Free Sci Fi Games

Free 2D/3D Offline Adult Games.

Navigating The Rift Version 0.5 Added Android Port TrippyDippity

Planning to propose to your girlfriend of 5 years, the two of you take a romantic tour of the galaxy only for disaster to strike. Saved at the last moment, you are left isolated on a huge research vessel in a forgotten corner of space. Your rescuer – an amoral man gone insane from prolonged isolation – will stop at nothing to drag your girlfriend into a sexual relationship.
NTR is not avoidable.
Arvale Protocol Version 0.2.1 SurvivalMyths

Home to around 8.5 billion citizens, Arvale City has become the number one living spot for the entirety of the world’s population. Surrounding the city, are the walls that shield people away from the outside world. Each and every citizen have been chipped at birth, all of which being special devices handcrafted by a high-rise corporation, otherwise known as “A.V.A.” These devices are called, “B.D’s.” While having a super computer implanted into your brain might seem like a cool idea, having a government tracking device will prove to be a lot more problematic than one might think.
The Loving Son New Version 0.8 17MOONKEYS

This is a short visual novel in a science fiction setting.
Big Brother In Space New Version 0.10.0 Lewd Fiction Games

A new take on the ‘Big Brother’ game.
You’re stranded in space with your ship’s hyperdrive damaged until you reach a space station of the Federation.
Being the first humans who made contact with the Federation, you’re assigned to your own section of the station and two of you (Ann and Lisa) are found to be useful by the station administration and are given jobs.
The other two (Alice and you) are classified as drones,
so you’re not allowed to leave your section until the administrator decides otherwise.
The other surviving crew member Kira is going under medical examination because of a parasite detected in her stasis pod.
Sex Universe Final Version Full Game Octo Games

Welcome to Sex Universe [18+], a space clicker game that intertwines sexuality, adventure, and modern technology in an immersive space streaming simulation.
This is a clicker game.
Shards of Her New Version 0.3.6 Soul Persona

Hundreds of years ago, Michael, a demi-god with a heart full of love,
experienced the profound loss of his beloved.
She disappeared, leaving no trace behind.
Whether she perished or merely vanished remains a mystery.
Despite his tireless search, she remained elusive.
Eventually, he resigned himself to her absence, though he held her dear in his heart.
Stranded in Space New Version Day 19 WildMan Games

You wake up on a spaceship filled only with women travelling to another planet, unaware of how you got there.
You must navigate your days aboard the Endurance, making key decisions about your relationships with your shipmates,
while trying to figure out the larger mysteries at play involving your reason for being on the ship,
and why its destination to the sanctuary planet of Elysium isn’t going according to plan.
You are Stranded in Space!
Haremwatch Version 0.02A GachapenGames

In the present day, you find yourself taking part in a sketchy science experiment. Eventually you awaken in the future… the future of the Overwatch universe! A lot has changed in the past 60 years, notably… well, play the game to find out! You can be sure that this adventure will lead to a great time and LOTS of lewd fun!
VoidBound New Version 0.6d Steam EA Cursed-Atelier

The Earth is sucked into a war between alien species, and the heroine has to venture to worlds never before seen by mankind to find a way to stop it. The game is a sci-fi ero RPG with a focus on variety in combat mechanics. The character’s abilities will be determined by a wide variety of equipable weapons, psi amps, and support gear, and each combat area will have its own unique spin on battles.
BOOBIES Version 0.3b Lascavia Studio

You play as a guy that has the power to save heroines/girls from different parts in the multiverse after the destruction of their universe.
You will provide homes to them in your base called zone zero.
You identify them as BIOLOGICAL OTHERWORLD ORGANISM BEINGS IN EXILE.
B.O.O.B.I.E.S for short.
Take good care of them and eventually, they’ll be a part of your loyal harem!
Goth Mommy AI New Version 0.3 Dark Imagination Games

The year is 2032 and the AI singularity has come and passed. Many disruptions to society have occurred, but a product called the Goth Mommy AI has permeated the personal companion market.
Add new members to your party and watch ridiculous events unfold as you play through the story mode. Keep the action going in gauntlet mode where you can choose your path and fight til death.
Inura New Version 0.712 ProInu

Main character got sent to an alien world. Where she struggles for survival.
Secrets of the Wasteland New Version 0.1.2.0 River#8217s End

