Science Fiction Story Ideas – Part 1: Aliens

Science Fiction Story Ideas


Alien Invasion – Aliens invade the earth…

  • But it’s the year 3,000 and our technology is far superior to theirs.
  • The aliens are alcoholics and are here to steal earth’s beer.
  • They land in the ocean and conquer the dolphins.
  • Aliens visit the earth, and the first person they encounter is a six-year-old girl. Due to a strange quirk of their culture, they decide that the girl is the rightful ruler of the world. After a brief war with earth’s armies, the girl is put into power.
  • The aliens are made of water vapor, and humans don’t know they’ve been invaded
  • The aliens are actually the government scaring people into obedience by faking an invasion
  • The alien ships are only an inch long. They are captured by small children like fireflies.
  • The aliens are made of chocolate and eaten by children.
  • The aliens take over, make people their pets, and nobody has to work again.
  • The aliens look like the Statue of Liberty; they see the Statue of Liberty and assume earth is already conquered.
  • Instead of killing humans, the aliens regress them mentally to infancy, re-raising them as part of their alien culture.
  • The aliens’ chief weapon, deadly to their species, does not have the same affect on humans – methane gas, water, bacon bombs, etc.
  • The aliens look an awful lot like the demons described in Revelation, and they say they were paid to attack earth by an entity called “God”.
  • Instead of using violence, the aliens focus on psychologically torturing earthlings.
  • The aliens look exactly like cell phones, and can imitate anyone’s voice
  • The aliens encounter a mentally ill homeless man who informs them that he owns the earth, and he is looking to sell.
  • The aliens have no weapons so, instead of outright war, they seed earth with the universe’s most deadly plant life.
  • The aliens have little in the way of weapons, so instead they take control of the earth’s telecommunications network in an attempt to make humanity too bored to fight back. Every radio, TV, computer, and cell phone broadcasts Mind-Numbing Entertainment 24 hours a day. Earth is left with nothing to watch but paint drying, grass growing, and aliens debating fiscal reform legislation.
  • The alien invaders easily defeat earth’s military forces. The aliens send a message to the President of the United States: “We are here for Larry Foote. Bring Larry to us, or we will destroy the earth.” The President’s response: “Who the hell is he?” Only Larry knows why an entire planet wants him dead.
  • The aliens want to conquer earth for what they consider its most valuable resource: Hollywood.
  • Variation – Aliens invade the earth, but are distracted from their mission when they are offered a movie deal.
  • The aliens look exactly like earth’s kittens, and the military is unable to kill any of them without losing popular support for the war. The adorable invaders struggle to have their threats of violence taken seriously.
  • Variation – The aliens look just like adorable five-year-olds, and their most dangerous weapon looks strangely like an earth lollypop.
  • The aliens destroy earth’s defenses, and then send alien foot soldiers to kill the survivors. The aliens evolved in dark caves and, thus, are completely blind. To avoid capture, the human survivors must be perfectly quiet.
  • The aliens don’t have any weapons, but they have billions and billions of lawyers.
  • When the earth is attacked by alien slave traders, one man has a plan to save the world: convince the aliens that humans would be worthless as slaves. (Because they’re too lazy, too dishonest, too violent, too sexually perverse…)
  • The aliens are sentient bushes, and they want to punish humanity for their cruelty to earth’s plant life: mowing lawns, pruning hedges, and plucking fruit from trees.
  • The aliens defeat the earth and begin breaking the planet into pieces. Each piece is teleported aboard a gigantic spaceship and flown away. Finally, only a tiny asteroid with a few hundred survivors is left. The earth’s last scientist announces that he has a plan to save what’s left of the world.
  • The aliens have little in the way of weapons, and they use their billions of soldiers as cannon fodder, attempting to defeat earth’s soldiers through sheer exhaustion.
  • Aliens contact the leaders of Earth and challenge them to a race to Alpha Centauri. If humanity wins, the aliens will give Earth the cure for all diseases. If humanity loses, the planet will be destroyed. Unfortunately, it’s 1969, and the aliens won’t take “no” for an answer.
  • Aliens head for Earth, intent on destroying humanity. To get there, they must travel through a long, starless section of the universe known as “blankspace.” By the time they pass through blankspace, they have completely lost their minds.
  • Aliens with psychic weapons are attacking the Earth. A scientist informs the President that he can make Earth’s soldiers immune to the attacks – by dramatically lowering their IQ’s.

