Scifi Tag Group

• A.I. by Corwin  [  ]  Tim’s homemade A.I. software decides to help him get huge.  •Huge Cock •Cum Milking •Addiction •Hyper Muscle •Muscle Growth •Muscle/Strength •Muscle Worship •Gradual Change •Plausible Size Difference •Size Increase •A.I.-Controlled Change •Destruction/Violence •Restraints •Androids/Cyborgs •Complete •M/M  Added Dec 2013 11 parts 30,556 words 66,346 views 4.8 stars (41 votes)
• 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?  •Multileg •Multilimb •Three Legs •Aliens •M/M  Added Jan 2023 2 parts 5,918 words 719 views 4.8 stars (6 votes)
• 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.  •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  Added Oct 2022 4,977 words 15,016 views 4.7 stars (25 votes)
• Alien implants (revised) by WordShop  [  ]  Three twenty-year-old military brats have a close encounter that leaves behind unexpected surprises for them all. How do three young guys deal with something that they cannot even begin to explain or understand? Not to mention the very strange dreams…  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Getting Hairy •Symbiotes  Added Nov 2017 2 parts 3,079 words 21,927 views 3.7 stars (15 votes)
• Alien tormentors by James Fourlegs  [  ]  Unseen aliens juice the daylights out of their captives.  •Huge Cock •Multicock •Multiarm •Multileg •Multilimb •Replication •Muscle Growth •Muscle/Strength •Aliens  Added Dec 2004 1,004 words 22,076 views 4.3 stars (6 votes)
• Alone at home by BigLutris and Daenotis  [  ]  When a humaniform android becomes aroused during a morning reverie, he might have more options to bring himself relief than ordinary folks.  •Self-suck •Detachable •Androids/Cyborgs  Added Nov 2019 1,427 words 4,532 views
• 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.  •Huge Cock •Muscle/Strength •Amputation •Human to Animal/Anthro •Aliens •Werewolves •Mind Control •t/t  Added May 2017 Updated Apr 2018 15 parts 52,459 words 24,485 views 4.4 stars (17 votes)

• 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.  •Cock Growth •Huge Balls •Huge Cock •Hyper Cock •Hyper Cum •Aliens •Space Travel •Set in the Future •M/M  Added Aug 2018 3,531 words 18,217 views 4.0 stars (7 votes)
• Basically a god by CurlyJin  [  ]  What do you do when the kid you bullied in high school becomes a god?  •Cock Growth •Huge Balls •Hyper Cock •Hyper Cum •Getting Taller •Giants •Size Increase •Bisexual •Hetero Sex •Lycra/Spandex •Space Travel •Superhero/Supervillain •Flying •X-Ray Vision •M/M  Added Jul 2016 Updated Jun 2019 9 parts 31,027 words 76,574 views 4.3 stars (23 votes)
• 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.  •Multi-abs •Multicock •Multiarm •Multileg •Multilimb •Three Legs •Replication •Aliens •Space Travel •Complete •M/M •M/M/M/...  Added Jun 2003 3 parts 1,437 words 14,874 views 3.3 stars (9 votes)
• The Black Knights by Meddler Incs  [  ]  Once you join the infamous college team known as the Black Knights, there are only three things that matter: lifting, fucking, and football.  •Muscle Growth •Muscle/Strength •Symbiotes •Series •M/M •M/M/M/...  Added Aug 2016 Updated May 2017 4 parts 6,479 words 21,744 views 4.6 stars (27 votes)
• The Black Knights: Brandon by Meddler Incs  [  ]  “So ya wanna be a jock, bro?” Baker asks. Yeah, Brandon so wants to be a jock.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Symbiotes •Series  Added Sep 2018 645 words 10,749 views 4.5 stars (6 votes)
• 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.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Size Increase •Nonconsensual change •Aliens •Symbiotes •Series  Added Oct 2018 Updated Dec 2019 14 parts 23,531 words 19,332 views 4.9 stars (15 votes)
• 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.  •Muscle Growth •Muscle/Strength •Aliens  Added Jun 2017 4 parts 8,569 words 11,391 views 4.6 stars (7 votes)
• 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.  •Cock Growth •Ball Growth •Huge Balls •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  Added Dec 2022 7,676 words 9,833 views 4.9 stars (8 votes)
• 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.  •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/...  Added Jun 2015 Updated Oct 2016 6 parts 13,050 words 14,723 views 4.4 stars (16 votes)
• 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?  •Cock Growth •Male Pregnancy •Transformation •Nonconsensual change •Aliens  Added Jun 2021 3 parts 2,562 words 5,307 views
• 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…  •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 •Aliens •Christmas •Complete •M/M •M/M/M  Added Dec 2020 3 parts 11,494 words 10,270 views 4.6 stars (13 votes)

