Idea generator

18 Science Fiction Writing Prompts Prompts

These prompts create a starting constraint, question, or situation. Use one as written, combine two, or change the audience, setting, objective, or limitation to make a new exercise.

Choose a random prompt from the bank.
Prompt 1

A spacecraft receives maintenance instructions from a version of itself that has not launched yet.

Prompt 2

People can subscribe to curated dreams, and a customer receives someone else’s recurring nightmare.

Prompt 3

A fertility clinic discovers one embryo has a genetic sequence designed as a message.

Prompt 4

An asteroid-mining crew finds evidence that another human crew worked the site decades before spaceflight began.

Prompt 5

A social network verifies every statement for factual accuracy, causing new forms of manipulation built from technically true claims.

Prompt 6

A city bans private memory storage after a major data leak.

Prompt 7

An engineer builds a prosthetic that reports sensations from a limb the wearer never had.

Prompt 8

A deep-sea research station detects regular signals coming from geological layers older than life.

Prompt 9

A delivery drone refuses one address because its map predicts the building will not exist tomorrow.

Prompt 10

A colony votes to slow its communication delay artificially to preserve political independence from Earth.

Prompt 11

A language model trained only on legal archives begins predicting laws before legislators propose them.

Prompt 12

A medical treatment stops cellular aging but only while patients remain within a narrow magnetic field.

Prompt 13

A household robot starts saving broken objects because it believes repairability is a form of personhood.

Prompt 14

A climate model identifies one future that disappears whenever policymakers view it.

Prompt 15

A child on Mars develops allergies to materials considered harmless on Earth.

Prompt 16

A scientist can simulate personal decisions with 99% accuracy and becomes afraid to run one particular scenario.

Prompt 17

A prison sentence is served through accelerated subjective time, and one prisoner returns psychologically decades older after a week.

Prompt 18

A communications engineer discovers that background noise in interstellar messages contains a second conversation.