAtoner atone for everything that he did and did not]]]. He is so determined to win the Angel War, protect his surrogate family and make amends that his behaviour gets [[ParentalSubstitute Misato]] puzzled, since she does not understand why [[ChronicHeroSyndrome he goes out of his way to help everyone and make them happy]] (and he cannot tell her he feels [[SurvivorGuilt guilty]] [[MyGodWhatHaveIDone for leaving her, Asuka and Rei dying]] and [[ItsAllMyFault obliterating the whole humankind]]).
* {{Subverted}} in ''[[http://www.fanfiction.net/s/2149801/1/Out-of-Time Out of Time]]'' when a time traveling [[Manga/RurouniKenshin Kenshin]] considers trying to [[spoiler:save Tomoe]], but discards it when he considers how the timeline could be screwed up (and then finds out he's arrived at too late a time to change it anyway). Also subverted by [[spoiler:Saito]], who not only doesn't try to change the status quo despite the opportunity and motive, but risks his life attempting to keep it instead.
* In ''Fanfic/PokemonResetBloodlines'', Cyrus succeeds in learning how to manipulate reality and destroys the entire universe, erasing everything and everyone from existence. Arceus manages to save Ash before he disappears too, sending him back to the past [[PeggySue with his memories intact]] so he can prevent it from happening. However, the timeline is rewritten in the process, and many things end up changing, [[CloseEnoughTimeline creating an entirely different universe]].
* The ''Fanfic/PonyPOVSeries'':
** RecursiveFanfiction ''[[http://fav.me/d4lrntt Fading Futures]]'' has Twilight Tragedy manage to break free of Discord's control in the [[BadFuture Epilogue timeline]] and seek to change the past so that Discord never won in the first place. She manages to do so, but as a result, the timeline she inhabits no longer exists and everything in it are "reborn" into their main timeline counterparts. [[spoiler:Realizing this, she invokes her SuperpoweredEvilSide, Nightmare Purgatory, to take her revenge on Discord before the "rebirth" is complete. She realizes at the last moment she's dangerously close to becoming SheWhoFightsMonsters and manages to stop herself from finishing the job, preferring to [[DyingAsYourself fade away as Twilight Sparkle]] instead of becoming a monster, [[WhatYouAreInTheDark even if no one, not even her, will ever know]].]]
** The write eventually [[http://fav.me/d8rjexp did another story]] were [[spoiler:the Twilight from the final loop subtly alters things to create a universe were Eclipse never existed at all and Discord was defeated straight up.]]
** [[spoiler:Later in actual canon, its revealed Twilight failed because a ''previous'' Twilight ''didn't'' have a HeelRealization and became Nightmare Paradox, and undid the Set Right What Once Went Wrong to keep punishing Discord.]]
** It's revealed that [[spoiler:this is the goal of the Anti-Hooviet Rebels that Shining Armor meets in his arc. 25 years ago, the Shadow of Chernobull, a [[RealityWarper reality bending]] imagination monster was released from PandorasBox by the Hooviets. After [[SpaceTimeEater devouring countless existences and imaginations]], it becomes [[ParodySue General Admiral Makarov]], the BigBad of Shining's arc, who prevented the Hooviet Empire from collapsing when it was supposed to and ultimately attempting to warp the world to his own ends. The goal of the Rebels (and Shining Armor) is to lure the [[ClockRoaches Wolf]] to Makarov so it can [[RetGone erase him from existence]] and return everything to how it would have been had he not escaped. Shining ultimately successes in doing so, waking up in a world where the Hooviet Empire no longer exists and everything is more peaceful and good.]]
** This turns out to be [[spoiler:Amicitia's]] entire ''purpose'' as Spirit of Happy Endings. She travels to various [[DarkFic Grim Dark]] worlds and interferes to nudge an event in the right direction to do this trope. [[spoiler:This includes the various timelines that Nightmare Eclipse brought ruin to.]]