• 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…  •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  Added Nov 2021 3 parts 9,726 words 10,115 views 4.3 stars (11 votes)
• 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?  •Cock Growth •Muscle Growth •Butt Growth •Getting Handsomer •Voice Deepening •Getting Hairy •First Time/Virgin •Aliens •Shapeshifting •M/M  Added Dec 2021 Updated Jan 2022 3 parts 7,234 words 8,647 views 4.8 stars (22 votes)
• 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.  •Cock Growth •Huge Cock •Aliens •Halloween •M  Added Nov 2018 4,660 words 9,898 views 4.0 stars (5 votes)
• Colt chronicles: A form for any occasion by Neltharion5  [  ]    •Huge Cock •Multilimb •Muscle Growth •Muscle/Strength •Transformation •Time Travel •Centaurs •Shapeshifting •Series  Added Feb 2010 5,218 words 16,513 views 3.6 stars (8 votes)
• Cursed compression top by Rurik  [  ]  A cursed compression top will transform its wearer beyond his wildest dreams.  •Muscle Growth •Transformation •Body Suit •Symbiotes •M/M  Added May 2020 Updated Jun 2020 3 parts 3,136 words 10,964 views 4.5 stars (15 votes)

• Double by Natty Soltesz  [  ]  Trying out a friend’s new sex robot.  •Bisexual •Androids/Cyborgs  Added Jul 2021 3,637 words 2,395 views

• 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.  •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 •Series  Added Apr 2019 Updated May 2021 40 parts 365,561 words 128,377 views 3.4 stars (5 votes)
• Enhanced muscle and futuristic porn by Marquis de Rent  [  ]  In a futuristic space convoy, a young doctor builds his career on groundbreaking male enhancements.  •Cock Growth •Huge Cock •Hyper Cock •Female to Male •Immobility •Muscle Growth •Muscle/Strength •Transformation •Plausible Size Difference •Size Increase •Nanotech •Space Travel •Set in the Future •M/M •M/M/M  Added Sep 2016 5 parts 25,251 words 31,310 views 4.5 stars (27 votes)
• 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...  •Cock Growth •Huge Cock •Hyper Cock •Self-suck •Straight to Gay •Muscle Growth •Muscle/Strength •Incest •Brothers •Twins •Nonconsensual change •Aliens  Added Dec 2014 3,492 words 25,250 views 4.7 stars (21 votes)
• Exploring Glen’s inner spaces by Just Gay Sex  [  ]  After escaping Belinda’s ray gun blasts by leaping aboard the nearest starship Glen had found himself a stowaway on the famous Phallic Explorer. Whether or not landing on the ultimate male sexual cruise was going to work out for him he had no idea, but as always he enjoyed the initial take off and exit from the system.  •Multicock •Mouthcock •Space Travel •M/M  Added Oct 2010 2 parts 2,329 words 11,753 views