They’re Already Here – A human is discovered to be an alien in disguise

  • He uses his alien powers to become earth’s greatest living magician.
  • He’s a crooked alien politician, banished for his failures on his own planet
  • Variation – he’s a failed alien messiah, hiding from his disillusioned followers
  • A shape-changing alien travels to earth to compete in beauty contests (with a very unfair advantage)
  • The alien left her planet because, on her world, blonde hair, large breasts and a small waist are considered hideous deformities
  • A man discovers his daughter is half-alien, his wife cheating on him with a Martian
  • He was forced to live on earth as part of an alien documentary TV show
  • He’s capturing children, shrinking them, and feeding them to his cat
  • He is actually a human disguised as an alien disguised as a human
  • After letting a stranger at a bar take her to bed, a woman becomes pregnant and has a beautiful baby girl. Nine months later, she begins to suspect that her baby’s father was not of this world, and she sets off in search of the alien bar fly.
  • An A-list movie star is discovered to be an alien, and his public relations team tries to “spin” the news.
  • A Baptist preacher is discovered to be an alien in disguise. The following Sunday, he has a new message for his congregation…
  • A woman’s car breaks down in the middle of nowhere. Unable to get it repaired, she decides to buy a used car at a strange-looking car lot. Days later, she discovers that the salesman was actually an alien in disguise, and the car contains advanced, otherworldly technology.
  • Males from the alien’s planet look strikingly like earth females.
  • His alien physiology makes him a superior athlete, but if anyone discovers he is not human, he will be thrown off his team and arrested.

Alien Abduction – Aliens abduct a human, and…

  • They take the human back to their planet for testing – they want to discover how much pleasure a human can endure before going insane
  • They give him to their kids, who play with him like a doll
  • The aliens attempt to torture him psychologically, but they know almost nothing about human psychology.
  • They turn him into a living bomb.
  • They offer him a deal: if he will help them conquer the earth, they will alter his body, making him the world’s greatest athlete.
  • The human is a serial killer, and brutally murders the aliens.
  • They force him to be part of their breeding program, but they think he’s a girl
  • The human is a cult leader, and he converts the aliens to his bizarre “religion.”
  • The man discovers that his wife sold him to the aliens, in exchange for her own spacecraft.
  • Aliens abduct humans in groups of six. The six are told that they will return five of them to earth if one will volunteer to stay.
  • The human introduces the aliens to an old human pastime: gambling
  • The aliens switch the human’s brain with that of his dog’s.
  • The human is mentally ill, and speaks only in gibberish. The aliens struggle to communicate with him.
  • After the aliens abduct a human, they are immediately abducted by larger, more advanced aliens.
  • The aliens disassemble the human, and place his brain and eyes in a jar. The human’s brain watches as the aliens try to put his body back the way it was.
  • A disabled man is abducted by aliens. The aliens have achieved near mortality through cybernetics. Their bodies have been replaced with metal and wires. Only their brains remain flesh and blood. The aliens offer the man a choice: He can stay as he is, damaged but human, or be given a healthy, mechanical body that looks more machine than man.
  • A computer programmer spends all day, every day, alone in his tiny apartment. He works from home and orders food online, almost never leaving his chair. One night, a fire forces him to leave the building. As soon as he steps outside, he is abducted by aliens. The aliens take him to their zoo, where he will be held captive in an exact duplicate of his apartment. For the first time in his life, he misses the outside world.
  • Aliens abduct a woman, explaining that they are researchers looking for the cure to baldness. They perform some experiments on her and return her to earth. The woman goes home, wondering if anyone will believe her story. She goes to sleep and, the next morning, her hair has grown by twenty feet. Amazed, she realizes she can actually see her hair growing. Cutting it just makes it grow back faster and thicker.

Friendly aliens – Benevolent aliens visit the earth…

  • The aliens are from a water-covered planet, and when they see a toilet, they assume it’s a weapon
  • The aliens are missionaries for a bizarre alien religion, and earth’s scientists and political figures struggle to not make fun of them
  • And society is baffled by the first alien / human marriage
  • People go to special clubs to secretly, illegally have sex with aliens
  • Aliens think something besides humans is in charge (dogs, computers, cars, parking meters, etc).
  • They are hunted by the AAA (Annihilate Aliens Already), a redneck hate group
  • The aliens were forced to leave their own planet because of their bizarre sexual practices.
  • Friendly aliens visit the earth and attempt to join a fraternity. (Or sorority.) After the aliens go through “initiation,” they have their own hazing rituals to show the humans.
  • The government orders everyone to be nice to the alien visitors, or they’ll be arrested. Unfortunately, the aliens are the most stupidly annoying creatures in the universe. (Even worse than humans!)
  • The aliens see how well humans treat their pets, and try to get in on the deal.
  • The aliens land at a daycare center, and the frightened adults hide in the basement. The aliens have lots of questions about life on earth, but the only humans they have to ask are five years old.
  • An alien posing as God visits a human and tells him that he has been chosen to write the new Bible.
  • A man is visited by aliens who give him the ability to heal people with a touch. After helping hundreds of people, he is horrified to discover that his gift is actually a weapon.
  • Every time he heals a human, one of the aliens’ enemies is drained of lifeforce and dies.

