Sci-fi writing prompts are the fastest way to go from staring at a blank page to writing something genuinely unhinged about sentient toasters on a space station. That’s the point. Science fiction runs on the “what if?” question, and a good prompt hands you that question pre-loaded so you can skip the hard part and start writing immediately.
You don’t need to build a world from scratch. You don’t need to understand quantum physics. You just need a weird premise and a willingness to write badly for a few minutes.
This article gives you 30 sci-fi writing prompts organized by subgenre, from galaxy-spanning space operas to rain-soaked cyberpunk nightmares to whatever happens when you mash sci-fi with a cooking show. Each section includes a quick subgenre orientation and prompts specific enough to actually use, not the “write about the future” stuff that helps no one. A few sections also include example responses so you can see what a terrible first draft looks like in action.
Pick a subgenre. Pick a prompt. Write 200 words of garbage. That’s the whole assignment.
Why Sci-Fi Prompts Work Better Than a Blank Page
Sci-fi is the genre that whispers “what if?” and then refuses to answer its own question. That’s your job. But here’s the problem: sci-fi also whispers “you need a whole world first,” and that second whisper is what keeps most people from ever writing a word.
A prompt solves both problems at once.
The “What If?” Shortcut
Every sci-fi story starts with a question. What if gravity reversed for ten minutes every Tuesday? What if your refrigerator achieved consciousness and had opinions? The “what if?” is the engine, and when you sit down to a blank page, you have to build that engine from scratch. A prompt hands you the engine pre-built. You just have to drive it somewhere.
Sci-fi carries extra baggage. You don’t just have to write, you have to build a whole world first. Or at least that’s what it feels like. A prompt solves that problem because the world is already implied. You just have to live in it for 200 words.
Constraints Free Your Imagination
This sounds backwards, but research backs it up. A study published in Psychology of Aesthetics, Creativity, and the Arts found that creative constraints actually increase creative output compared to total freedom. The blank page says “write anything.” The prompt says “write about a space pirate who accidentally adopts an alien baby.” One of those is terrifying. The other is fun.
The more specific and weird the prompt, the less pressure you feel, which is why prompts that actually work tend to sound absurd rather than inspirational. You can’t write something “good” about a sentient dishwasher. You can only write something ridiculous. That’s the sweet spot.
Space Opera Prompts
Space opera is sci-fi turned up to eleven: sprawling galaxies, dramatic stakes, and characters who make questionable decisions at interstellar speed. The space opera tradition goes back decades, but you don’t need to know its history to write in it. Think massive scope, intense emotions, and at least one scene where someone stares meaningfully out a viewport.
Here are five prompts to get you started:
1. Your ship’s AI has developed a passive-aggressive personality and keeps “accidentally” venting the cargo bay every time you skip its software updates. Write the captain’s log entry after the third incident this week.
2. Two rival space empires have been at war for 300 years. The conflict started over a recipe. Write the diplomatic summit where someone finally asks what the recipe was for.
3. You’re a smuggler hauling illegal cheese across the galaxy. (Yes, cheese. It’s contraband in the Andromeda sector.) Your ship gets pulled over by customs.
4. The galaxy’s most feared bounty hunter retires and opens a bookshop on a quiet moon. Write the scene where a former target walks in looking for a birthday gift.
5. A generational starship has been traveling for 400 years. Nobody remembers why they left Earth. The ship’s historian just found out, and the answer is embarrassing.
Example response (Prompt 3):
The customs officer held the scanner like a weapon. “What’s in the hold?” I smiled. Casually. “Medical supplies.” The scanner beeped. The officer looked at me. Then at the scanner. Then back at me. “This reads as a wheel of aged Gouda.” I maintained eye contact. “Like I said. Medical supplies.” The officer sighed. This was clearly not the first time someone had tried to smuggle dairy through the Andromeda checkpoint.
Cyberpunk Prompts
Cyberpunk lives in the gap between high technology and low life: neon-lit cities, corporate overlords, hackers scraping by in the digital margins. The aesthetic is rain-soaked and morally gray. The technology is advanced. The humans using it are still a mess.
1. Your neural implant starts showing you targeted ads in your dreams. Tonight’s sponsor: a funeral home. Write the nightmare.
2. A hacker breaks into a megacorporation’s server and finds nothing but thousands of folders labeled “DO NOT OPEN.” She opens one. It’s a recipe for banana bread. She opens another. Also banana bread. Write what happens when she opens the last folder.
3. Cybernetic limbs are so common that “original” humans are now the weird ones. Write a first date between someone fully augmented and someone completely organic.
4. The city’s rain is synthetic, designed by a corporation to keep people indoors so they shop online. Today the rain stopped. Nobody knows what to do outside.
5. You’re an underground tattoo artist, but instead of ink, you implant code under people’s skin. Your latest client wants you to install something that will make them invisible to every camera in the city.
Example response (Prompt 1):
I dreamed I was at the beach. The ocean was warm. The sun was golden. A seagull landed on my towel and looked directly into my eyes. “Have you considered pre-planning your funeral arrangements?” it asked. “Sunset Memorial Gardens offers competitive rates and a loyalty program.” I woke up screaming. The implant pulsed behind my ear, soft and satisfied, like a cat that had just knocked something off a shelf on purpose.
Post-Apocalyptic Prompts
Post-apocalyptic sci-fi picks up after the world has already ended. The disaster happened. Now what? These stories are about survival, rebuilding, and discovering what humans become when the old rules stop applying.
1. The apocalypse was caused by a software update. Every smart device on Earth crashed simultaneously, and civilization, which had become entirely dependent on them, collapsed within a week. Write the moment someone realizes they don’t know how to open a can without asking their smart speaker.