• First costume by Cockatrice  [  ]  Luke is invited to a special Halloween party, though he does not know yet just how special that party is going to be.  •Cockless •Multihead •Wristfeet •Crotchhead •Detachable •Transformation •Body Suit •Human to Inanimate •Mouthcock •Rubber/Latex •Merging •Androids/Cyborgs •Centaurs •Halloween •M/M •M/M/M  Added Oct 2020 6,359 words 8,100 views 4.9 stars (12 votes)
• Fortitude by BRK  [  ]  A starship full of hot young recruits gets marooned in a strange part of space that seems to have an augmenting effect on the crew, leaving the AI and the unexpectedly immune commander to try to get them free.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Size Increase •Space Travel •M/M •M/M/M/...  Added Aug 2009 Updated Dec 2022 4 parts 14,755 words 36,446 views 4.8 stars (50 votes)
• Future perfection by Unknown  [  ]    •Body Swap •Time Travel  Added May 2003 3,416 words 13,478 views

• Gym of 1000 studs by LorneLyon  [  ]  Somewhere there is a special gym, a gym that will allow you to overcome your problems and give you something in return. One day Tobias is on the run for his bullies when he discovers the Gym of 1000 studs. He decides to go in and ends up changing his life.  •Muscle Growth •Space Travel •Time Travel •Supernatural •M/M  Added Mar 2020 2 parts 5,277 words 4,586 views

• Homeward by BRK  [  ]  Getting home by teleport is tough enough, but it's even more of a hassle when the teleporter is malfunctioning and doesn’t register that you’ve already been reconstructed on the other side.  •Replication •Getting Taller •Merging •Space Travel •Set in the Future  Added Dec 2002 1,909 words 8,602 views

• 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.  •Cock Growth •Huge Cock •Aliens •Space Travel •M/M  Added Jul 2014 3 parts 7,254 words 12,289 views 4.4 stars (12 votes)
• Dragon’s Horde: Lowered into the drink by STrRedWolf  [  ]  Be careful what you drink, because you may become the monster of your dreams before paying the price... your bar tab.  •Huge Cock •Hyper Cock •Multihead •Multiarm •Multilimb •Multipec •Replication •Stacking •Muscle Growth •Muscle/Strength •Giants •Symbiotes •Anthro/Furry •Alcohol •Series  Added Oct 2017 1,605 words 9,828 views

• Matt and his dad by Meddler Incs  [  ]  When Matt comes home to visit his dad, he is forced into being part of The Crew.  •Huge Cock •Straight to Gay •Muscle Growth •Muscle/Strength •Incest •Father/Son •Nonconsensual change •Symbiotes •Hypnosis •Series  Added Jun 2020 3,343 words 12,298 views 4.4 stars (7 votes)
• 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.   •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  Added Mar 2023 6,629 words 1,531 views
• 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.  •Muscle/Strength •Stretchy •Aliens •Space Travel •Set in the Future  Added May 2017 3,970 words 7,992 views
• Megabot, Pinto Roxo, and the Inventor’s superweapon by brazboy  [  ]  Megabot faces the muscle-serum-crazed Inventor—but the real challenge is figuring out how to deal with the villain’s secret superweapon.  •Huge Cock •Hyper Muscle •Hyper Strength •Immobility •Muscle Growth •Size Increase •Nanotech •Androids/Cyborgs •Superhero/Supervillain •Series •M/M  Added Aug 2022 3,175 words 2,407 views
• MooMilk by Meddler Incs  [  ]  The secrets of the newest workout supplement are about to be revealed.  •Nipple Emissions •Muscle Breast •Muscle/Strength •Aliens •Anthro/Furry  Added Aug 2020 1,760 words 7,515 views
• Muscle bots by Meddler Incs  [  ]  Have a problem with your device? The Department of Cybernetic Deviations is here to help!  •Muscle/Strength •Androids/Cyborgs •Set in the Future  Added Jan 2018 2 parts 1,955 words 7,707 views 4.8 stars (5 votes)
• 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.  •Cock Growth •Huge Balls •Huge Cock •Hyper Cum •Hyper Muscle •Muscle Growth •Muscle/Strength •Size Increase •Destruction/Violence •Restraints •Aliens •Anthro/Furry  Added Oct 2019 2 parts 3,260 words 5,539 views

