Aliens

Stories that feature aliens.

  Child of:  Nonhuman. Related tags:  Aliens;Androids/Cyborgs;Goo People;Symbiotes.

  Tag Group:  Scifi.

A 5

Across the metaverse by BRK In a corner of a bustling shopping center parking lot, Joe finds something that shouldn’t be there. But… the sexy, three-legged, planet-saving hero Preter Garadin couldn’t possibly be real. Could he? 2 parts Added Jan 2023 1,274 views 4.8 stars (6 votes) 5,918 words •Multileg•Multilimb•Three Legs•Aliens •M/M

An airplane parasite by SomeMuscleGuy After bumping into the wrong person at the airport, Michael is infected with a parasite that was on its way to be destroyed. This parasite only has one goal in mind: Growth. Massive Growth. Added Oct 2022 25k views 4.8 stars (29 votes) 4,977 words •Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Hyper Cum•Multi-abs•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Butt Growth•Foot Growth•Transformation•Voice Deepening•Getting Taller•Giants•Size Increase•Destruction/Violence•Nonconsensual change•Infectious•Aliens•Symbiotes •M

Alien gym bro by SuperBlimp A mysterious and enormous stud shows up at Jessie’s gym, but there’s something not quite human about the hulking gorgeous man.  Added Nov 2023 4,439 views 4.5 stars (11 votes) 4,413 words •Huge Cock•Cum inflation•Replication•Muscle Growth•Male Pregnancy•Transformation•Size Increase•Inflation•Nonconsensual change•Aliens •M/M•M/M/M

Alien tormentors by James Fourlegs Unseen aliens juice the daylights out of their captives. Added Dec 2004 23k views 4.3 stars (6 votes) 1,004 words •Huge Cock•Multicock•Multiarm•Multileg•Multilimb•Replication•Muscle Growth•Muscle/Strength•Selfcest•Aliens

Among us by BRK Nathan Yates is an ordinary boy who’s just graduated from high school and whose biggest concern in life in trying to figure out why the hottest guy in school is making passes at him. That is, until he’s thrown into a story he knows intimately from his favorite cult graphic novels, and becomes embroiled in a conflict that reaches across worlds and universes. 15 parts Added May 2017 Updated 27 Apr 2018 26k views 4.4 stars (17 votes) 52k words (#64) •Huge Cock•Muscle/Strength•Amputation•Human to Animal/Anthro•Aliens•Werewolves•Mind Control •t/t

B 8

B.D.E. by Ziel While orbiting a nearby planet, the ship detects an unusual energy signature. Parker and Quill are sent down to investigate, but things take a turn for the smutty when Parker’s suit is compromised. Added Aug 2018 20k views 4.0 stars (7 votes) 3,531 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Hyper Cum•Aliens•Space Travel•Set in the Future •M/M

Beyond contact by BRK The trick to contacting aliens turns out to be sending only your mind. What you look like when you get there, though, isn’t quite what you’re used to. 3 parts Added Jun 2003 17k views 3.3 stars (9 votes) 1,437 words •Multi-abs•Multicock•Multiarm•Multileg•Multilimb•Three Legs•Replication•Selfcest•Aliens•Space Travel•Complete •M/M•M/M/M/...

The Black Knights: Coming home by Meddler Incs When an ex-football player, now a local newspaper reporter, investigates The Black Knights, he gets more than he bargained for. 14 parts Added Oct 2018 Updated 21 Dec 2019 21k views 4.9 stars (15 votes) 24k words •Cock Growth•Huge Cock•Muscle Growth•Muscle/Strength•Size Increase•Nonconsensual change•Aliens•Symbiotes •M/M•M/M/M

Blink and it’s gone by Double-U Mark is amazed he’s able to land a date with Connor, the unbelievably hot stud who approached him out of nowhere. But things get complicated when it turns out that Connor is not who he appears to be. 4 parts Added Jun 2017 12k views 4.6 stars (7 votes) 8,569 words •Muscle Growth•Muscle/Strength•Aliens

The book of desires by SomeMuscleGuy After stealing a corrupted book at the gym, Michael is left growing uncontrollably by a Symbiotic Demon that only wants to swell its victims with the most size possible. But even the demon underestimates just how gigantic Michael wants to become. Added Dec 2022 18k views 4.9 stars (9 votes) 7,676 words •Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Hyper Cum•Public Orgasm•Multi-abs•Addiction•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Muscle Worship•Public Nudity•Butt Growth•Foot Growth•Transformation•Voice Deepening•Getting Taller•Giants•Size Increase•Destruction/Violence•Nonconsensual change•Infectious•Aliens•Symbiotes•Complete•Stories with Images •M