** [[spoiler:The ''main universe'' is this: Amicitia sacrificed herself to create Shining Armor, making a divergent timeline where Discord was beaten on the Day of Discord.]]
** [[spoiler:Discord and company's endgame involves RewritingReality [[MakeWrongWhatOnceWentRight to alter the world into having always been a chaotic hellhole]]. The CMC manage to ultimately restore everything, and Apple Bloom [[EndOfTheWorldSpecial gets to alter history however she sees fit]] while repairing the damage, and takes the opportunity to alter history to change things for the better. This includes giving the Tales 7 an overall happier end, with Starlight's death now being a HeroicSacrifice to save thousands of lives and Sweetheart gaining HealingHands from the FantasticNuke that destroyed their civilization, letting her save her sister from a grisly demise.]]
* This is the premise of ''Fanfic/{{Recoil}}''. A certain battle has GoneHorriblyWrong and Taylor is sent back in time to try and do better.
* {{Subverted}} in ''Manga/ReTake''. [[spoiler:Shinji of [[Anime/NeonGenesisEvangelion End of Evangelion]] wakes up in the past, just after the battle with Leliel. He tries to set right everything that went wrong to prevent the End of Evangelion. It turns out he's only making life better for an alternate version of himself, and there's nothing he can do to change that. He eventually accepts it, and returns to the CrapsackWorld future he belongs to. Though there is an implication of a HappyEnding for him, so it's all good.]]
* ''Fanfic/SpellboundLilafly'': Félix eventually learns that his father wants to use the Wish to [[spoiler:undo the creation of the fae (which also involved a Wish). It's implied that this would result in restoring the canon timeline]].
* In the ''Literature/ASongOfIceAndFire'' PeggySue fanfic ''Fanfic/RobbReturns'', this is the Old Gods' purpose in sending Robb back in time.
** This is a fairly common FandomSpecificPlot for ASOIAF fics, with the White Walkers succeeding in bringing the Long Night and destroying Westeros, and various characters being sent back through time through various means (the Old Gods, the Three Eyed Raven, etc) in order to try and avert this from happening.
** ''Fanfic/TheRavensPlan'' is probably the crowning example, however, as Bran and Melisandre carry out a ritual to send a group of core characters back in order to avert the War of the Five Kings and other conflicts which weakened Westeros before the Night King's assault. However, it ends up [[GoneHorriblyRight working too well]], with the spell being supercharged and causing hundreds (if not ''thousands'') of people beyond the intended ones remembering.
* ''Fanfic/RosarioVampireBrightestDarkness'': During the climax of Act III, Tsukune and his group all launch an attack on Kiria's facility to prevent him from using the Chrono Displacement spell to remake history [[InTheirOwnImage in his own image]]. Everything that can go wrong ''does'' go wrong, and everyone is killed in the ascent except Tsukune, who is himself mortally wounded by Kiria before Kiria himself is killed by Luna. Luna, having gone insane with grief as a result of Rason's death, is fully prepared to allow the world to be destroyed by the spell, which Kiria has succeeded in casting, but Tsukune manages to persuade her to instead change the date of the spell to one day in the past so he can go back and save everyone. With his knowledge of the future, Tsukune is able to ensure that everyone survives the attack.
* ''Fanfic/TheSecondTry'': After surviving on their own [[AfterTheEnd in the post-TI world]] Shinji and Asuka wake up one day and find they have traveled back in time. Shinji quickly thinks of looking for some way to prevent the [[EndOfTheWorldAsWeKnowIt end of the world]], but [[TheWoobie Asuka was too depressed to try at the beginning]], and he needed to convince her.