• The night he came by Charles Westfall  [  ]  Thomas encounters alien visitors with equipment even bigger than his.  •Cock Growth •Hyper Cock •Self-suck •Hyper Cum •Muscle Growth •Muscle/Strength •Size Increase •Nanotech •Aliens  Added Jul 2002 7,839 words 21,811 views 4.8 stars (5 votes)

• The other side by BRK  [  ]  Avery, a randy cargohauler, is piloting his navship through the dimensions between the point A and point B when an unexpected breach sends him into a surreal expanse… where a well-built, winged figure takes a less-than-angelic interest in him.  •Cock Growth •Huge Cock •Hyper Cock •Wings •Muscle/Strength •Plausible Size Difference •Space Travel •Centaurs •Mermen •Complete •Set in the Future •M/M  Added Mar 2021 6,407 words 4,246 views 4.9 stars (7 votes)

• 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?  •Huge Cock •Other Mental Changes •Straight to Gay •Muscle/Strength •Plausible Size Difference •Aliens •Androids/Cyborgs  Added Jul 2021 5,323 words 2,949 views 4.6 stars (5 votes)
• Pollination by Absman420  [  ]  The beginning of the most erotic alien invasion/muscle growth story… ever!  •Cock Growth •Huge Balls •Huge Cock •Muscle Growth •Muscle/Strength •Plants •Aliens •M/M  Added Oct 2020 5,867 words 9,770 views 4.9 stars (17 votes)
• Pre-trip conditioning by WordShop  [  ]  As humans expand into space in the 22nd century, Gerry takes a job on a mining colony, little anticipating how much the experiience will change him.  •Muscle/Strength •Getting Hairy •Space Travel •Set in the Future •M  Added May 2003 4,059 words 11,080 views
• The price by Mikeytron  [  ]  Anthony’s husband, Tom, has just turned 40, and is in despair that his body will never become what he wants it to be. Anthony feels powerless to help, until a mysterious entity gives him the opportunity to rewrite Tom’s past– but there is always a price. A dark but hopefully redemptive story about desperation, time travel, and love.  •Cock Growth •Other Mental Changes •Hyper Muscle •Immobility •Muscle Growth •Gradual Change •Retcon •Time Travel •Supernatural •Complete •M/M  Added May 2022 Updated Jun 2022 5 parts 19,044 words 12,464 views 5.0 stars (31 votes)

• The queen by Dylan Utah  [  ]  As a big muscle alpha on campus, Peter had been used to admiration and envy. What he didn’t expect was to be captured and used for his growing muscles and cock.  •Cock Growth •Huge Balls •Huge Cock •Hyper Cock •Hyper Cum •Immobility •Muscle Growth •Muscle/Strength •Nonconsensual change •Symbiotes  Added Aug 2020 880 words 10,611 views 4.3 stars (7 votes)

• Recover and repair by jaysize14  [  ]  Sex in the future is subject to technological advances, but bugs and upgrades will never go away.  •Huge Cock •Androids/Cyborgs •Set in the Future  Added Aug 2015 1,574 words 10,539 views
• Robopocalypse by Johan Johnson  [  ]  Set in a future where people can purchase a wide range of useful robots commercially, this story is an account of a young man’s first sexual encounter with his, and as an escape into the wild possibilities our future may bring.  •Androids/Cyborgs •Set in the Future  Added Sep 2012 1,373 words 10,385 views

