A thousand years ago, the Glorious Hero led a rebellion against the oppression of the Evil Emperor McDoom, rallying an army of downtrodden peasants, Storming the Castle of the dark empire, and defeating the emperor in hand-to-hand combat. His wise leadership ushered in a Golden Age of peace and prosperity that lasted for four generations, and he is remembered fondly to this day as the great founder and establisher of freedom in the land.
...huh? Wait a second, that's not right at all! See, this isn't just a backstory; his story was actually told in the previous series. He didn't raise the rebellion; he just got caught up in it, and the attack on the castle was just a diversion so he could catch the emperor alone and assassinate him with a dagger In the Back. (It was the most expedient way to get rid of the guy.) And no one called him "glorious hero" until many years later, when he had dedicated most of the rest of his life to cleaning up the mess left behind by the power vacuum he helped create.
You know this as the reader, but the characters 1000 years later don't. No one from back then is still around today. The language has changed, and ancient records have never been all that good at remaining intact, so certain facts tend to get distorted over time.
The Trope Namer is the introductory passage at the beginning of each The Wheel of Time book: The Wheel of Time turns, and Ages come and pass, leaving memories that become legend. Legend fades to myth, and even myth is long forgotten when the Age that gave it birth comes again.
This trope only covers instances where the audience is already familiar with the original picture, and then can see the mythology it gets turned into by later generations.
See And Man Grew Proud for when the legend of sorts was a catastrophe instead. Compare Future Imperfect, when it's the audience's era being misremembered like this. Not to be confused with Shrouded in Myth, which is when the mythologizing process happens while the subject of the myth is still alive.
- The origins of the Eastern Zodiac in Fruits Basket. Tohru's mother told her the legend of the Zodiac when she was little, which tells how the Rat tricked the Cat into missing the feast, which causes the Cat to be left out of the Zodiac. The Members of the Zodiac seem to believe this legend, as well, considering that it's one of the main reasons Yuki (the Rat) and Kyo (the Cat) hate each other's guts. However, the true story (which is revealed to the reader, but not the characters, toward the end of the series) turns out to be much different - most notably, the Cat was the closest one to God, until he asked Who Wants to Live Forever?, while the Rat just happened to be the first animal to be made immortal (after the Cat).
- Humanity in Diebuster barely has any records of the events that transpired during Gunbuster.
- They are aware that the black hole Exelio at the outskirts of the solar system was man-made in order to stop a Space Monster invasion (and indeed, it was created by the self-destruct of the battleship Exelion) but falsely believe it was also the event that took out the Space Monsters' main forces (that was the Black Hole Bomb AKA Buster Machine No. 3, an entirely different vehicle used in an entirely different location in an entirely different battle).
- They are also aware that humanity once possessed warp technology powered by degeneracy reactors but intentionally sealed the tech away to prevent drawing attention to themselves like they did with the Space Monsters.
- At the same time, they have no records left about any of the single-digit Buster Machines or their pilots and completely forgot about the Sol Absolute Defense System, a self-evolving fleet of unmanned Buster Machines defending the Solar System from threats - in fact, the whole conflict in Diebuster is caused by the emergence of the Topless causing the fleet to mistake humanity for Space Monsters and attack, leading to humanity looking at their decidedly not-of-this-world attackers and mistakenly thinking said attackers are the legendary Space Monsters.
- The whole thing is epitomized by Nono, a strange Robot Girl who constantly babbles on about a person called Nonoriri whom she really wants to meet for a reason she doesn't know. Then it is revealed that Nonoriri is Noriko Takaya, the protagonist of Gunbuster who went missing in action after detonating the Black Hole Bomb in a kamikaze attack. Nono is actually a miniaturized Buster Machine designed specifically to mount a search-and-rescue mission for the Gunbuster but ultimately ended up embedded into a long-period comet for several millenia.
