Free Sci Fi Games

Free 2D/3D Offline Adult Games.

Colony City 27λ New Final Version 1.1.0 Full Game Bunny Eats Tiger

Colony City 27λ is an adult Rougelite game that combines simple card and complax skill set. In the story, there are plenty of challenging malevolent criminals, tentacle creatures, and mechanical enemies. Your battle performance during the adventure will determine the final ending!
Hunter Space Pirates Version 0.1.4 Mr.Mister

At the tender age of three, our protagonist is separated from his mother under mysterious circumstances. A compassionate couple of neighbors, mourning the loss of their own son, adopt him. His foster father, a former Navy combat pilot known as “Viper,” nurtures his passion for airplanes. However, tragedy strikes when the couple is killed by a hungry Grizzly bear. Now, on the cusp of adolescence, the boy is sent to a foster home where he must navigate life surrounded by four women. His journey to discover his true self is accompanied by a series of encounters with the girls at his foster home, each interaction shaping his understanding of relationships and desire.
Stellar Incognita New Version 0.9.5 Slamjax Games

Stellar Incognita is a sci-fi visual novel with multiple branching paths and endings, built around the central themes of mind control and corruption.
The year is 3922 and humanity is colonizing the vast reaches of a wild and unknown space, known as the STELLAR INCOGNITA. You play the role of Sagacious-6, a nefarious and opportunistic clone worker that researches forbidden technologies for mind manipulation and corruption, in order to seek a life of indulgence and self-satisfaction. Set on a mission of revenge at the outset of the story, what fate awaits Sagacious-6 in the STELLAR INCOGNITA?
The Necromancer Arises New Version 0.05b Whiteleaf Studio

The story follows a powerless protagonist who, one day, discovers a mysterious book in his front yard.
Little did he know, this book would awaken his latent hunter skills, turning him into a force to be reckoned with.
Living with his mother, sister, and a recently summoned zombie (thanks to his newfound abilities),
he joins the prestigious Hunter’s Academy.
There, he’ll face thrilling challenges, make new friends and enemies, and experience love and romance like never before.
But it won’t be easy, as he’ll have to fight his way through dangerous gates that threaten the very fabric of reality.
Think of it like Solo Leveling, but with a twist of romance and a whole lot more excitement!
Hotime Saga Version 0.1 AdultPlay

Hotime Saga is a fully animated, open-world novel and dating sim where androids handle politics while humans serve as the labor force.
Experience dating/fucking fascinating characters in this futuristic world, including both women and androids. Inspired by Summertime Saga and other popular games in the genre, Hotime Saga aims to bring something new for the players.
We hope you enjoy your time!
The Last Star Walker Version 0.1 Veluxa

In the vast cosmos, two realms stand out: Navā, a mystical world where magic flows freely, and Terra,
a technological marvel at the peak of innovation. Both face exploitation by power-hungry elites.
As the boundaries between Navā and Terra begin to blur, a critical question arises:
What happens when these worlds collide?
Will you side with the Extinctionists, who believe one world must dominate the other, or the Expansionists,
who seek a harmonious fusion of magic and technology?
Or will you forge your own path, bridging the divide between duty and desire, love and vengeance?
The fate of humanity rests in your hands.
Stellar Dream New Version 0.55 Winterlook

Stellar Dream tells a story about a colony ship set to find new worlds suitable for human colonization.
Scouts were send to three most suitable candidates but communication with them has been lost.
The player’s task is to bring the scouts home,
find a suitable home for the colony and establish diplomatic relations with alien life forms.
Simbro ResErection New Version 0.10c The Gentle Viking

Welcome to a sci-fi/cyberpunk universe where you run an adult brothel in a full brothel management simulator. Build your brothel from the ground up by adding new rooms to increase your staff capacity, keep staff happy, and provide unique services to clients. You can also customize your characters with different clothes, hairstyles, and weapons. In this game, you can earn experience points and a reputation through a turn-based combat system, running your brothel, and “interacting” with beautiful women. Level up your character and staff to better serve clients or fight off thugs. Take over the city by fighting gangs and upgrading your brothel.
Behind the Doom New Version 0.8 UnrulyAction

