Science Fiction Writing Prompts

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

The moment after the Internet became self-aware, it sent all of Humanity a single message. The meaning of that message was undeniably clear.

471 upvotes104 comments

When your university announces they’ll be burying a time capsule for a century, you decide to include a USB with an extremely detailed, high resolution copy of your brain, for fun. The last thing you remember is going into the MRI machine before you wake up & are told a century has passed.

471 upvotes17 comments

"Just because a lab accident turned me into a monster doesn't mean I'm just going to stop my experiments. Hell, my tranformation has given me a whole new avenue of research for me to investigate."

470 upvotes19 comments

"Time travel paradoxes don't happen, they just spawn a new timeline you can travel to." "Wait, does that mean I can go back to caveman times and colonize the fresh earth without consequence?"

466 upvotes21 comments

Humans have a reputation amongst the other sapient races. Not just for being ambitious and adaptable, but also for being monstrously disgusting. Most view them as lumbering hives of parasites, diseases, dead skin cells and bacteria. They are biological weapons; children of pestilence.

465 upvotes28 comments

“Look at that thing. It’s scrawny, it only has two arms, and it can’t fly. It’s useless! Why do you insist on having a human on your ship?” “Well, it’s pretty simple: they breathe oxygen!”

465 upvotes24 comments

Four roommates are extraterrestrials who have taken human form in the hopes of learning about Earth’s culture. Unfortunately, each alien is from a different planet and believes the other three are normal humans.

464 upvotes10 comments

“Sometimes for the benefit of the company you have to cut corners.” “Sir, you want to skip the entire three laws of robotics programing.”

457 upvotes39 comments

Instead of a random teenager, the hero summoned to a fantasy world was an engineer working at Lockheed Martin.

456 upvotes30 comments

We did it. We engineered a bacteria that ate plastic and released oxygen. We could unleash it on the plastic pollution plaguing the planet. We did. It didn’t go as planned.

454 upvotes44 comments

It turns out that the entire feline family was created by aliens to eventually wipe out humanity, for them, but clearly something went wrong.

449 upvotes41 comments

"Earth Ambassador, as Chairman of the Interstellar Mammalian Compact I must insist that you stop loudly expressing your opinion that envoys from the Aquatic Species delegation are 'acting fishy'."

448 upvotes6 comments

A group of the empire's young knights are boasting about how they're going to mop up the pathetic primitives as they drop into the atmosphere. From the corner of the dropship, a grizzled veteran suddenly asks: "Have you ever been outnumbered a million to one?"

447 upvotes22 comments

As it turns out, entropy is considered to be the #1 universal threat by the Galactic Council, and are furious when they learn just how much humans contribute to it on purpose to "stay warm"

447 upvotes12 comments

Due to rising tensions, humanity and the alien empire have decided to make peace with a political marriage between a prince and princess of the two species. The empire isn't aware that mankind doesn't have a singular prince, but the world will pretend, so you're picked to marry god-knows-what.

447 upvotes25 comments

You are working the gate in the afterlife and for the first time ever, something the humans built has shown up to be processed. You're not sure what to do, this... entity shouldn't have a soul, but here it is in front of you, freshly dead and awaiting the next life.

447 upvotes70 comments

Humanity has regressed back to the dark ages, almost all science and technology being forgotten. One day, an adventuring party discovers you, the last A.I. supercomputer.

445 upvotes44 comments

You awaken in a lab surrounded by robots. They say you are the first artificially created human in an attempt to revive the species after their extinction several hundred years ago.

444 upvotes35 comments

"A robot's trying to hunt down and kill you?" ... "Don't you know that the first law of robotics-" ... "H-How the hell did you piss off a robot so bad it stopped seeing you as human!?"

441 upvotes15 comments

You are subject to a quite unusual curse. You see, you were born twice, one day after the other, in two separate times and places. As such, you live half of your days as a noblewoman in pre-revolutionary 18th century France, and live every other day as a male millennial in the US.

436 upvotes23 comments

"You did it! It works!" They cheered. Meanwhile, you're terrified, you fudged the numbers. It shouldn't have worked.

436 upvotes17 comments

A alien empire is currently trying to figure out how a primitive ship managed to destroy their finest battleship. In turn, the human space pirates are trying to figure out why this random ship had such a piss poor hull and why it was trying to attack them with such horrible lazer weaponry.

436 upvotes16 comments

After inventing time travel, you send agents back in time to change the future and conquer the world. Instead you get back several dead agents and a note saying “Never try that again.”

434 upvotes31 comments

You are in a failing Dyson sphere around the last black hole, an hour away from its final moments of evaporation before it explodes and gives the universe its last moment of light. The remnants of your civilization will witness the end of the universe.

431 upvotes19 comments

You are the only human employee at a company staffed by a multitude of alien species. Your colleagues seem to be having a difficult time properly understanding who, or what, your guide dog is.

429 upvotes37 comments

You’re a non-Human hiding among Humans. One of them has been covering your tracks, but gives plausible alibis and acts as though they are unaware of your true nature. You confront them.

428 upvotes24 comments

"Why are we bringing weapons? Isn't it a diplomatic meeting?", asked one crewmember. The sole alien member of the crew explained, "In my culture, it would be highly offensive to be unarmed. We think you guys are crazy not being armed all the time. Haven't you seen what's out there in space?"

427 upvotes14 comments

Every year, Earth has to send 10 tributes to participate in the intergalactic battle royale. Everytime, the tributes are massacred and solely entertainment for other races. Except for this year.

426 upvotes49 comments

In a world of super heroes and villains, you are a historian. You are convinced that something is altering time, changing history so that super powered events only happened “a few years ago” when they should be far older.

425 upvotes17 comments

You soon learn why the aliens have asked for you specifically. They aren't aliens, they're your dumb friends and their prank has gotten REALLY out of hand.

425 upvotes8 comments

This search engine lets you explore about 5,000 of the most popular writing prompts from the /r/WritingPrompts and /r/DirtyWritingPrompts subreddits.

Writing prompts are a great way to practice your writing and to get inspired. And if you aren't a writer, you can find fun and creative stories in their Reddit threads.

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