- All this is justified by the revelation at the end of the series that Diebuster takes place 12,000 years into the future, just a year before Noriko and Kazumi finally return to Earth after their kamikaze run at the end of Gunbuster exposed them to massive Time Dilation. But despite the amount of time that had passed, humanity still remembers their saviors well enough to set up the most memorable scene of the franchise. Welcomə home, girls.
- Aquarion Evol: The events of Genesis of Aquarion are ancient legend by the time of the sequel (12,000 years later). We see that they've been made into a movie, which while surprisingly accurate in broad strokes, gets a lot of the details wrong. For one thing, Apollo's and Sylvia's love is played up enormously, whereas in the actual series they didn't realize and admit their love until near the very end... not to mention that the two are shown as a dashing gentleman and a beautiful feminine singer, but Apollo was really something of a Wild Child while Sylvia was a tomboy with a bit of a violent streak (and certainly not a singer). They even get their names wrong (Apollon and Silfy). Toma, the primary antagonist and someone who played a very big role in the climax, isn't even mentioned. When the characters view the actual events later in the series, they're rather shocked at the differences.
- Cardfight!! Vanguard G pulls this off within only three years. Chrono takes Morikawa on his word that he's the strongest fighter, who taught Kamui everything he knows, and is intimidated by him. He doesn't know that Morikawa is a boisterous idiot that can't balance a deck to save his life.
- After DC Comics' Crisis on Infinite Earths reboot, due to the fact that so much of the old "Earth-1" continuity was pivotal to the Legion of Super-Heroes canon, the pre-Crisis version of history was presented as the 30th century's distorted legends of the "actual" (post-Crisis) continuity. (For a while, at least. But then some RetCons were made, and a Continuity Snarl set in, so who knows if this is still the case in the current version of the Legion.)
- In one Fantastic Four arc they come across a town suffering from Decade Inside Second Outside; inside the town the FF are considered legendary heroes (even more so than in Earth-616 Real Life) and are quite upset when they find out about how the FF are really.
- A key part of Fractured and its sequel Origins is that the Star Wars Expanded Universe timeline happened...millions of years ago. Records are still lost, corrupted, or outright fabricated in that galaxy, so when the Flood shows up, everyone thinks they're just the Yuuzhan Vong again (having no clue what actual Yuuzhan Vong look like). The Force itself is subjected to this—now called the "Current" and very rare since the Eridians stripped it from the galaxy.
- The religious myth held by the apes in the first Planet of the Apes movie turns out to be a distorted version of Caesar's rebellion and the human war that allowed apes to come to power as depicted in the sequels.
- The prologue to The Lord of the Rings movies says this is why things came to be as they were at the end of the Third Age: people forgot about past threats, and grew complacent. Sauron exploited that. An unusual example in some ways, as some Elves who witnessed the events in question are still around thousands of years later, but most Men have grown estranged from and fearful of them, and thus don't know the facts.
- A comparatively modern example happens in The Rage: Carrie 2. Rachel mentions that a mountain of conspiracy theories has cropped up about "what really happened" during the events of the first film, sarcastically claiming that Carrie went up with Elvis Presley in a UFO. The only thing that everybody can agree on is that Carrie burned down her high school on prom night and then killed herself and her mother.
- By the time of The Force Awakens, the events of the previous movies have started to fade from mind. Luke Skywalker and the Jedi in particular are seen as legendary folk heroes who might not have existed, and many of the younger members of the cast (Rey especially) are awed to learn the stories were true.
- Discussed by King Arthur in Excalibur, explaining to Guinevere that he and his colleagues were not meant to live the lives of mortals, but have their exploits turned into legend.
- As noted above, The Wheel of Time. The series describes history as a circular repetition of seven Ages, and the story is set in the Third Age, which is both after and before our own time. One minstrel in the first book claims to tell tales of an ancient Age which are recognizable as distorted memories of the 20th century, and many of the events of the series bear a distinct resemblance to any number of what we know as ancient mythologies.
- Also happens in-universe every now and then, particularly with Birgitte, who's met half the heroes of the legends in person and probably been the other half.