• 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.  •Huge Balls •Huge Cock •Muscle/Strength •Aliens  Added Apr 2021 Updated May 2021 2 parts 4,766 words 5,379 views
• 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.  •Cock Growth •Huge Cock •Replication •Muscle Growth •Gradual Change •Suggestion •Aliens •Complete •M/M •M/M/M  Added Sep 2018 4,175 words 12,315 views 4.9 stars (12 votes)
• The Servonyx exclusion by BRK  [  ]  Uncovering some corporate skulduggery leads to dire consequences for Beck. Nearly killed in a suspicious crash, he soon finds himself halfway around the world trapped in a physically enhanced pleasure humaniform… in the keeping of a handsome Russian plutocrat. Pleasure is easy to unlock in this new existence, but escape and revenge will be a lot harder to manage.  •Cock Growth •Multiarm •Multilimb •Muscle Growth •Size Increase •Age Difference •Nonconsensual change •Androids/Cyborgs •M/M  Added Jul 2018 Updated Nov 2018 3 parts 13,885 words 9,447 views 5.0 stars (9 votes)
• Shaming the boastful centaur by DracumSum  [  ]  Bill makes a joke, and a Greek goddess makes it real.  •Cock Growth •Huge Cock •Self-suck •Hyper Cum •Public Nudity •Getting Hairy •Hairless •Retcon •Time Travel •Supernatural •M/M  Added Oct 2022 Updated Jan 2023 3 parts 20,775 words 4,478 views 5.0 stars (8 votes)
• 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.  •Transformation •Aliens •Goo People •Space Travel •Shapeshifting •Set in the Future •M/M  Added Mar 2003 13 parts 31,913 words 17,428 views 4.7 stars (10 votes)
• The silver alchemist by BRK  [  ]  Alex and Jessie are two apprentice sorcerer-alchemists playing with spells they haven’t quite mastered, when a casting takes an unexpected turn.  •Transformation •Getting Hairy •Retcon •Time Travel •Witch/Warlock/Wizard •Metabods 25 •Invisibility •Complete •19th Century •M/M  Added Jan 2022 2 parts 6,932 words 2,894 views 4.8 stars (5 votes)
• Slimed by Dylan Utah  [  ]  Gym rat Dane has an encounter with an alien symbiote, complicating not only his own life but his friends’ as well.  •Addiction •Straight to Gay •Hyper Muscle •Muscle Growth •Muscle/Strength •Nonconsensual change •Aliens •Symbiotes •M/M  Added Oct 2022 5 parts 33,918 words 10,910 views 4.8 stars (18 votes)
• 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.  •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  Added Sep 2022 Updated Oct 2022 4 parts 23,643 words 10,987 views 5.0 stars (75 votes)
• Space clones by Josh Dugan  [  ]  A brilliant cousin, like his spaceship, is full of himself, but there's room for one more.  •Four Legs •Multiarm •Multilimb •Replication •Space Travel •Set in the Future  Added Nov 1998 2,338 words 8,348 views 4.1 stars (8 votes)
• The spectacular growing saga by West  [  ]  A collection of brief stories about guys discovering their dream bodies in various ways.  •Cock Growth •Cock Shrinking •Huge Cock •Hyper Cock •Hyper Cum •Multi-abs •Multicock •Multiarm •Multipec •Hyper Strength •Muscle Growth •Muscle Theft •Getting Taller •Size Decrease •Incest •Brothers •Triplets •Infectious •Androids/Cyborgs •M/M •M/M/M  Added Mar 2022 Updated Apr 2022 6 parts 7,557 words 9,693 views 4.6 stars (14 votes)
• Speedo transformation by bruce  [  ]  That castmate in your high school play with the hot cock, great body, and perfect ass has a secret: special Speedos. And he’s very willing to share.  •Cock Growth •Huge Cock •Muscle Growth •Muscle/Strength •Transformation •Symbiotes  Added Feb 2009 2,096 words 57,493 views 3.9 stars (15 votes)
• The suit life by Sithspawn  [  ]  Max’s housemate Jake creates a protoplasmic suit to heal soldiers in the field and decides to try it out at home. What could possibly go wrong?  •Cock Growth •Huge Cock •Muscle Growth •Size Increase •Body Suit •Tongue Growth •Rape •Symbiotes •Superhero/Supervillain •Shapeshifting •M/M  Added Apr 2022 5,597 words 6,379 views 4.8 stars (16 votes)
• Summer breeze by Dave  [  ]  Swim hunk Mike is asked to employ his recently improved body and unstoppable libido in the service of intergalactic peace.  •Cock Growth •Huge Cock •Transformation •Aliens  Added Jun 2012 5,170 words 12,148 views 5.0 stars (6 votes)
• 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.  •Replication •Muscle Growth •Muscle/Strength •Size Increase •Lycra/Spandex •Aliens •Space Travel  Added Aug 2017 Updated May 2018 3 parts 18,764 words 12,646 views 4.3 stars (6 votes)

