Alien Transformation Stories

17,347 results
Orientation
Length
Source
Infinite Scroll

Breeding Evolution

by kh211 on Jan 8, 2018
Science Fiction

The hangar was filled with noise. Hundreds of faceless troops were conversing with each other. Joking and laughing, making rude gestures with their pliable blank mannequin like bodies. At the end of the hangar, lights came up upon a stage with a single microphone. Behind the microphone, a brilliant purple flag swayed, the insignia of the planet Bredon flashi...

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E-Plague Inc.

by Cantalope on Jul 9, 2016
Science Fiction

A plague of eroticism has been unleashed on mankind! Choose and evolve a plague type to consume humanity as a carnal wave, a discreet converter, an unstoppable hive mind, or something else entirely...What's next? Marvel Earth D.C. Earth Author Guidelines Real Universe, USA Pokemon, Kanto Stargate, Earth resident evil What's next? Marvel Earth D.C. Earth...

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Leakers

by kingsy on Apr 3, 2020
Fetish

The aliens themselves were pretty excited when they discovered our planet. The more they analysed our living, moving, fornicating bodies going about our daily lives, the more they knew our bodies would be the perfect safe haven for their species. Growing their numbers after the near extinction on Betron 5, their last remaining planet, was paramount to any of...

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Lucy's Changing Life Ch. 03

by Hikolu on May 11, 2020
NonHuman

Author's Note: This story is my attempt at an Alien Invasion and takeover piece. Whilst I like my fiction to be largely original, the story of Jess, Amy, Lucy, and Claire is inspired by a variety of fictions that have come before. The work of H.R. Giger is the most obvious, but by no means the only reference. No ownership of any specific franchise or proper...

The Green Blob Ch. 13

by maestro84 on Sep 19, 2017
NonHuman

As the sun rose over the campus an attractive brunette named Gwen awoke after her transformation was complete. She looked over at her room mate Kelly who was still recovering from the partying she had done the night before. Gwen looked her over seeing if she had sobered up yet. She grabbed a bottle of water for her when she awoke to help her flush her system...

Atonement Ch. 03

by HalfShim on Jul 9, 2019
Sci-Fi & Fantasy

MU2 wasn't certain how often she orgasmed, her body floating in blackness. White noise filled the small chamber, reinforcing deep truths her subconscious already knew. She was a cow. She would produce more milk and increase her production. At some point the pleasure ceased and she drifted off to sleep, the machinery automatically detaching itself. She drea...

Mind Over Matter

by PeacefulWanderer on Nov 20, 2020
Science Fiction

Feedback and suggestions for other plot lines welcome. This is an attempt to get straight to the point - smut galore instead of a heavily story-driven style. I'll be adding branches for different characters, and maybe some options, too. Everyone featured in this story is 18 years or older. 'Mr Perfectly Bland.' That's what my first girlfriend called me when...

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Samus and the Reality Altering Upgrades

by welldressedcrab on Nov 14, 2020
Science Fiction

Samus brought her ship into dock with the station, the docking bay walls closing behind her. In her adventures through the galaxy she had received a signal from a remote research station. The signal informed her that the station was inhabited by a scientist AI which was programmed to keep inventing and researching for eternity. If she came to investigate, sh...

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The Truce

by eav on Dec 29, 2019
Fan Fiction

Winter on the Kent farm has always been a magical time. The white ocean of snow that surrounds the farm gives the impression that the farmhouse becomes an island in this vast sea. And inside the house the feeling of isolation is the same. Lois Lane, the wife of the current farm owner was sitting in front of her laptop re-reading the documents she had just re...

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Xenoplasm

by Xenos on Mar 7, 2015
Science Fiction

You've always been rather uncomfortable in the woods. Wild animals have never done anything to pique your curiosity about nature and the wonders to be beheld. Though you were rather a tom-boy as a little girl in the city, that meant that you were more into sports than playing with bugs and worms. If nothing else, your athletic childhood has helped to make yo...

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