- The Trope Namer comes from a line at the beginning of every book, but there's a short-term example of it at the end of most books too. Most of the novels end with a line about how rumors and legends spread about the important event at the climax of the book, and how they would be wrong and/or contradict each other about most details, but would usually get the most important detail right. Legend fading to myth within a year or so, in-universe.
- The Alloy of Law, by Brandon Sanderson, is set 300-odd years after the Mistborn trilogy. The events of the trilogy have taken on mythological and religious significance to the later generations. The most humorous of these changes is the ancient High Speech; when an example of it is given, it's quickly recognizable to readers as the silly-sounding thieves' cant used by Spook in the original trilogy, which nobody but he could really understand all that well. It hasn't gotten any more coherent.
- In Dragonsinger from the Dragonriders of Pern series, we are introduced to the legend of Moreta, the Dragonlady who saved Pern from a deadly epidemic at the cost of her own life. Moreta: Dragonlady of Pern (published at a later date) recounts the actual events that gave rise to the legend. The first book in the series is essentially about a legend (That dragonriders are needed to fight Thread) fading into myth, and everyone scrambling to respond when it turns out that the legends are true.
- Another backwards-example from Elizabeth Moon: Gird is considered to be either a saint or a god in The Deed of Paksenarrion, then the author went back and wrote the Legacy of Gird books to show what really happened.
- In Till We Have Faces Orual lives long enough to see her sister's life become the Eros And Psyche myth.
- In "The Sorrow of Odin the Goth" by Poul Anderson, a time traveler is actually responsible for events in a Gothic tribe that will later become mythologized in the Icelandic Völsunga saga ... events which are much more painful, human and error-filled at the time than later generations will realize.
- Septimus Heap:
- Five hundred years after Queen Etheldredda's death, her actual gain of immortality and trapping in the Palace attic have become a myth that is recounted in The Magykal Papers.
- The myth of the Black Fiend that lives in the Summerhouse of the Palace seems like a follow-up of Ullr's exploits 500 years earlier.
- Used several times in The Lord of the Rings: Even when elves are immortal and remember the distant past, they cannot be everywhere, so Gandalf only learns how to identify the One Ring by reading a scroll that is obscure even to the lore-masters, for their scripts and tongues have become dark to later men. A lot of legends are lost because they don’t have a translation to the common tongue, Celeborn claims that “Old wives keep in memory word of things than once were needful for the wise to know”, and it seems that only the hobbits, with their obsession for stories and relationships, wrote history books. The book even shows that The Lord of the Rings' story will eventually be forgotten and replaced by Myth:
The second disappearance of Mr.Bilbo Baggins was discussed in Hobbiton, and indeed all over the Shire, for a year and a day, and was remembered much longer than that. It became a fireside-story for young hobbits; and eventually Mad Baggins, who used to vanish with a bang and a flash and reappear with bags of jewels and gold, became a favorite character of legend and lived on long after all the true events were forgotten.
- At the start of A Canticle for Leibowitz, after the Simplification, humanity's knowledge of its own history has so far degraded that they think the Flame Deluge was caused by supernatural forces. It's ultimately inverted, though, in that after another several hundred years, they manage to piece together what really happened just in time for it to happen all over again.
- The Saga Of Recluce uses this a lot, as each book mentions a legend or a myth and the actual event is recounted in a separate book, often bearing little resemblance between the event and the legend/myth. Once such instance is the Legend itself.
- In Holes the main character says that he had a great-great-grandfather who had stolen a pig from a one-legged Gypsy, and she put a curse on him and all his descendants. The truth actually makes the ancestor, Elya, more sympathetic—he wanted to use the pig for a bride price, and in return, the Gypsy, Madame Zeroni (who actually was only missing a foot) told him he had to carry her up a mountain to drink from a special stream that would restore her strength. After realizing that the girl didn't love him, however, Elya impulsively got on a boat to America and only belatedly remembered his promise.
