Most people meet these gods through a screen, and there is nothing wrong with that. A film that sends a million people looking up the Norse cosmos has done more for the field than any monograph. The trouble is not that adaptations change things — adaptation is change, that is the definition — but that the changed version becomes the default, invisibly, until a reader is astonished to learn that the hammer in the museum case has nothing to do with worthiness.
So this is a ledger, not a complaint. Below are the specific inventions that have overtaken their originals, with what the sources actually say beside each, and some credit where adaptations have quietly got things right that the popular imagination still has wrong.
Why adaptations change what they change
The alterations are not arbitrary and they are not usually ignorance. Four pressures produce nearly all of them.
Serial continuity. A film franchise needs recurring characters with stable relationships. Myth does not: the same figure can be a father in one poem, an enemy in another, and absent for a century. Family relationships get fixed and simplified because a sequel needs someone to betray somebody.
Moral legibility. Modern mass storytelling wants an antagonist whose defeat is satisfying. Most ancient divine figures are not antagonists in that sense — they are forces with jurisdictions, and the underworld god is a civil servant rather than a devil.
Runtime. Myth cycles are enormous and repetitive. A two-hour film compresses three generations into one and gives the resulting composite a single motive.
Design. Visual media must decide what things look like. Sources very often decline to say, and the gap is filled by whoever draws it first — after which the drawing becomes the fact.
The Marvel ledger, item by item
The comics began in 1962 and the films built on sixty years of comics, not on the Edda, which is worth remembering before every argument on this subject.
- Loki is Thor's brother. In the Old Norse material he is nothing of the kind. He is Odin's sworn blood-brother — a formal bond invoked in a poem where he uses it to force his way into a feast — and his parents are giants. Making him Thor's adopted sibling gives the films their best relationship and severs the actual one.
- Laufey is a frost-giant king. Laufey is Loki's mother in the sources, and he is regularly called by her name rather than his father's, which is unusual enough that it has generated a small literature of its own.
- Thor is blond. He is emphatically red-bearded in the sources. Fair-haired Thor is a nineteenth-century painterly convention that the comics inherited.
- Only the worthy may lift Mjölnir. A pure comics invention, and a superb one. In the sources the hammer's peculiarity is a manufacturing defect — the handle came out short because Loki, in insect form, sabotaged the dwarves who were making it — and Thor needs iron gloves and a strength-belt to use it properly. Nothing about moral fitness.
- Hela is Odin's daughter. Hel is Loki's daughter in the sources, assigned her realm rather than conquering anything. The 2017 film's version is a different character with the same job title.
- Asgard is a golden city in space, reached by a rainbow bridge. The bridge is genuine and the burning of the world at the end is genuine. The astronomy is not.
Two things Marvel got righter than its critics allow: Loki's fluidity of gender and form is thoroughly source-attested — he gives birth to Sleipnir as a mare — and the sheer, exhausting frequency of Thor being sent to fix something by hitting it is a fair summary of the poems.
Disney's Hades and the invention of a Greek devil
The 1997 animated feature is a delightful film and its central theological claim is the most damaging single distortion in popular Greek myth. Its underworld god is a scheming, flame-headed usurper who wants the throne.
The Greek Hades does not want the throne, does not tempt anyone, and receives essentially no cult of malice — he holds a third of the cosmos by lot, and his defining characteristic in the sources is inflexibility rather than evil. Greek anxiety about him is closer to how one might feel about a legal system than about a demon. The film also has Hera as the hero's loving mother, which reverses the entire logic of the Heracles cycle: she is his persecutor, and the labours exist because of her.
Curiously, the video game that most people now associate with the same god is far more accurate. The 2020 roguelike gives its underworld a bureaucracy, a stern administrator running it, and a protagonist named Zagreus, who is a genuine if obscure figure from Orphic material — and the game knows perfectly well that it is picking a minority variant of his parentage rather than inventing one. That is what an informed adaptation looks like.