Behind the Doom is a comic-based parody adult visual novel with Doom as the protagonist.
He’s up to his old tricks of attempting rule a world that is threatened and repulsed by Latveria’s free use society.
While the A plot revolves around Doom attempting to corrupt Sue and show her the more sexually open ways of Latveria other heroines are planned to appear with Wanda already taking a quite prominent role.
Through each heroine that comes under Doom’s control he become ever closer to global dommination.
Sexbot Restoration 2124 New Version 0.8.0 squirrel24

You were a geeky kid and spent most of your time tinkering with broken down sexbots instead of studying in school. Since you never studied you never graduated from high school. Your parents were fed up and kicked you out when you turned 18. At least they gave you a little money.
You decided to use the money they gave you to buy tools and rent space in an old warehouse and try to start a business repairing sexbots. Unfortunately you learned that starting a business is difficult. You’ve been living in the warehouse where your shop is located and struggling to make ends meet for almost a year. Maybe if you’d studied at school you’d have a better chance of making this work!
‘Sexbot Restoration 2124’ (SR24) is a variant of ‘Defective Sexbot Chop Shop’ (DSCS) by Radnor.
Projekt Passion Season 2 New Version 0.12 Classy Lemon

Earth has long since been abandoned, and what remains of humanity is now spread out across the galaxy. So what happened at Earth? That part of history has long since been lost to obscurity.
But what do you care? You have your own problems to deal with.
You’ve just survived an assassination attempt at the cost of your apartment. Sounds like any other day of the week, right? Right, only this time your partner has mysteriously vanished as well, and it’s your duty to find out where she went! Word of warning: the answer may lead to… bigger adventures than you’d planned for. Better pack an extra lunch.
Maisa Galactic Bounty Hunter Version Demo v1 DarkSexualArtz

Maisa is a bounty hunter who lives in the eastern part of the Milky Way galaxy. She receives mission requests from the galactic police and gets rewarded with money for doing the job. Maisa wears skimpy outfits during her missions because aliens can easily detect fabric and clothes, but it is hard for aliens to detect the human skin unless the human gets very close to them!
Exilium Breeding Empire New Version 0.1.7 Nocturnal Illusions

Exilium – Breeding Empire is an adult NSFW game that blends the strategic depth of worker placement and base building mechanics with the thrilling challenge of survival in a setting filled with mystery and danger. Set against the backdrop of a foreboding alien world, players must navigate the complexities of managing resources, enhancing their base, and assigning tasks to a diverse group of survivors. Each decision impacts not only the survival of the colony but also its ability to thrive amidst the unknown.
Masters of Raana New Version 0.8.3.4 T4+ GrimDark

You begin the game as a nobody trying to start up a new life in Ikaanos after inheriting a house from your older brother.
The city of Ikaanos is an abandoned colony on the densely forested planet of Raana. After a sudden separation from Earth, Ikaanos became a cauldron of despair and violence that forced almost half of its human population into slavery.
Today, two brutal centuries later, feudal-like kingdoms fight among themselves over power and influence, when they’re not busy dealing with the planet’s dangerous megafauna.
Cybernetic Seduction New Episode 5 Part 1 1Thousand

A thrilling story where highly-skilled agents enter the simulation to pull off a grand scam. Your Target? Hector Zhine.
Make connections in the New Zhine City to infiltrate his criminal empire. As a Cock – an agent whose sole responsibility is to seduce women around the Target – you have the ability to penetrate Zhine’s inner circle. With each member demanding a distinct approach, seduction alone won’t get the job done. Be trustworthy, reliable, resourceful to charm your way into Zhine’s family hearts. Convince his assistant and his employees that you are the answer to all their needs and desires.
The closer you get to the top, the more dangerous the mission becomes, as the simulation’s alerted security system always watches.
Good luck, Agent!
It’s Just A Game New Version 0.3.2 DigiDec

