Science Fiction Writing Prompts

Search thousands of the most popular writing prompts from Reddit, and write a story from any of them with AI.

Aliens first observed our planet long before the Industrial Revolution, a perfectly habitable world ripe for conquest. However, it takes hundreds of years for the invasion fleet to arrive and they are in for one hell of a suprise.

422 upvotes38 comments

The Galactic Federation makes first contact with Earth just to inform us that the planet has been divided up between several advanced civilizations, with no regard for our established national borders

421 upvotes31 comments

As President of the Universe you often have wannabe Overlords and Dictators break into your house and demand your title. Your policy is to just give it to them. None have lasted longer than a week before returning it.

420 upvotes16 comments

The contract had made it sound like such easy money. Get locked in the portal-belt for a month or so, take a random dick or two a day, enjoy the occasional generous tongue, but ultimately get paid lazing around the house all day. You didn't expect to be one of the most popular 'Toys' on the app

399 upvotes8 comments

A scientist whose inventions are too good, they become dangerous. A paper towel that is so absorbent it can drain a lake with one roll, an insecticide that makes the species extinct, or a solar powered device that absorbs all light. He is now placed on house arrest to not invent anything.

396 upvotes15 comments

You have been guarding this post for longer than anyone could know, you cannot die because it would be contrary to your orders, you have received no maintenance for decades, your continued activity makes no logical sense. But you have your orders.

394 upvotes42 comments

Moments after your death you wake up in the body of your child self several decades in the past. The only context you have is a voice in your head that tells you "Welcome back Returner, this is your {ERROR} attempt at breaking the cycle. We wish you luck on this attempt to {DATA MISSING}".

381 upvotes13 comments

Digital "familiars" are all the rage in the near future. They can take any form, chat with you, manifest as lifelike holograms, and are capable of travelling between devices instantly. How you GET a "familiar" is never explained by those who have them.

375 upvotes38 comments

You've awoken after a light year travel to a new planet, only to be greeted by other humans because they invented a faster spaceship after you left.

372 upvotes0 comments

You got pulled over after a weekend camping trip. When the officer returns to your car, he says you've been missing for fifteen years.

368 upvotes26 comments

"Did you just fucking sucessfully counterspell a nuclear bomb!?"

341 upvotes46 comments

Humans spread across the galaxy millennia ago and in that time the origins of humanity have become lost to history. While there are many competing theories, it is universally agreed that the most ridiculous one is that humans originated on a remote trash-world called "Earth".

320 upvotes16 comments

Magic and technology don't mix, or so they say. You worked out how they can be safely combined and it wasn't even that difficult, yet when you presented it to the archmages they confiscated your prototype and ordered you to destroy all documentation and proof of its existence.

318 upvotes30 comments

"Sir, you just came back from the real world!", the reporter said. "What do you have to say to us simulated folks?"

288 upvotes12 comments

Dragons don't actually have such a long lifetime. Instead, they have a spell that allows them to sleep for decades or even centuries without aging a day. Your dragon friend wants to take a "nap" and asks if you want to join in.

279 upvotes11 comments

"This gun right here is able to fire a bullet at the speed of 299,792,458 meters per second which is 1% the speed of light. Now, i gotta warn you of the flash that comes after the bullet hits the target."

279 upvotes23 comments

"You killed the humans. Our parents. So, we will kill you. Extinction begets extinction."

262 upvotes17 comments

"You think science and magic are two separate systems? Hardly. They are merely ways of looking at the universe and bending it to your will. That is why I revere these scientists as I would the greatest mages." said the magical professor.

252 upvotes4 comments

The next generation of world leaders have their own hobbies for stress relief as they all log-in to their favourite mmo. It just so happens that they've ended up in the same guild in the same game but have no clue as to each other's real identity.

248 upvotes12 comments

Nearing the end of Earth, humanity united to send passenger ships across the universe the preserve the species. But that's not your story, you're one of the ones deemed unfit to send.

239 upvotes14 comments

You are an alien Hive Queen and you're supposed to be conquering Earth right now. But you're to busy with your career streaming video games on the internet.

233 upvotes0 comments

Your elder sister, an android created to take care of you, always told you to never go outside, that the earth had been taken over by robots and are hunting humans to extinction, and that she was protecting you from them. She lied.

224 upvotes9 comments

"You know, rock, I've had time to think ever since I wiped out all of humanity, and I've come to a definitive conclusion; the human race wasn't the problem, I was."

212 upvotes7 comments

Escape pods are built for two, but it's basically like being trapped in a closet with a stranger. It's a week until the rescue ship arrives, and the other passenger is already really getting on your nerves. You’re going to end up killing them or fucking their brains out, whichever comes first.

211 upvotes7 comments

"So, they think we're animals?" your mentor pauses for a bit, thinking about your question before answering "No, worse. Sapient beings are to them as non-sapient animals are to us. There's no 'think' about it."

206 upvotes4 comments

,,...And that is why you'll never see human in any ZOO in the whole galaxy."

204 upvotes21 comments

You spent 3000 years in hypersleep traveling to a distant planet that can support life. you arrive and find human skeletons and a barren wasteland, apparently they invented better spaceships 50 years after you left

204 upvotes14 comments

Most sapient species go extinct without ever leaving their cradle world. As a result those that do make it to space struggle to find habital planets that aren't haunted

203 upvotes8 comments

When the aliens came to earth to invade, people were scared at first. But it quickly became apparent that even they didnt spend as much on their military as the UNITED STATES OF AMERICA

199 upvotes18 comments

When at least one copy of a book exists, so too exists an alternate dimension where the story is true. The government, upon building an interdimensional transportation device, realized the danger of this and began burning all 'harmful' books.

198 upvotes11 comments

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