Alternate Realities Plot Generator
Generate alternate history and parallel world plots built on one clear point of divergence, with a character who has something to lose on either side of the split.
- Sample
The Weather Over Lakehurst
It is 1974, the Hindenburg never burned, and airships still carry passengers across the Atlantic. Radio operator Ruth Adair wants a transfer to the new Pacific route, far from her ex-husband's crew. Then a passenger dies in a locked cabin, and the airline asks her to log it as a heart attack. The dead man was carrying drawings for a jet engine that someone has paid fifty years to keep unbuilt.
- Sample
Every Third Night
After her mother's funeral, hospice nurse Carla Brandt finds that the hall closet in the old Duluth house opens, every third night, onto the same house in another version of things, one where her mother never died. Carla wants one honest conversation. That mother wants nothing to do with her, and that world's Carla, who never left Duluth and never forgave anyone, wants the door bricked up before her own mother finds out.
- Sample
Duplicate Entry
Dev Rao takes a temp job with the bureau that counts travelers between neighboring Earths. The work is dull until he counts himself twice. The other Dev has lived one world over for six years, has a better marriage and a better credit score, and has filed papers claiming that Dev is the copy. The hearing is on Friday, and only one of them gets to keep the name.
- Sample
The Temporal Merchant
In a world where time is a tangible commodity, a reckless trader illegally travels to different eras to profit, until he accidentally sells his own birth moment and starts fading away.
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Echoes of War
In an alternate universe, the outcome of World War II was dramatically different. Now, an underground group of rebels in this dystopian world must uncover forgotten history to restore reality.
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Mindscapes: Shattered Reality
Psychiatrist Olivia Reed discovers she can enter patients' realities that exist in their minds. When a patient whose reality is an apocalyptic future makes an alarming prediction, Olivia must stop it by navigating real and mental worlds.
- Sample
Reflections of Home
Renowned physicist creates a machine for interdimensional travel. Trapped in a peaceful, yet stagnant alternate Earth, he must muster the motivation to break the tranquility and return home.
- Sample
Reality Code
A teenage girl, believing her life to be a simulation, hacks into the 'main file', only to face sinister consequences as she alters her reality, testing the line between paranoia and unimaginable truth.
Alternate Realities: what makes the plot work
Alternate Realities stories transport characters to worlds and dimensions that differ from our own, often involving elements of science fiction or fantasy.
Choose one divergence and follow it
Alternate history works best when a single changed event spreads outward in ways a reader can trace. In The Man in the High Castle, Philip K. Dick lets the Axis win the Second World War, then shows the result in small things: what Americans collect, whose manners count, who defers to whom. Pick your divergence, list ten everyday consequences, and only then plot scenes.
Make the other life tempting
A parallel world is only dramatic if part of the hero wants to stay. Blake Crouch's Dark Matter drops physicist Jason Dessen into a version of his life where he chose his career over his family, and the pull of that road not taken drives the plot as hard as the danger does. Give the alternate world one thing your protagonist has always wanted.
Keep the crossing rules short
Readers accept almost any way of moving between worlds if it has a few firm limits that bite at the worst moment. In The Midnight Library, Matt Haig gives Nora Seed a library of lives she might have led and one simple condition that sends her back from each. Write your rules in three sentences or fewer, then build the climax on one of them.
Show a strange world through a familiar plot
Robert Harris sets Fatherland in a 1964 where Germany won the war, but the book runs as a police procedural: a Berlin detective, a dead party official, a case that leads where he shouldn't go. A murder, a heist or a love affair gives readers solid footing while the altered world fills in at the edges.
More Science Fiction & Fantasy plot generators
Or see the whole shelf: Science Fiction & Fantasy plot ideas.
Magic & Fantasy FictionGenerate fantasy plots where the magic has a price, the map matters, and the trouble is more interesting than a dark lord at the end of a long road.
Urban FantasyGenerate urban fantasy plots that put wizards, fae and things under the bridges into a real city, with a protagonist who still has rent to pay.
High Tech FictionGenerate near-future and cyberpunk plots where the technology is one step past today, somebody is making money from it, and the person in the way has a body…
Science FictionGenerate science fiction plots that start from one sharp question about science or society and follow it to the people who have to live with the answer.
Space & New HorizonsGenerate space plots about crews, voyages and first meetings, where distance costs time, the ship is a small society, and the far side is rarely what anyone hoped.
Role-Playing GamesGenerate plots for LitRPG and GameLit novels, or campaign hooks for your next tabletop session, where the rules of the game are part of the trouble.
Supernatural & ParanormalGenerate ghost stories, hauntings and paranormal investigations where the dead want something specific and the living have a reason not to give it.
Names, a first scene and a title
Questions about Alternate Realities plots
What's the difference between alternate history and a parallel world story?
Alternate history usually stays inside one changed timeline, and its characters often don't know any other version exists. Parallel world and multiverse stories involve crossing between versions, so the contrast between worlds becomes part of the plot. Many books blend the two, but deciding which one leads tells you whose point of view to use.
Do I have to explain how travel between worlds works?
Only as far as the plot needs. Readers care about consistent limits (who can cross, what it costs, what can't come back) far more than the physics. If the explanation runs longer than a page, move most of it into what characters do rather than what they say.
How much real history do I need to research for alternate history?
Enough to know what actually happened around your point of divergence, plus the names, technology and politics of that moment. Alternate history readers often know the period well and will catch errors in the real part. The changed part is yours, but it should grow logically from the real conditions you started with.
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