God of War, and the strange case of a real minor god
Kratos is an invented character, but the name is not. In Hesiod's genealogy, Kratos is the personification of Strength, a child of Styx who attends Zeus, and in the tragedy about Prometheus it is Kratos who arrives to supervise the chaining. The games' hero is unrelated to that figure in story, which makes the naming a very good joke that almost nobody gets.
The Norse-set games, meanwhile, contain a striking amount of correctly handled material. Baldur's invulnerability with a single overlooked exception is straight from the source. Mimir's severed head as a talking advisor is source-accurate and much older than the game. The 2022 Thor's heavy build and red beard are closer to the poems than any blockbuster's. What is invented is the whole plot architecture — the family relationships, the identity given to Atreus, the sequencing of the end of the world — and the games do not pretend otherwise.
Percy Jackson, which is doing something different on purpose
The children's series is frequently blamed for things it is not doing. Its core premise — a mortal-born child of an Olympian, tested, claimed, and sent on a quest — is one of the most authentically Greek things in modern fiction; the hero cycles run on exactly that.
Its inventions are structural and openly signalled: a summer camp, a modern relocation of the divine seat westward with the centre of power, and personalities updated for comic effect. The genuinely misleading residue is subtler than the big changes. Readers arrive believing the Olympian roster was fixed and tidy, that each god had exactly one portfolio, and that Ares was universally despised — the last a specifically Athenian literary attitude rather than a Greek one, as Rome's very different treatment of the same god demonstrates. The comparison of Ares and Mars is the fastest way to see how local that judgement was.
The smaller myths that will not die
- The Kraken belongs to Perseus. It does not. It is a Norwegian sea monster from Scandinavian sailors' accounts, imported wholesale into a 1981 Greek film. The creature sent against Andromeda in the sources is a sea beast of the Aegean kind — the Perseus and Medusa story has no Kraken in it.
- Egyptian priests were cursed mummies. The high priest whose name a famous film franchise borrowed was a real architect and physician, later worshipped as a god of healing; the curse plot is Edwardian pulp fiction with an archaeology-scandal chaser. See Imhotep.
- Vikings wore horned helmets. Nineteenth-century opera costume design. There is no archaeological support for it in the Viking Age at all.
- Medusa turns people to stone by looking at them. True, and worth saying, because in a list like this readers begin to assume everything famous is invented. Plenty of it is not.
What to do with a favourite adaptation
Keep it. Then read the sources next to it — not to catch it out, but because the divergences are where both the adaptation's intentions and the culture's assumptions become visible. Why does a modern studio need the death god to be evil? Why did a 1962 comic need a brother? Those questions are more interesting than a list of errors, and the answers say a good deal about us.
If a particular film or game sent you here, the comparison pages are built for exactly this kind of checking, and each individual figure's page keeps its modern reception in a clearly separate section from its ancient evidence, so that the two never blur.
What people ask after an adaptation sends them looking
Did any ancient audience treat their myths as canon in the way a franchise does?
No, and the mismatch is the source of most confusion. Competing versions coexisted without anyone needing to declare one official, and dramatists were free to alter received stories substantially — a tragedy could give a well-known myth a new ending and the audience judged it as art, not as a continuity violation. The idea of a single authoritative version is a much later habit, reinforced by print and now by franchise management.
Are any modern adaptations used by scholars?
Not as evidence about antiquity, but reception studies is a serious field, and adaptations are primary sources for the era that made them. What a decade does to Medusa or to the underworld tells you about that decade, reliably.
Is there an adaptation that changed how specialists read a myth?
Rarely the adaptation itself, but the audience it creates can shift research priorities: sustained popular interest in Norse material has helped fund translations, editions and excavations that would otherwise struggle for support. Influence runs in both directions, just not on the same timescale.
Which figure is most distorted overall?
Not Thor or Loki, whose distortions at least get argued about. It is Hades, who has been assigned a role — cosmic adversary, tempter, ruler of a place of punishment for the wicked — that his own culture never gave him, and the misconception is so thoroughly established that the accurate version now sounds like a revision.