Boytaurs from Outer Space! by BRK Sev, the commander of a Taurian survey mission, judges Earth suitable for cultivating an aggressive alien grain, but the danger to Earth’s ecosystem drives the idealistic Elek to rebel and flee with some valuable equipment. When a conflicted Kiyy chases him, they both encounter the strange inhabitants and discover that humans and Taurians find each other mutually captivating. 6 parts Added Jun 2015 Updated 14 Oct 2016 15k views 4.4 stars (16 votes) 13k words •Huge Cock•Multicock•Boytaur•Four Legs•Multiarm•Multileg•Multilimb•Muscle Growth•Muscle/Strength•Incest•Twins•Aliens•Space Travel •M/M•M/M/M•M/M/M/...

Building a species by ArdanWolfe When his homeworld faces annihilation, the sole survivor must find a new species capable of helping him preserve his race. Will he find what he needs on a tiny blue and green planet called Earth? 3 parts Added Jun 2021 6,639 views 5.0 stars (4 votes) 2,562 words •Cock Growth•Male Pregnancy•Transformation•Nonconsensual change•Aliens

Burst by BRK In a sealed-off underground bunker, exposure to a tear in the fabric of space-time created by an illegal energy experiment is producing some interesting changes in the men trapped inside. And on top of everything else, it’s Christmas, and there’s no way they’ll ever see home again… 3 parts Added Dec 2020 12k views 4.6 stars (13 votes) 11k words •Cock Growth•Huge Cock•Multicock•Replication•Other Mental Changes•Hyper Strength•Muscle Growth•Muscle/Strength•Always Shirtless•Stretchy•Getting Handsomer•Transformation•Getting Taller•Size Increase•Selfcest•Aliens•Christmas•Complete •M/M•M/M/M

C 3

Cave on the Moon by brazboy First contact? A large cave is identified on the Moon. It is apparently ancient, but also not at all natural. Humans, curious as ever, sent a team of astronauts to investigate it. What they find changes everything, and everyone, forever… 3 parts Added Nov 2021 12k views 4.4 stars (13 votes) 9,726 words •Always Hard•Cock Growth•Huge Balls•Huge Cock•Hyper Cock•Self-suck•Hyper Cum•Public Orgasm•Hyper Muscle•Hyper Strength•Immobility•Muscle Growth•Muscle/Strength•Increased Libido•Getting Taller•Giants•Plausible Size Difference•Size Decrease•Destruction/Violence•Nonconsensual change•Aliens•Androids/Cyborgs•Space Travel •M•M/M•M/M/M

A close encounter by King Dave Evan is not alone in his apartment. Something that wants to study him. Is that all that it wants? 3 parts Added Dec 2021 Updated 8 Jan 2022 9,812 views 4.8 stars (23 votes) 7,234 words •Cock Growth•Muscle Growth•Butt Growth•Getting Handsomer•Voice Deepening•Getting Hairy•First Time/Virgin•Aliens•Shapeshifting •M/M

Cockportal by BRK After a Halloween night ambulance ride ends up at the wrong hospital, Ronnie wakes up to find discover that his removed appendix isn’t the only thing that’s different about him. Added Nov 2018 11k views 4.0 stars (5 votes) 4,660 words •Cock Growth•Huge Cock•Aliens•Halloween •M

E 2

Empire by LenZelig A massive consolidation of the entire “Bill’s Education” universe, incorporating the previously separately posted “The Surfer”, “The Rescue”, “Spring Break”, “Pickup Trouble”, and “School Days”, “Empire” is the wide-ranging tale of easy transformation and even easier sex across all boundaries—friends, family members, genders, even species—as a fortunate crop of humans stumble into a wider universe of size, muscle, double-digit-length cocks and much, much more and discover the true meaning of shared, radical, uninhibited pleasure. 40 parts Added Apr 2019 Updated 1 May 2021 134k views 3.7 stars (6 votes) 366k words (#1) •Cock Growth•Huge Cock•Self-suck•Straight to Gay•Muscle Growth•Muscle/Strength•Getting Taller•Size Increase•Age Difference•Bestiality•First Time/Virgin•Incest•Brothers•Father/Son•Twins•Bisexual•Hetero Sex•Nonconsensual change•Sex-Slave•Shared Body•Aliens•Space Travel•Witch/Warlock/Wizard•Thanksgiving•Mind Control•Complete