- A shorter term version of this happens to Harry Dresden of The Dresden Files. We, the readers, know that every time he comes out on top at the end of the book, it's by the skin of his teeth and the help of his friends and allies, he barely survives, and he usually has a hospital stay and not much else to show for it after all's said and done. Others, like members of the White Council, don't know all that, so they see him as this badass superwizard who rides zombie dinosaurs and takes down nigh-invincible enemies single-handedly. This leads to amusing situations like a group of combat veteran Wardens hesitating to arrest him when Harry, in fact, is concussed and can barely stand up straight. Though, upon reflection, knowing that Harry's past escapes and narrow victories all followed him being battered and on the verge of defeat before a mix of desperate innovation and outside intervention turned things around would probably make them even more nervous about seeming to have Harry at their mercy...
- The fifth series of Warrior Cats is a prequel to the series called Dawn of the Clans. In the first book, The Sun Trail, a she-cat named Rainswept Flower falls into a hole on the moor. After main character Gray Wing saves her, his friends Shattered Ice and Jackdaw's Cry figure out that they can get shelter by tunneling under the moor. Thus, tunneling is invented. The following release, Tallstar's Revenge, takes place in a more familiar time, which is many years after Dawn of the Clans. In it, a hilariously skewed version of tunneling's origin is told where Shattered Ice is some lone action hero who braves a blizzard to dig a hole which saves everyone from starvation. Since it was mentioned in Secrets of the Clans that stories of the dawn of the Clans are told differently every time, and we've seen several of these stories, it can be reasonably assumed that we'll learn how ridiculously twisted some of the other ones are as well.
- The Star Trek Expanded Universe novel Kahless involves a Klingon monk finding an ancient scroll dating back to the founding of the Klingon Empire that appears to have been written by Kahless himself after he left his throne to be alone. With the Empire in turmoil after the knowledge of the scroll is made public, Kahless II (the clone of the original) tries to find the truth and kill the lying monk, as his own memories contradict the scroll (then again, his memories are based on the official records). The scroll tells the story of Kahless in great detail. Kahless didn't rise up against the tyrant Molor because it was the right thing to do; he was Molor's faithful lieutenant until being forced into exile for killing Molor's son in a duel (which was fought because Molor's son was willing to murder poor farmers for not paying taxes because their crops failed through no fault of their own and could barely feed themselves). The character of Morath, whom myth remembers as Kahless's brother whom Kahless fought for 12 days and 12 nights for telling a lie, was actually a subordinate who Kahless eventually ended up thinking of as like a brother despite the lack of blood relation, who was the driving force behind the rebellion, pushing Kahless to stay the course after a twelve day battle of wills that started over a lie Kahless told, in which Morath convinced Kahless that the best way to make amends for the people killed by his lie (That he was leading a rebellion against Molor rather than just trying to survive) was to make the lie a reality. During the final battle, which Klingon myths depict as a titanic struggle between Kahless and the giant Molor, Kahless and Morath burst into Molor's throne chamber only to find a frail man suffering from a sickness normally only contracted by livestock. He tricks Kahless into giving him a dagger to fall on only to throw it at Kahless. Morath takes the dagger for his friend before Kahless kills the tyrant with his Cool Sword (which was made by a blacksmith out of steel, not Kahless from hair dipped in lava). If this is to be believed, than Kahless II is actually the clone of Morath, since the blood on the dagger was used as the genetic sample.
- China's Three Kingdoms period lasted from 184 AD to 280 AD. In the late 1300s, Luo Guanzhong wrote Romance of the Three Kingdoms, an obscenely popular book about it (possibly the second most popular book of time, behind only the Christian Bible) that was about 70% fact, 30% fiction. Due to the book's immense popularity, generation after generation assumed that the book was accurate; only in recent years have people started to learn about the book's inaccuracies.