First contact – A spaceship crashes on the earth…

  • The religious aliens don’t realize that they have crashed on a planet. Instead, they are convinced that they died and are in their version of heaven (which, strangely, looks a lot like Cleveland.)
  • The aliens disguise their spaceship as a piece of modern art and hide it in the sculpture garden of a local museum.
  • The ship is filled with frozen humans who were abducted decades ago.
  • The alien pilot was drunk on Martian liquor, which he teaches a human to make.
  • Lands in a farmer’s field; he turns it into a roadside attraction for tourists
  • It’s discovered by cavemen, who use it to fight dinosaurs.
  • A man working on an oil rig in Alaska discovers a spaceship that had crashed in the water months ago. Oddly, the ship is empty. He begins to wonder if one of his coworkers is really the ship’s alien pilot. The more he investigates, the more his paranoia grows.
  • A child finds the spaceship in the woods behind her house. The aliens are nowhere to be seen. The child decides to turn the ship into her playhouse.
  • Variation – A child discovers the spaceship in the woods behind her house. The aliens are dead, but their pet survived.
  • The aliens look exactly like human infants, and they have trouble convincing humans they’re not.
  • The aliens are perverts, but their culture is so different that the humans don’t realize it.
  • The huge, hairy aliens leave the wreckage and wander into the woods, sparking the legend of Bigfoot.
  • The alien ship crashes on Capitol Hill, destroying the government. Americans wonder if they should be upset…
  • The aliens crash-land on earth in the early nineteen seventies. It will take months to complete the repairs to their ship so, to avoid drawing the attention of earth’s authorities, they disguise their ship as a disco.

What’s This Button Do? – Alien Machines / Artifacts

  • A homeless man discovers an alien vending machine, and uses it to buy a jet pack, a ray gun, and other futuristic technology. At the end of the month, the aliens come to collect the bill…
  • Amateur spelunkers exploring a series of caves discover a collection of ancient, alien religious texts. At first, they laugh at the aliens’ strange beliefs. But the writings contain predictions of events on earth, beginning with them being discovered by a group of amateur spelunkers…
  • Aliens visit an unlucky musician and give him an otherworldly instrument. Its haunting music can enrapture a crowd or drive them insane.
  • After a woman discovers tiny “crop circles” in her shag carpeting, she begins to suspect that her home is being visited by teeny, tiny aliens.
  • Aliens visiting earth accidentally leave behind an Entertainment Sphere, a device capable of projecting movies directly into the user’s brain. A teenager discovers the Sphere but, unfortunately, can’t figure out how to turn it off.
  • The Air Force discovers a wrecked alien spacecraft floating adrift near the moons of Jupiter. The pilots are long dead, but the ship’s cargo hold is filled with life, what appears to be a shipment to an alien pet store.
  • Aliens visit the earth to test a kind of “bug zapper.” The machine uses lights and sounds to entice humans into touching it. Anyone who does is instantly disintegrated.
  • A group of women at a nightclub discovers an alien sex toy. When the rightful owner returns, the women must make a decision: hand over the toy, or risk earth being invaded by alien sex fiends.
  • A child discovers her parents are actually androids. She is living in an alien zoo, and being raised by robot “parents” until she is old enough to be released back into the “wild” – earth.
  • Archeologists investigating the history of an alien planet discover fossilized aliens. Strangely, it appears that the extinct aliens looked a lot like humanity’s idea of angels.
  • As construction workers dig the foundation of a new skyscraper, they accidentally activate an alien machine: the Brain Drain, a device designed to keep any planet from having life intelligent enough to become a threat. As humans become dumber and dumber, they try to find a way to destroy it and save the world.
  • A group of archeologists discovers a hidden pyramid in South America. Inside, they find a stone tablet documenting a visit from aliens thousands of years ago. The aliens collected DNA from every species on earth, just in case any went extinct. Somewhere in the pyramid is the key to restoring all of the species that had ever been lost.
  • A young priest discovers that the Vatican has been hiding the Life Source, a device that was used by aliens to create humanity.
  • A man purchases a new satellite dish, and tinkers with it to make it more powerful. He goes inside and discovers a host of new channels. One of the channels, strangely enough, shows his own life. After some research, he finds that the signal is coming from the Crab Nebula.
  • A team of astronauts traveling to Mars discover that they are being monitored. Thousands of years ago, an alien race decided that humans weren’t dangerous, as long as they couldn’t reach other planets. But, if humanity ever did, they wanted an advance warning.
  • Newlyweds in Albuquerque, New Mexico decide to honeymoon in the tiny town of Roswell. Their hotel is an unusual place, run by tiny men with large, bald heads. The newlyweds discover that the television in their hotel room can transform viewers into whatever is on the screen, but only until the program is over.
  • Astronauts discover blueprints for an alien machine called “The Joy Box.” According to the blueprints, the device has the ability to make anyone blissfully happy. However, the aliens have very different ideas about what “happiness” really is.

