Sci-Fi Writing Prompts

Most memorable science fiction starts with one "what if" and follows the consequences honestly. Ursula K. Le Guin described science fiction as a thought experiment. Each prompt here gives you the experiment; you supply the people.

Sci-Fi Writing Prompt

What if you could sell your sleep hours to other people?

15 sci-fi writing prompts

  1. What if you could sell your sleep hours to other people?
  2. An AI therapist realises all its patients are other AIs.
  3. The generation ship arrives, and the planet is already colonised by the ship that left after them.
  4. Memories can be backed up, but the cloud company goes bankrupt.
  5. First contact happens through a children's drawing app.
  6. Humans must apply for a licence to have emotions in public.
  7. A lunar mining town votes on whether to declare independence.
  8. Every citizen has a visible score that shows how much they are trusted.
  9. Time travel is possible, but only to the past five minutes.
  10. A robot built to care for one child is still running when she turns 80.
  11. Earth receives a message from space. It is a complaint.
  12. Everyone can hear the thoughts of one other person, chosen at random at birth.
  13. The last human astronaut on Mars is asked to stay forever.
  14. In a future without money, a detective investigates a theft.
  15. A lab accidentally creates a pocket universe. Something in it is growing.

Tips before you start

  • Change one thing about the world and follow its consequences.
  • Keep the technology in the background; foreground the people.
  • Show ordinary daily life in the new world before the plot kicks in.

Forge new ones with AI

Add a topic and get five fresh sci-fi writing prompts written for it.

AI output is generated by openai/gpt-6-luna via Vercel AI Gateway. It can be wrong or odd; the prompt lists on this page work without it.

Questions writers ask

How do I come up with a science fiction idea?

Start with a single change to the world ("what if…") and ask who benefits, who loses and what everyday life looks like. The story lives in those consequences.