* ''Fanfic/StormOnTheHorizon'':
** On the ''VideoGame/LifeIsStrange'' side of the crossover, after becoming immortal and officially dead, Max used her powers to set Arcadia Bay right. She murdered [[spoiler:Mark Jefferson]] (and seemed to enjoy it, given that she rewound five or six times just so she could do it again), exposed Sean Prescott's financial crimes, and got Nathan and David into treatment programs. The butterfly effect also prevented the death of Chloe's father William as a pleasant side effect. As a result, both Rachel Amber and Chloe Price lived, with Chloe, instead of a rebellious punk whose life was falling apart, becoming an A student and even a member of the Vortex Club for a time. As an adult, she went on to marry a Hollywood lawyer [[spoiler:named Neil Sobeck and give birth to a daughter named Elisabet... whose work made Faro Automated Solutions into a MegaCorp and put it in a position where it could accidentally [[RobotWar destroy the world]]]]. [[UnwittingInstigatorOfDoom Oops.]]
** Max regularly uses her powers to "correct" herself. Aloy is initially quite disturbed, but gets used to it.
** On the ''VideoGame/HorizonZeroDawn'' side, meanwhile, Aloy uses her foreknowledge to pull a PeggySue. First, she prevents Olin and HADES from learning about her, which led to the massacre at the Proving and Rost's death in the original timeline, by having Max lead him away to drink and gamble. Without the Proving massacre, she instead gets made Seeker after winning the Proving and requesting, as her boon, to go into All-Mother Mountain in order to meet her mother, where the scanner recognizes her as Elisabet Sobeck just as it did in the original timeline. Without Olin spotting her and reporting her back to HADES, Aloy gets the jump on the Eclipse, [[spoiler:killing Helis at the Ring of Metal instead of much later at the Battle of Meridian]].
* ''Fanfic/ThousandShinji'': When [[spoiler:''[[TabletopGame/Warhammer40000 the Necrons]]'']] had all but [[spoiler:conquered the galaxy, the Warhammer 40000 gods]] decided that the only way to fight them was travelling to the far past and rewriting history.
* [[https://www.fanfiction.net/s/10316270/1/Too-Far "Too Far"]] has [[spoiler:Diamond Tiara accept a [[DealWithTheDevil deal with Discord]] to get a do over and avoid causing Dinky to be DrivenToSuicide by her bullying (which finally caused Diamond to realize her actions have consequences).]]
* In ''Fanfic/TwilightThenTwilightNowUniverse'' fanfic ''The Magnificent Six'', this is the villain's big plot, and it is used to divide the new Elements of Harmony: [[spoiler:Applejack, being the original [[WesternAnimation/MyLittlePonyFriendshipIsMagic Element of Honesty]], is swayed to join the villain and stop the {{Gotterdammerung}} that resulted in the current present. The other five, being native born to the present, find this insulting and horrifying and fight her to stop her going through with it. GreyAndGrayMorality is invoked because, as much as it's only natural the mortal elements would want to preserve their own existence, Applejack has an unquestionable point that the present is a ''[[CrapSackWorld nightmare]]'' compared to the [[SugarBowl Equestria when she was born]], and so one has to wonder if undoing the BadFuture (from Applejack's perspective) is really so wrong.]]
* An omake for ''Fanfic/WhiteDevilOfTheMoon'' had [[Franchise/SailorMoon Chibi-usa]] (Or rather, a [[Franchise/LyricalNanoha Nanohaesque]] version of Chibi-usa) travel back in time, believing she was doing this trope by making sure Nanoha never met Fate. Cue Vivio, who believes that by preventing Chibi-usa from doing that, ''she'' was doing this trope. [[spoiler:Vivio won.]]
* In ''[[https://www.fimfiction.net/story/302805/would-it-be-worth-it Would It Be Worth It]]'', during the Season 5 finale, Twilight decides to go back even further than [[MakeWrongWhatOnceWentRight Starlight did]] to stop Our Town from ever existing and thus negate her entire reason for her revenge plot. [[spoiler:Ultimately averted, as her own future self does this trope to warn her that [[ButterflyOfDoom doing so would end no different than Starlight's plans and bring about a]] BadFuture even worse than the ones Starlight made. [[NothingIsScarier Said future is never shown,]] but it's implied that her Spike ended up not making it back and that Starlight or Twilight herself is the villain the alteration would let take over.]]