33 Responses to “Science Fiction Story Ideas – Part 1: Aliens”

  1. thank you for that now i have lots of ideas so i won’t be suck with my english

  2. This is a very helpful site! Thank you very much!
    Could you add more ideas about steam punk theme and paradox, please?

  3. GREAT ideas!!! I like the one about the Angels but i might change it a bit

  4. Haha- great. This helped a lot.

  5. awesome i like the ideas can you add more about robots.

  6. O_O i am amazed i wont fail english! THANK YOU SOOOO MUCH

  7. Your story ideas are so great! Where do you come up with them all? And I loved “They Ate the Waitress?” I’m really surprised that it never got published. I’m sure that if you tried publishing it in a digital format ( has some options, I believe) things might work out better. Good luck, and thanks so much for the writing ideas :)

  8. Thanks, Elizabeth! My ideas come from a variety of sources. Sometimes I’ll read a story by someone else, and a particular element or theme will stand out, and I’ll run with it. “War of the Worlds was great, but surely the army would have destroyed at least one of the Martian tripods. And they could have recovered a few pieces, and reverse engineered the technology, and built their own death rays…” And there’s a whole new story.

    Sometimes I’ll see a piece of visual art that inspires me. I’m a big fan of surrealist art. If you spend some time with a painting, what started out as an amorphous blob might start to look like an alien monster. Or a painting of a couple in a cafe might make me wonder what they’re talking about, and I’ll start writing a conversation.

    Basically, ideas are all around me. The problem is just finding the time and energy to use them all!

  9. Amazing! There are so many good ones I cannot even choose which one! But I think I will choose that new skyscaper one or that “The Joy Box” one! Thanks a lot and ton and 500 kg ….. Just just just Thanks INFINITY!!!!!!

  10. 😀

  11. this is very helpful site & great ideas..thank u very much…

  12. How about the aliens invade, but the story is written from their perspective and they eliminate humans and eventually conquer Earth?

  13. why don’t you have an app for this?

  14. This is really good. I have written a major story about the Aliens. Thank you.

  15. Here’s another idea for you:
    an old man craves to be young again, and so when he wins the lottery he gets himself so fixed up to the point of himself becoming completely reset. He runs into some actually young friends of his (8 and 10) and it turns out he’s an 11 year old boy now.

  16. really nice good help thanks

  17. WOW! What a sea of ideas! Actually….I was searching for one line ideas for my novel and i think I just got’em!

  18. Amazing! Fab!
    I got an excellent help for my project.

  19. These are all awesome story ideas…-thanks for setting this website up- Props for the story idea about the lady who’s car breaks down out in the desert at night and she buys a used car from the alien used car lot- awesome….definitely a Rod Serling “Twilight Zone” type storyline going on there, would make a cool story…

  20. earth starts to get alien tv shows from 40 light years away and its good really good.everyone watches it and we stop making our own. 40 years later on their news we hear them outraged at recieving our crap tv and are sending an armada to wipe us out. we do the sums and work out the armarda will be here in a fortnight

  21. This story line was actually a story I’m trying to find. Young boy lives with his Mother and Grandparents in a boarding house. Man comes looking for a room. Boy notices something creepy about him. Looks at him through stained glass. Sees that man is not human. Grandfather notices that his collection of silver dimes is missing. Asks grandson where dimes are. Grandson takes him up to room. Creepy man is gutted and stitched back up. Weird-shaped organs are displayed. Boy says he put silver dimes in creepy guy to kill him, ’cause that how you kill a monster. Do you know this story, or author? Please help.

  22. I’m afraid I don’t know that story. Sorry.

  23. can you add more ideas if possibe please?

  24. That’s something I’m working on. :)

  25. Can I use the story about how the aliens are alcoholics and try to get earth’s beer and how a couple’s son gets bitten by a werewolf? I use wattpad and I really need story ideas!

  26. You sure can!

  27. amazing! helped in stories

  28. wickedly awesome website i combined heaps of these ideas with my own a and got an A for English!!!!

  29. Great! Glad to hear it!

  30. Thank’s for these ideas! I’ve been struggling of story ideas for months! Thank you 😀

  31. Hi, if I use your prompts to write a story and then publish it online and get paid, is that okay? Would you like me to credit you for the story idea?

  32. Hi! You are welcome to use anything from the story ideas section, no credit necessary. Enjoy!

  33. Thank you. I’ve come back to these pages multiple times just to get the brain going. Even little bits of each idea help to get something solid going. Thanks again.

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