- In Midnight Tides, the fifth book of the Malazan Book of the Fallen, the prologue shows how after the sundering of their home realms, the Tiste Edur and Tiste Andii invade the world in which the series is set, led by their respective leaders and good friends Scabandari Bloodeye and Silchas Ruin. Scabandari, whose forces are much higher in number than Silchas Ruin's, then betrays Silchas and has his followers slaughtered right there on the battlefield in order to eliminate any competition for his own people on this newly conquered world, then is himself killed by two Elder Gods for being such a treacherous little shit. Hundreds of thousands of years later, by the time of the book's main events, this tale has morphed into Silchas, now known as "the Betrayer", betraying Scabandari who then was maliciously hunted down and murdered by all of the Elder Gods and all the dragons and his soul stuffed into an eternal prison of unmeasurable agony. According to the descendants of his followers, anyway.
- An interesting example that may or may not be intentional, or simply part of the greater retcon that followed the series, occurs in Redwall. The account of the foundation of the Abbey and the arrival of Martin the Warrior told in the beginning of the first book (subject to Early Installment Weirdness) differs in quite a few details from the presumably true account of the events we read in the prequel Mossflower, although it does manage to at least get the cast of characters correct. The story told to Matthias implies that the Abbey already existed when Martin showed up, it was under siege at the time by their enemies' armies led by a wildcat, and that Martin came in the nick of time to rescue them. In fact, it didn't (it was built on the site of the battle), the reverse was closer to the truth, and Martin was involved in the battle from the start once he arrived from parts unknown to them.
- The existence of the White Walkers in Game of Thrones. According to the legends and myths, the White Walkers are ice zombies who nearly conquered Westeros thousands of years ago, until the men of the North drove them back and constructed the enormous Wall to keep them out. By the beginning of the series itself, the White Walkers are a myth that are either outright dismissed (which is done by Tywin Lannister) or their existence is believed in but it's still assumed they're gone (which is the position of the Stark family). Tyrion also mocks the notion of "snarks and grumpkins" beyond the Wall. Of course, this changes as strange things begin happening beyond the Wall...
- The existence of the Shadows in Babylon 5 is regarded as myths by most races. The Narn have it as part of the central religious book, and even among the Minbari who were space fairing then, the Shadows are dismissed by most.
- The backstory of the Cool Kids Table game Small Magic. The war between the Oni and Tenshi that sprang from the creation of humanity happens centuries ago, by the time the game begins most people believe it's just a story.
- Warhammer 40,000 is full of this.
- The Emperor was not a god, half his campaigning was in order to eliminate the concept of religion (and one of his children turned against him because he ordered him to stop worshipping him). These days, he's the central figure of humanity's state religion.
- Many of the more primitive worlds ascribe Space Marine landings as the God-Emperor sending his Angels of Death, sometimes the Marines looking for initiates are remembered as selecting the worthiest to live with them in paradise.
- The Salamanders appoint a "Forgefather" to look for the nine relics left to them by their primarch, Vulkan. The Tome of Fire, which periodically reveals the location of one of the relics, prophesied that Vulkan will return once all nine are found. In one of the Horus Heresy novels, which is a prequel to the 40k setting, Vulkan is sealed in a Stasis capsule. One that shares a name with the final relic listed in the tome...
- Done heartbreakingly in a novel where a set of toys are seen in a shop...which date back to and originated in the Soviet Union. When asked what the letters (CCCP) stand for, the shop's owner says "No one remembers anymore."
- Taken to an even greater degree by the resident elves, the Eldar. The Eldar's civilisation was annihilated in a cataclysmic event known as the Fall, and the only Eldar left in the galaxy are nomadic survivors, pirates, wanderers and a mysterious cult-like organisation dedicated to their trickster god Cegorach. Pretty much all of their vast history stretching back for millions of years has been lost, and what little remains is passed down through prophecy, allegory and song, which means their history becomes more fanciful through each retelling. Not even the Eldar themselves really know much about their history and culture, but it is suggested that a lot of it is based in fact. For example, the long lost "Talismans of Vaul" are actually gigantic space stations with anti-star god weapons. There's also the implication that their "gods" are actually the ancient Old Ones.