* In ''Fanfic/BornOfTheSameImpulse'', Stephen uses the Time Stone to send both himself and Tony on a MentalTimeTravel to change history and save the universe from Thanos. They found themselves back in 2015, just as Tony and Bruce are set to create Ultron. Tony uses this opportunity to fix the mistakes he made during the events of ''Film/AvengersAgeOfUltron'' all the way to ''Film/CaptainAmericaCivilWar'', first by rewriting Ultron's code and repurposing him into Vision, and by confronting Steve about his parents' death, thus preventing the breaking of the Avengers.
* ''Fanfic/NewGirlMortimermcmirestinks'': The purpose of the ETC Lab experiments that created the new timeline was to prevent the hundreds of deaths brought on by the Hiss invasion. When Emily, Arish and Langston regroup and confirm the situation — that they are living in a wildly different timeline — they question if they should undo the newer timeline, Langston admitting that the canon timeline wasn't exactly pleasant.
* Descendants story ''Rewrite the Past'' has the Core Four plus Dizzy and a comatose Ben go back in time. A "purity of heart" requirement is the explanation Mal gives as to why Maleficent never used the spell they use for the jump. They end up landing on the Isle in five-year-old bodies (one in Dizzy's case)... while Jane and Lonnie (who had died in the previous future) also come back in five-year-old bodies and land at Auradon Prep. Jane leads Lonnie and Dude (in puppy form, which the two encounter along the way) to her place as it was closest. The first adult to know about the time travel is Lumiere, who had been with the group when they performed the spell. Notably, because the Core Four (plus Dizzy) are already at Auradon (Ben had refused to leave the Isle without them), Ben only announces three villain kids in his first official proclamation; he had entered expecting his parents to react the same way they did in canon, and even singled out Gil as the one to get the reaction Mal did in canon due to his parents' personal history with Gaston.
[[/folder]]

[[folder:Episode or Character Plots]]
* ''Fanfic/HeroChat'':
** Played for laughs with time-traveling hero Bunnyx. When things get [[GodzillaThreshold really bad]], she can go back in time and fix them. That means that when someone has a stupid idea and Bunnyx does nothing, they treat it as a sign that they're in the clear.
--->'''Bunnyx:''' If I don't come back in time to stop you, how bad an idea can it really be?
** Played more seriously in one short, where Chloe is having a really bad day, and then she notices that Alix has the tell-tale signs of having time-traveled. Alix admits that Chloe [[BrainwashedAndCrazy got Akumatized]], so Alix immediately jumped back in time to stop it--akumatized heroes are horrifying to deal with, so it was better to prevent it altogether. Alix promises Chloe that this was the first time she was akumatized in this timeline, after her redemption.
* In ''Fanfic/AMagicalEvening'' while it didn't exactly go wrong as the first timeline didn’t end badly. It did end with both couples being outed and Hildegard and Clio’s parents dying in an accident. Sofia, using her amulet, goes back to when she was a child to get a second chance in a new timeline to create a better outcome. She does this by stopping Cedric before Wormwood can discover Sofia and Lucinda’s relationship and also prevents him from discovering Hildehard and Clio’s and telling the council. Due to this, neither of them are outed and instead end up in a MarriageOfConvenience with only certain people knowing. Sofia also prevents Hildegard and Clio’s parents from dying in the accident.
* ''Fanfic/ThereWasOnceAnAvengerFromKrypton'': As we learn in Chapter 34 of ''The Girl Who Could Knock Out the Hulk'', [[spoiler: Doom and original Reed's goal is to defeat Thanos with minimal damage to Earth and humanity. When time travel failed, they started to explore the Multiverse and came up with their plan to get the Celestials to CosmicRetcon the universe to [[MergedReality add the various crossover elements]] in order to make the world stronger.]]
[[/folder]]

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