The escape by hyperboi Sam and his brother find themselves taken in their sleep and trapped in some strange warehouse-like space, along with all the other teens in their community. Not only is there no way out, but something is happening to them all... Added Dec 2014 27k views 4.7 stars (22 votes) 3,492 words •Cock Growth•Huge Cock•Hyper Cock•Self-suck•Straight to Gay•Muscle Growth•Muscle/Strength•Incest•Brothers•Twins•Nonconsensual change•Aliens

L 1

The landing by C.W.P. Mulling the pointlessness of his life on a vacation to Alaska, Chris is thrilled to encounter a pair of extremely well endowed aliens. 3 parts Added Jul 2014 13k views 4.4 stars (12 votes) 7,254 words •Cock Growth•Huge Cock•Aliens•Space Travel •M/M

M 5

MaXXXed out by Now Voyager A cocky guy named Max visits a spa on the edge of town run by gorgeous women. But when he finds himself strapped into a transformative massage chair, he pays for his disrespectful flirting with his body.  Added Mar 2023 4,366 views 4.0 stars (3 votes) 6,629 words •Cock Pumping•Cock Shrinking•Other Mental Changes•Butt Growth•Belly Growth•Breast Expansion•Transformation•Human to Animal/Anthro•Getting Fatter•Misogyny•Nonconsensual change•Aliens•Complete •M/F/F

Means of escape by BRK Even for a randy space marine, life as a sex slave is not your first choice. But it looks like a distinct possibility after days of incarceration on the wrong planet. So when an offer of help arrives, it’s not something you ignore—even if the offer is telepathic and the help involves certain side-effects. Added May 2017 8,524 views 4.8 stars (4 votes) 3,970 words •Muscle/Strength•Stretchy•Aliens•Space Travel•Set in the Future

MIL: Men of Incredible Length by brazboy Ravi, or Oitresseis, is a transformed (mutated) agent of Brazil’s secret ministry dealing with magical and alien affairs. Now, a new drug—manufactured by human testicles parasitized by gooey aliens—is getting attention from his department, and it is his job to prevent its spread… 4 parts Added Oct 2023 Updated 28 Oct 2023 3,963 views 4.8 stars (5 votes) 15k words •Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Prehensile Cock•Self-suck•Cum inflation•Cum Milking•Hyper Cum•Nipple Emissions•Public Orgasm•Multicock•Lots of Legs•Multiarm•Multileg•Multilimb•Multipec•Replication•Hyper Muscle•Immobility•Muscle Growth•Increased Libido•Transformation•Getting Taller•Giants•Plausible Size Difference•Size Increase•Vore•Absorption•Shared Body•Aliens•Goo People•Complete •M/M•M/M/M

MooMilk by Meddler Incs The secrets of the newest workout supplement are about to be revealed. Added Aug 2020 8,489 views 4.7 stars (6 votes) 1,760 words •Nipple Emissions•Muscle Breast•Muscle/Strength•Aliens•Anthro/Furry

Muscle Mice From Mars by Mr. Mouse This is the story of a certain group of anthro alien biker mice and how they went from sexy, strong, and buff to hyper masculine and super strong with a little unintentional help from some old enemies. 2 parts Added Oct 2019 6,376 views 5.0 stars (3 votes) 3,260 words •Cock Growth•Huge Balls•Huge Cock•Hyper Cum•Hyper Muscle•Muscle Growth•Muscle/Strength•Size Increase•Destruction/Violence•Restraints•Aliens•Anthro/Furry

N 1

The night he came by Charles Westfall Thomas encounters alien visitors with equipment even bigger than his. Added Jul 2002 23k views 4.8 stars (6 votes) 7,839 words •Cock Growth•Hyper Cock•Self-suck•Hyper Cum•Muscle Growth•Muscle/Strength•Size Increase•Nanotech•Aliens

P 3

Pan-Galactic Human Fan Club by bluesuedewho Super-straight dude Charley gets abducted by a bunch of human-loving alien hunks. The beefy space bros keep telling him that humans are all naturally obsessed with sculpted muscles and huge dicks, but that’s crazy talk. So what if Charley occasionally slips away to jerk off to the thought of servicing giant alien dicks? That’s totally normal, right? Added Jul 2021 3,524 views 4.6 stars (5 votes) 5,323 words •Huge Cock•Other Mental Changes•Straight to Gay•Muscle/Strength•Plausible Size Difference•Aliens•Androids/Cyborgs