- Warhammer: Age of Sigmar sees this happening to Archaon the Everchosen, Lord of the End Times. In the original Warhammer Fantasy campaign, he was a devout Sigmarite templar until he fell to Chaos and eventually succeeded in destroying the Old World during the End Times. In the distant future where Age of Sigmar takes place, much of the knowledge from the previous world was lost and Archaon has been shrouded in mystery with his real backstory being just one of many, with other believing he was born in the exact moment as Sigmar himself, being a dark reflection created in the Realm of Chaos. There are even tales that Archaon is an immortal emperor who once ruled all of the realms before the arrival of Sigmar, who usurped what is rightfully his.
- Forgotten Realms has several, including the incident where elves imprisoned three fiends, but the warning became a legend, then a fairy tale, then Curse Escape Clause was fulfilled and three very pissed off nycaloths were released, so they assembled The Army of Darkness which eventually crushed Myth Drannor. For that matter, City of Song itself, despite being relatively recent, became semi-mythological, or at least unpleasant details tend to be left out — that keying selective spells to attack "allied" races being outlawed after some precedents, or that Cormanthyr ended up ruled by a council because Srinshee was exasperated enough to claim its throne by blade-rite only to give a public speech outlining her disgust over their behaviour and teleport away.
- Beast Wars: Uprising: While not in full effect in the main story, a hidden part of the last story has a character - with a shaky grasp of history at best - from some ten thousand years into the future call Optimus Prime "mythical" (and even gets his name wrong, calling him "Optimus Convoy").
- The Legend of Zelda:
- This trope is used to explain the apparent plot holes in the various games' backstories: most of the games take place hundreds or even thousands of years apart, and history has been muddled a bit since the actual events occurred.
- An interesting case comes up in The Wind Waker where the hero of Ocarina of Time is remembered with the proper epithet, but he's not called the "Hero Of Time" because he traveled through time,note but because he was worthy of claiming said epithet, which existed first, and was what allowed him to claim the Master Sword in the first place.
- Lampshaded in Skyward Sword. Gaepora is giving exposition via the legend that has been handed down through the ages in Skyloft, as instructions on what Link is supposed to do. Then Fi, who was actually around when the legend was written, comments that oral tradition is not a very efficient method of data preservation, and proceeds to recite the same legend, but far more detailed.
- In the backstory of Breath of the Wild, Calamity Ganon came to be considered a fairy tale villain in the 10,000 years since it was sealed away. Only when a fortune teller warns King Rhoam of Ganon's imminent return do the people of Hyrule start prepping for battle against the demon.
- This is present in the game Shining Force. The game opens with a tale of the defeat of Dark Dragon, who vowed to return in 1,000 years. The opening then states that after ten centuries of peace, Dark Dragon was "forgotten by all".
- The gods are perhaps a straighter example since they're really just regular people who developed highly advanced technology in ages past - most of which has been forgotten or lost even by their descendants.
- The final scene of Mass Effect 3 implies that this will ultimately happen to Shepard, since the scene shows a grandparent telling a child the story of "The Shepard." This is also used to explain the various differences caused by the player's choices through their individual playthrough.
- The start of episode one of Minecraft: Story Mode has the narrator talk about how this exactly happens. It's revealed that Ivor was a member of the Order, and Soren used a command block to erase the Ender Dragon from existance; Sealing their fate as legendary heroes. You can choose to reveal the truth to everyone at the end of episode four.
- In The Elder Scrolls V: Skyrim the events of Oblivion took place several centuries ago. Due to political upheavals and the Altmer falsely claiming credit for ending the Oblivion Crisis, the exact details of the Champion of Cyrodiil's actions have become confused. The true story is remembered and can be found in a book, but it's one account among many.
- Dark Souls II takes place long after the events of Dark Souls. The Chosen Undead's journey to determine the fate of the Age of Fire is nothing but a faded memory. This is reflected in the item descriptions for certain items that were in the first game. While some of the lore is consistent, many of the names of the major characters in the first game have been forgotten. Perhaps most humorously, Saint Elizabeth is described as being a woman of unsurpassed beauty... Elizabeth was actually a giant (intelligent) mushroom.