Will you struggle to maintain control over yourself and your identity, or will you succumb to temptation as your life blends with fiction? If perception is reality, are there any objective truths?
How To Fix The Future Chapter 1 New Version 0.3.2 mr.moonmi

A young man lives an ordinary life. Working as a simple salesman, he escapes reality by playing video games at night. Life hasn’t been fair to him, but everything changes when people around the world start getting mysterious game disks. And when two agents from the future show up, he suddenly becomes involved in the most incredible adventure of his life.
Discover the secrets of time. Meet beautiful girls on your journey. And make decisions that will change the flow of time.
This is a story oriented sci-fi adventure novel. Where events will take place both in our time and in the near future.
SlutCraft Heat of the Sperm New Version 0.42 Shadow Portal

It seems like Sarah Kerrigan was a loyal member of Sons of Korhal and obeyed Arcturus Mengsk’s orders to every syllable just yesterday. But who would’ve thought that Mengsk didn’t forgive Sarah for killing his father.
Because of his plots and betrayal, a secret operation on Tarsonis, the capital of the Confederation, turned into a bloodbath and a ‘captive’ status for Sarah herself, but as she found out later, it was just another hard way to promising new opportunities. Opportunities to become stronger. To get revenge. To get some pleasure…
This is a story about Sarah Kerrigan’s path from a loyal soldier to a powerful (and sexy) Queen of Blades.
Life on Mars Chapter 1 New Version 0.6 MiZtyl

At the end of the 24th century, humans succeeded in terraforming Venus and Mars. But just a few decades later, a war broke out when the colonists wanted to gain independence. The War ended in the middle of the 25th century with a peace treaty to end the Solar Federation as well as the sovereignty of Earth. The story begins at the start of the 26th century on Earth. It’s also the 1st century of the new calendar on Mars. The Martians are trying to distinguish themselves from Earth. Our main protagonist is a senator’s assistant. His boss is running for Chancellor this year. One of her promises is to end the legal status of polygamy and polyandry. But what about the main protagonist? Is he also against polygamy and polyandry? His decisions will shape the story of Life on Mars.
FemCity New Version 0.6.0 Kiriowo

In this game you play as a man, who stuck in the city where males are discriminated while females rule everything in this dark cyberpunk future.
Will you able to survive and more of that, manage to escape from the FemCity?
Deep Vault 69 New Version 0.3.9a bohohon

Howdy, pardner! Might I say, you’re looking fit as a fiddle!
And this is not surprising, because you are one of the survivors in a comfortable vault!
But it’s time to get to the surface to explore the world. Well, or try to do it.
Cyan Brain New Version 8.1 Demo NEKOUJI STUDIO

Cyan Brain is a sci-fi horror game where players run and are pursued, by futa monsters and more….
Portal Trials Virtus Ascent Version 0.1 Seeidont

During the Fourth Great World War between Humanity and AI, the machines won,
pushing humanity to the brink of extinction.
In a last-ditch effort to recover and repopulate, a surviving faction of human scientists and engineers,
now extinct, used their scrambled-together technology to create a hidden, rogue AI.
At regular intervals, this AI transports four individuals to a new world through the Portal Trials.
These trials consist of six game-like floors, each testing a different virtue:
Wisdom and Knowledge, Courage, Humanity, Justice, Temperance, and Transcendence.
Will you pass the trials and restore humanity, or will you fall and be forgotten?
Selara Update 7 Added Android Port Sacred Sage

The main story takes place eighty years after leaving Earth when you wake up from cryostasis in the middle of a mutiny. You are the new Commander of a ship called The Herald. As the story progress it will be up to you to save humanity while also earning the trust of your crew members. Your inner circle consists of an A.I. your squad leader and team leader, a medical scientist, and a mechanic/engineer. As the story progress you realize that a mutiny is the least of your worries. Your food and water supply is damaged and needs to be repaired. While the human population is also dwindling. It’s up to you to navigate and lead your remaining people to prosperity.
The Pilgrimage New Final Version 2.10 Full Game Messman