Parasitic paradise by SomeMuscleGuy After over a year of committing himself to a healthier lifestyle, Kyle finds himself down on his luck about his physical progress. Wanting to cheer him up, his boyfriend, Dom, surprises him with a ritual that is meant to help them grow. What neither realizes is that the being they summoned doesn't just want to see them grow. It wants them to see them ascend. 2 parts Added Oct 2023 Updated 4 Nov 2023 9,360 views 4.8 stars (13 votes) 9,011 words •Always Hard•Cock Growth•Huge Balls•Ball Growth•Huge Cock•Hyper Cock•Hyper Muscle•Hyper Strength•Muscle Growth•Muscle Worship•Increased Libido•Foot Growth•Gradual Change•Voice Deepening•Getting Taller•Giants•Size Increase•Dom/Sub•Infectious•Aliens•Symbiotes•Tentacle•Demons •M/M•M/M/M

Pollination by Absman420 The beginning of the most erotic alien invasion/muscle growth story… ever! Added Oct 2020 11k views 4.9 stars (17 votes) 5,867 words •Cock Growth•Huge Balls•Huge Cock•Muscle Growth•Muscle/Strength•Plants•Aliens •M/M

S 8

The Scrotoman by TlaloctheWeirdo A university student’s life is about to change when his best friend, one of the university’s top athletes, stashes a human-like alien in his room. 2 parts Added Apr 2021 Updated 1 May 2021 5,979 views 4,766 words •Huge Balls•Huge Cock•Muscle/Strength•Aliens

Self-improvement by BRK Cam needs to get the cute guy he’s dosed with a little bit of experimental physio-changing serum to say what he wants in order for the transformations to start. He’s planning to keep things small and subtle, only Aiden isn’t as bashful as he appears, and he’s also just a tiny bit drunk. Added Sep 2018 13k views 4.9 stars (12 votes) 4,175 words •Cock Growth•Huge Cock•Replication•Muscle Growth•Gradual Change•Suggestion•Selfcest•Aliens•Complete •M/M•M/M/M

The semenary by STrotman A twenty-eighth-century Marine on shore leave finds himself in a Semenary where cocks and masculinity are worshipped and semen is an elixir.  Added Nov 2023 534 views 5.0 stars (1 vote) 2,231 words •Huge Balls•Huge Cock•Multicock•Plausible Size Difference•Aliens•Space Travel •M/M

The shape of things to come by Mykkhal The growing intimacy between Tom and Harry is disrupted by the revelation that Harry isn’t who—or what—he appears to be. 13 parts Added Mar 2003 18k views 4.7 stars (10 votes) 32k words •Transformation•Aliens•Goo People•Space Travel•Shapeshifting•Set in the Future •M/M

It was a dark night by InflatedMuscle Gym rat Dane has an encounter with an alien symbiote, complicating not only his own life but his friends’ as well. 5 parts Added Oct 2022 Updated 15 Oct 2022 13k views 4.8 stars (16 votes) 34k words •Addiction•Straight to Gay•Hyper Muscle•Muscle Growth•Muscle/Strength•Nonconsensual change•Aliens•Symbiotes •M/M

The solitary flesh by Mikeytron A pair of space mercenaries are dispatched to a strange alien world to guard the manufacture of a massive quantity of the medical and cosmetic wonderdrug SynthStem, which allows humans to reshape their bodies. In part one, the stage is set and the stakes are raised. 4 parts Added Sep 2022 Updated 8 Oct 2022 13k views 5.0 stars (77 votes) 24k words •Huge Cock•Other Mental Changes•Hyper Muscle•Immobility•Muscle Growth•Muscle/Strength•Gradual Change•Merging•Aliens•Space Travel•Complete•Set in the Future •M/M

Summer breeze by Dave Swim hunk Mike is asked to employ his recently improved body and unstoppable libido in the service of intergalactic peace. Added Jun 2012 13k views 5.0 stars (7 votes) 5,170 words •Cock Growth•Huge Cock•Transformation•Aliens

Super Hard Planet Champions by BRK Logan and his buddies, along with the hot guy from the bowling alley Logan has a crush on, get pulled into a fight to save the universe from the evil Skorth. If only it didn’t involve wearing color-coded Lycra. 3 parts Added Aug 2017 Updated 11 May 2018 13k views 4.3 stars (6 votes) 19k words •Replication•Muscle Growth•Muscle/Strength•Size Increase•Selfcest•Lycra/Spandex•Aliens•Space Travel

