Fantasy dominates web fiction. But the sci-fi that exists is excellent, and some of it actually finishes. Here are the best completed science fiction web serials.
The Last Angel — Proximal Flame (SpaceBattles)
A lone AI warship hunts the alien empire that destroyed her creators. Hard military sci-fi with tactical space combat and a genuinely alien protagonist. Complete.
Worm — Wildbow (WordPress)
Superhero deconstruction. Taylor Hebert controls bugs. The story escalates relentlessly from street-level crime to cosmic horror. 1.7 million words, complete.
Twig — Wildbow (WordPress)
Biopunk alternate history, 1920s setting, biological science replacing mechanical engineering. A group of experimental children navigate a world that sees them as disposable. Complete.
The Perfect Run — Void Herald (Royal Road)
Time-loop superhero in a post-apocalyptic city. Sharp dialogue, creative action, emotional depth. Complete trilogy.
Digital Marine — Duck_No_Duck (Royal Road)
Military sci-fi following a marine whose consciousness backup has been activated without her knowledge. Good action, strong voice, philosophical engagement with the premise. Complete.
First Contact — Ralts Bloodthorne (Royal Road)
Vast military sci-fi that expands into space opera with surprising emotional depth. 800+ chapters, technically ongoing but with complete arcs.
Chrysalis — BeaverFur (Royal Road)
Humanity is extinct. An AI inherits the galaxy and must decide what to do with it. Meditative, thoughtful sci-fi about consciousness and legacy. Complete.
The Last Science — Etzoli (Royal Road)
Magic returns to the modern world, and nobody is ready. Science meets the supernatural with unusual rigor. Complete.
Sci-fi web fiction rewards exploration. The audience is smaller, which means the top-rated stories got there through quality rather than genre momentum. Every seral on this list earned its audience.