2. Fifty years after the collapse, a group of kids finds a working vending machine. They have no idea what any of the products are. Write their attempt to figure out what “Diet Dr. Pepper” was.
3. Plants evolved faster than anyone expected after the radiation. Your garden now has opinions about your lifestyle choices. Write the confrontation.
4. A librarian protects the last physical library on Earth. Today, someone arrived offering to trade three goats for a cookbook. The librarian is seriously considering it.
5. Every human on Earth forgot the last 200 years of history simultaneously. The year is 2340, but everyone woke up believing it’s 2140. Write the press conference.
First Contact Prompts
First contact stories are about the moment humanity meets something not human. They’re also, underneath all the alien stuff, about communication, misunderstanding, and the very human fear of being completely out of your depth.
1. Aliens arrive and they’re not interested in world leaders or scientists. They want to speak to whoever runs the local Denny’s. Write the meeting.
2. The first alien transmission Earth receives is a one-star Yelp review of our planet. Write the review.
3. An alien species lands, studies humanity for a week, and concludes that dogs are the dominant species. They request a diplomatic meeting with a golden retriever named Biscuit. Write the State Department’s response.
4. First contact happens, but the aliens communicate exclusively through interpretive dance. The UN hires a ballet company as emergency translators.
5. Aliens have been observing Earth for centuries but only through our TV broadcasts. They arrive expecting everyone to behave like sitcom characters. Write the misunderstanding.
Hard Sci-Fi Prompts
Hard sci-fi takes the science seriously. Stories in this subgenre build on real physics, biology, or engineering and then ask what happens when things go sideways. You don’t need a PhD to write these, though. You just need a “what if?” grounded in something real.
1. A space station’s artificial gravity fails in one section, but only on Wednesdays. The engineering team can’t find the bug. Write the maintenance report.
2. A biologist on Mars discovers that the soil samples are slowly eating through their containment units. The samples aren’t alive. At least, they weren’t last week.
3. Faster-than-light travel exists, but it ages the traveler in reverse. A pilot who makes too many jumps keeps getting younger. She’s 45 and looks 12. Write the airport security interaction.
4. A deep-sea research station picks up a radio signal from directly below them. The signal is coming from inside the Earth’s crust. It’s a countdown.
5. Scientists invent teleportation, but it has a 0.3% chance of scrambling your molecules. Write the Terms and Conditions.
Genre Mashup Prompts
Genre mashups take sci-fi and smash it into something it was never supposed to touch. Romantic comedy in space. Noir detective story on Mars. Cooking show during the apocalypse. The weirder the combination, the more fun the writing.
1. A Great British Bake Off-style competition, except it’s on a space station and half the ingredients are alien. One contestant just substituted “Martian yeast” and the bread is growing legs.
2. A Regency romance, but set in a cyberpunk megacity. Lord Ashington has just had his monocle upgraded to a retinal scanner. Lady Pemberton’s fan is also a plasma weapon.
3. A murder mystery on a generation ship, but the detective is the ship’s janitor who only took the case because the real detective was the victim.
4. A nature documentary narrated in the style of David Attenborough, but the subject is office workers in a post-apocalyptic wasteland. “Here we observe the middle manager in its natural habitat, carefully rationing the last of the instant coffee.”
5. A heist movie, but the crew is stealing the moon. Not landing on it. Stealing it. The whole thing. Write the planning meeting.
Example response (Prompt 4):
“The middle manager emerges from its cubicle den, scanning the horizon for threats. Finding none, it adjusts its tie, a vestigial behavior from the Before Times, and begins the morning ritual of boiling water over a trash fire. Remarkably, it still checks its wristwatch, despite the fact that time zones collapsed along with most of the Eastern seaboard three years ago. Force of habit, one supposes.”
How to Actually Use These Prompts
Thirty prompts are useless if they sit in a browser tab you never come back to. Here’s how to actually turn them into writing.
The 200-Word Garbage Method
Set a timer for ten minutes. Pick any prompt. Write 200 words. Don’t research. Don’t outline. Don’t worry about whether your science is accurate or your aliens are plausible. The goal is 200 words of garbage, and anything beyond that is a bonus.
I use prompts as a warmup, not a homework assignment. Some days the prompt leads somewhere interesting. Most days it produces 200 words of nonsense I’ll never look at again. Both outcomes are fine. The point is that I sat down and wrote.
If you write badly every day, you’re still writing every day. That’s how habits form. Not through inspiration, but through repetition so low-stakes it barely counts as effort.
Pick the Subgenre That Sounds Fun
Don’t overthink it. You don’t need to read a stack of cyberpunk novels before writing a cyberpunk prompt response. If neon cities and hacker culture sound fun, start there. If you’d rather write about sentient plants in a post-apocalyptic garden, go for it. The subgenre labels are starting points, not gatekeepers.
The prompts above are designed to work even if you’ve never read a single sci-fi book, and if you want more genre-agnostic strangeness, we have a whole collection of absurd writing prompts built on the same philosophy. They give you enough world to start writing without requiring a degree in astrophysics or a subscription to the Encyclopedia of Science Fiction.
Go Write Something Terrible
Thirty prompts. Six subgenres. Zero excuses to stare at a blank page.
Sci-fi is the genre built on asking “what if?” and these prompts have already answered that question for you. Your only job is to pick one, write badly for ten minutes, and see what happens. Maybe you’ll write a terrible scene about an alien Yelp review. Maybe your cyberpunk tattoo artist will turn into a short story. Maybe you’ll produce 200 words of absolute nonsense and close your laptop feeling weirdly satisfied.
All of those outcomes count.
If any of this sounded fun, BadDrafts sends you a new absurd writing prompt every day and tracks your streak. No pressure to be good. Write daily. Write badly. Start your first terrible draft at baddrafts.com.