- The trope returns in Dark Souls III, as it has been several more ages since II. The Shield of Want, in particular, references the venerated King of Drangleic as a man of "all consuming thirst" instead of the noble but misguided soul he was.
- In Homeworld the Kushan have three legends on how they got to Kharak: the first version from kiith (clan) Gaalsien says they once lived in heaven but were exiled for one great sin and the gods will wipe them out if they try and leave, the version from the kiith (clan) Siidim says that only they came from heaven and the other kiithid are from Kharak and thus inferior, and the second Gaalsien version is that they were all created to suffer on Kharak from begin with and will be wiped out if they try and leave. The coming of the Taiidan when a hyperspace jump is successfully executed proves that the first Gaalsien version is the most accurate, with Homeworld 2 showing exactly what the sin was: using their possession of one of the Three Hyperspace Cores to bypass the Taiidan frontier forces and bomb their homeworld and then, when the galaxy decried their war crime, surrendering their fleet and Core to the Bentusi only to attack them by surprise when they came to claim them and discovering they were no match for them, at which point the remnants of the Taiidan fleets took the chance to pay them back and only let a few survivors establish themselves on Kharak when the entire galaxy begged them to stop, with a treaty giving them the right of finishing the job if they developed hyperspace technology again. This is also why the Gaalsiens are the antagonists of the prequel game Homeworld: Deserts of Kharak, as they're determined to keep the gods from wiping out their race, while the Northern Coalition is determined to survive (Kharak is slowly becoming uninhabitable) by developing space travel technology and discovering what the Anomaly is all about.
- 2000 years after the events of his own games, Marth is remembered in Fire Emblem Awakening as a fierce and unforgiving One-Man Army; Lucina is shocked when Tiki tells her that he was actually a kind and considerate idealist who cared deeply for his friends.
- Assassin's Creed: Fifty thousand years ago, a race of advanced humanoids lived on Earth, using technology far beyond modern tech. Then a solar flare struck the Earth, and Those Who Came Before died out, leaving only their technology and a few scattered memories, which mutated into mankind remembering them as gods. In Assassin's Creed IV: Black Flag, one of their number essentially says this trope word for word, while exploring the ruins of one of their works.
- RWBY: The Remnant fairytale, the Story of the Seasons, is based on truth as the Four Maidens really do exist, and they do indeed have the seasonal Elemental Powers that the fairytale claims. However, the story has taken on such mythic properties that the accuracy of the tale is hard to unravel. Pyrrha learns from Professor Ozpin that this is deliberate. People sought the incredible power of the Maidens for nefarious purposes, requiring the protectors of the Maidens, currently led by Ozpin, to hide them away and let them fade into legend and fairytale just to keep the Maidens safe. Professor Ozpin only reveals this to Pyrrha because he believes she is a good candidate to receive the Fall Maiden's powers from the current one, who is comatose as a result of a partially successful assassination attempt. The assassin, Cinder Fall, managed to obtain half the Fall Maiden's powers, and Ozpin hopes Pyrrha can inherit the other half to prevent the villain from obtain unimaginable power.
- Sluggy Freelance has the Gods of Mokhadun, who all withdraw from the mortal realm after a mortal/divine love affair ends up killing several of them, destroying Mokhadun, and nearly ending the world. The survivors slowly forget the truth of the gods as they fade into myth; some, such as the deceased and exiled, are forgotten altogether, while Father Time's name is lost, Dunnuloa, said in myth to now dwell in the moon, becomes Lunoa and then becomes Basphomy, Patron of Halloween (and is then forgotten as she gets replaced by The Pumpkin King), Krig Gaul the God of Joy becomes Kringle, Patron of Kristmas, and female Rana, said in myth to now dwell in the sun, becomes the male Egyptian sun god Ra.
- The events of Transformers: Generation 1 have faded into myth during the Beast Wars and Beast Machines era. When Starscream returned by possessing Waspinator, he fooled Megatron into believing that Starscream was a loyal Decepticon who fell in battle against Unicron. Blackarachnia knew enough history (Galvatron killed Starscream for betraying him) to call him out on his lie.