T 4

The takeover by Flex Luthor An alien race employs sleek advertisement to turn Earth's top athletes into a horde of docile bodies in tubes, being pumped of their cum to create an army of supermasculine studs. 3 parts Added Aug 2017 Updated 15 Sep 2017 19k views 3.1 stars (8 votes) 3,014 words •Hyper Cock•Muscle Growth•Muscle/Strength•Transformation•Size Increase•Aliens•Mind Control

A taste of aedon by Josef Howard Adams and Evans survive the accidental explosion of their military vessel and land by life pod on the verdant class M planet Aedon. Added Mar 2004 16k views 4.9 stars (7 votes) 3,383 words •Cock Growth•Huge Cock•Straight to Gay•Muscle Growth•Muscle/Strength•Plants•Nonconsensual change•Aliens•Space Travel •M/M

The tournament by AG Silver A soldier enters a wrestling competition with an alien, whose touch reveals more than he ever expected. 4 parts Added Aug 2019 Updated 9 Nov 2019 9,762 views 4.4 stars (16 votes) 3,164 words •Cock Growth•Huge Balls•Huge Cock•Muscle Growth•Muscle/Strength•Aliens •M/M

The training program by BRK Recruited to take part in an intense and highly selective three-week LEO training program, Texas Ranger Dusty thinks he and his fellow trainees are in for a lot of hard work and conditioning. What he doesn’t know is what exactly these elite law-enforcement men are being trained for. 5 parts Added Aug 2021 13k views 4.4 stars (9 votes) 8,850 words •Always Hard•Cock Growth•Self-suck•Hyper Cum•Addiction•Other Mental Changes•Straight to Gay•Muscle Growth•Muscle/Strength•Always Shirtless•Increased Libido•Getting Handsomer•Gradual Change•Transformation•Getting Taller•Plausible Size Difference•Size Increase•Getting Hairy•Dom/Sub•Nonconsensual change•Sex-Slave•Aliens•Complete •M/M•M/M/M•M/M/M/...

U 1

An unexpected party by TheLegendOfSam Fashion model Zeke gets more than he bargained for at the agency’s annual Halloween party, this year hosted at one of the summer homes of his new billionaire colleague, and finds a whole new meaning for the phrase “sexy costume”… 2 parts Added Oct 2020 5,665 views 4.5 stars (4 votes) 4,699 words •Extra facial features•Multi-abs•Multicock•Multihead•All Legs•Multiarm•Multileg•Multilimb•Three Legs•Multitorso•Replication•Selfcest•Merging•Aliens•Centaurs•Mermen•Supernatural•Halloween

V 1

Vision space by BRK Sent to explore an unknown, derelict spaceship in search of usable technology, a young marine unexpectedly discovers three sexy inhabitants, guardians of a secret no one could have imagined. Added Jun 2021 8,777 views 5.0 stars (11 votes) 6,302 words •Cock Growth•Huge Cock•Hyper Cock•Hyper Muscle•Muscle Growth•Muscle/Strength•Transformation•Getting Taller•Giants•Size Decrease•Size Increase•Age Difference•Aliens•Space Travel•Complete•Set in the Future •M/M

W 3

What happens on Venus by Malice Slashlover Garrett has a lot of questions about the Venusians he’s living with as an exchange student, but the one he most wants an answer to is — why do Venusian guys have three cocks? 2 parts Added Jul 2014 10k views 4.8 stars (4 votes) 4,591 words •Multicock•Detachable•Aliens•Space Travel•Set in the Future •M/M

A whole new world by MarcusB00 Two siblings, looking for a profit, break into an abandoned facility for potential treasure. Along the way they accidentally open a portal and get sucked in, and one of them get woken up by young dude with muscle powers in a new world. 3 parts Added Nov 2020 Updated 26 Jun 2021 9,965 views 5.0 stars (5 votes) 10k words •Cock Growth•Huge Cock•Hyper Cum•Hyper Strength•Muscle Growth•Muscle/Strength•Destruction/Violence•Aliens

World of gods by STrotman Your basic “human gets stranded on a planet full of huge, hung aliens” story. Added Nov 2023 1,901 views 5.0 stars (2 votes) 2,781 words •Huge Cock•Hyper Cock•Hyper Cum•Multicock•Giants•Aliens•Space Travel •M/M/M