• 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.  •Hyper Cock •Muscle Growth •Muscle/Strength •Transformation •Size Increase •Aliens •Mind Control  Added Aug 2017 Updated Sep 2017 3 parts 3,014 words 17,752 views 3.1 stars (8 votes)
• 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.  •Cock Growth •Huge Cock •Straight to Gay •Muscle Growth •Muscle/Strength •Plants •Nonconsensual change •Aliens •Space Travel •M/M  Added Mar 2004 3,383 words 14,929 views 5.0 stars (5 votes)
• The tournament by AG Silver  [  ]  A soldier enters a wrestling competition with an alien, whose touch reveals more than he ever expected.  •Cock Growth •Huge Balls •Huge Cock •Muscle Growth •Muscle/Strength •Aliens  Added Aug 2019 Updated Nov 2019 4 parts 3,164 words 8,808 views 4.4 stars (15 votes)
• Toy story by LenZelig  [  ]  During a storm Bob stumbles across a strange webpage offering something called “The Ultimate Sex Machine”. Intrigued, he clicks “order”, expecting maybe a sophisticated sex toy. Instead he gets Randy, a hunk-shaped machine dedicated to ensuring that Bob experiences ultimate sexual possibilities from now on and willing to reshape reality to make it happen.  •Muscle Growth •Muscle/Strength •Age Difference •Incest •Father/Son •Twins •Androids/Cyborgs •Space Travel •Complete •M/M •M/M/M/... •M/t •t/t  Added Jul 2002 2 parts 6,947 words 28,834 views 5.0 stars (27 votes)
• 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.  •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/...  Added Aug 2021 5 parts 8,850 words 11,636 views 4.4 stars (8 votes)
• 21-year-old scotch by Cris Kane  [  ]  On his 50th birthday, a closeted man enters a gay bar and is given a drink with an unexpected side effect.  •Huge Cock •Muscle/Strength •Age Regression •Time Travel •Witch/Warlock/Wizard  Added Aug 2019 Updated Sep 2019 9 parts 45,980 words 8,842 views 4.6 stars (5 votes)

• 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”…  •Extra facial features •Multi-abs •Multicock •Multihead •All Legs •Multiarm •Multileg •Multilimb •Three Legs •Multitorso •Replication •Merging •Aliens •Centaurs •Mermen •Supernatural •Halloween  Added Oct 2020 2 parts 4,699 words 4,865 views

• 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.  •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  Added Jun 2021 6,302 words 7,294 views 5.0 stars (11 votes)

• 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?  •Multicock •Detachable •Aliens •Space Travel •Set in the Future •M/M  Added Jul 2014 2 parts 4,591 words 9,708 views
• 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.  •Cock Growth •Huge Cock •Hyper Cum •Hyper Strength •Muscle Growth •Muscle/Strength •Destruction/Violence •Aliens  Added Nov 2020 Updated Jun 2021 3 parts 10,278 words 8,931 views 5.0 stars (5 votes)