Between her adventures with famous commander Tali Zorah went to her pilgrimage to help quarian Flotilla. What can goes wrong? Seems like everything.
Worlds of Wonders New Version 0.2.20 It#8217s Danny

In Worlds of Wonders you take over the role of the Main Character, a 19 year old man (other genders are work in progress) who is about to go to college, when some sudden events flip his life upside down. You are drawn into not just one, but multiple worlds full of magic and futuristic technology. Discover secrets, encounter new characters, human and non-human, and work yourself to the top of the world(s). But be careful, the forces of ancient magic and modern technology are about to unleash a war, a war that will put all worlds in danger. Will you choose one side or will you stay neutral?
EXXXOLIFE Version 0.4.0.3 EXXXOLIFE

ExXxOLIFE – single-player platformer-survival game for adults.
Year of 3152., Andromeda nebula, a cosmic anomaly of unknown type.
Oppai Odyssey New Version 0.4.4B Cryoxxx

You are the captain of spaceship and your crew is a bunch of cute girls. Explore your spaceship and build friendships and intimacy with your crew much like games such as “Mass Effect” and “Knights of the Old Republic.” Your mission is to explore and survey uncharted planets and experience the unique races and environments. Especially the cute girls. Oppai Odyssey includes completely animated scenes and sexy situations.
Haremwatch Juno Has Landed Final Version 1.0 Full Game Gachapen Games

The young Space Traveler from Mars lands on Earth and onto your heart in this short story.
This is a standalone build to introduce an upcoming character to the main Haremwatch build. Available in browser, and for windows, android, and mac.
Shelly’s Future Past New Episode 2.2 SexyShelly

Shelly’s Future Past is a Sci Fi Erotic Lesbian Time Travel Adventure, about a female protagonist 23 year old lesbian woman, who lives in the year 3077 within Cyber City with her best friend Triss
Shelly, who, has lived a emotional rollercoaster life, is special in way that will come to light in this visual novel
A Mystery Lady from the future, that knows Shelly very well, travels back in time to find Shelly and asks her for her help to stop the end of the world from 5 very powerful men in the future that have taken control of the Earth
Shelly thinks she is travelling back in time to change the past to save the future, but, will quickly find out she is actually needs to correct the time line
Shelly is asked to travel back in time, to five very different time lines, to find 5 straight woman, one on each time line and find a way to stop them from ever getting pregnant, no one knows who their children’s father is, but Shelly needs to stop each woman from getting pregnant which will stop 5 powerful men own great grand parents from ever being born, resulting in them never being born, this will then will save the future and end the war
But it won’t be easy, as one of the powerful men is also travelling back in time.
Light-Space Love Version 0.46 Added Android Port Halftilt

The game takes place in the year 8643. You play as Captain Linessa Star,
Commander of Repopulation Colony: Deep Six Nine.
Deep Six Nine is one colony in the galaxy among many that were founded by the Federation.
The Federation is responsible for assisting Xeno species that are in danger of extinction by helping them reproduce.
The Federation achieves this goal by utilizing genetic technology that allows members of the Federation,
to get impregnated by (or to impregnate) members of different species.
As Captain of Deep Six Nine, it is your duty to form bonds with other Xeno species,
and recruit their people into your colony to take part in its breeding efforts.
The story takes place after an incident that occurred with Captain Linessa Star in which she,
had unexpectedly returned from a year-long relationship-building mission with much of her memories erased.
Unsure of what happened to her, she wishes to discover who she is,
what happened to her, and how she can rebuild her colony which has fallen into disarray in her absence.
You will unlock different worlds to explore within the galaxy to visit in order to recruit Xenos,
into your colony and to uncover the mystery behind her lost memories.
GIRLDIVERS Demo Version 2.0 Sweet Cakes Games

Join the GIRLDIVERS, humanity’s last line of offense against an overwhelming alien menace. Command sexy girl soldiers in a rich campaign full of randomly generated challenges, unforgiving enemies, sci-fi gadgets, and heavy firepower. Engaging in lewd punishments and rewards along the way.