River's End is a real-time mature 3D RPG game in which you take on the role of a lonesome wanderer new to the region.
You, a person with a murky past trying to make it in the harsh and desolate Mojave Desert wake up in a bar called River’s End dizzy and clueless as to how you ended up there. The bartender requests that you check in on an old friend however while exploring the area, you come across settlements and tribes, all with the same goal, to avoid slavery and to survive the wasteland and its dangerous inhabitants.
The Mojave is infamous for its lucrative slave trade, and raider tribes extorting supplies from settlements; after all, it’s a man eat man world out here.
The past isn’t important now, the future is, what will you be remembered for, and how will you survive? That is a question only time will answer. But one thing is certain: it’s a man eat man world out there, and you haven’t eaten for days.
Lily II Masterplan Version 0.03 Beta Added Android Port Joker 3D

The story of Lily is continued in Lily II: Masterplan. Now Lily can no longer lean on Kharoline, she teams up with Karen Campbell to get control over InterBio and at the same time stay out of the hands of Ilja Slavic.
In Lily II: Masterplan the player gets to decide the sexual escapades Lily gets involved in. You need Lily to enjoy sex to progress the game, but choose with who. It can be a full lesbian game if you want it to be, or you can avoid lesbian sex all together.
8 Days with the Diva New Final Version 1.1.0 Full Game Slamjax Games

It is the 2070s and you take on the role of Snake Siemen, an up-and-coming operative of the evil organization ‘Talon’. Your boss Doomfist has faith in your abilities and you’re not about to let him down. As part of a promotion into the ranks of the most elite agents of Talon, you are given a test – the world-famous gamer girl, live streamer, movie actress and elite combat pilot D.Va has just been made a prisoner! You have 8 days to train D.Va and turn her into a Talon asset in any way you see fit! But with other elite Talon agents ready to interfere with your plans, things could get very complicated, very quickly!
Lust Survivor New Version 0.7 Moccasin#8217s Mirror

Seven girls crashland on an uninhabited planet after an accident, they will have to survive until help arrives and learn how to deal with each other. Hours ago the girls were just students from different careers on route to a far away research site for different reasons. Some girls know each other but nobody was remotely prepared for the situation. The group needs to start getting along and doing something if they want to get rescued or at least survive.
Sombionic New Version 0.2 Sombionic

Shoot monsters and romance them during combat! In Sombionic you play as a female scientist fighting monsters and genetically engineered humans, harvesting their rare genes and organs for your own inventory. Once pristine habitats are now overrun by genetically enhanced species, their presence transforming these landscapes into biopunk arenas of rivalry.
Callisto-X New Version 0.78 ProfessorX-10

Callisto-X is a new unofficial fan game based on Callisto by Xavster_Gaming
Solidly based on the original but with new challenges, enhancements and story changes.
Once again you play the role of a former military officer, now trying to make a living by trading and scavenging in the vastness of space.
Your ship is the Callisto, your crew a group of exotic & talented women from across the Galaxy who will intimately aid you in your quest.
Will you save the Galaxy? Or will you DIE in the attempt? Will you be a Hero? …or just another dead body floating in space?
Once A Porn A Time New Chapter 2 New Final Version 0.13 Full Game Salty01

A Trainer game in a FairyTale World.
You end up on an abandoned planet and deliver a fairy in a jar (?) Does magic exist? No, but what you’ re about to get is even better than that! Sex, I’m talking about sex. Sex with princesses… and other things.
Paracosmic Reality New Version 1.7.0p Prologue Jiggly Stone Studios

Waking up one day to find a mysterious letter in your mail, you find that you’ve been given some property!
Little did you know this new home would change your entire world!
Unravel the mystery of why you were given this property and the implications of owning it!
All while being joined by a bunch of cuties along the way!
X-Trek III Ménage à Troi Final Version 1.0 Full Game Xia Liu Bei

Like Star Trek? Did you enjoy X-Trek: A Night with Troi, and X-Trek II: A Night with Crusher? If so, join us for this third installment, where our lowly lieutenant will prove once and for all that three’s cumpany, er, company.
DEEP BRAIN Final Version Full Game GPOINT GAME

DEEP BRAIN is an adventure game featuring a female protagonist named “Nana”. Players take on the role of Nana as they search for clues in a mysterious laboratory, navigate through its complex structure, and uncover the secrets behind the world’s drastic changes in order to find a way to escape. The laboratory is teeming with malevolent monsters who have their eyes set on Nana, and making careless decisions could lead to her being violated without mercy.
Tentacles Invasion Final Version Full Game Koguma Project

On the way back to Earth, the space freighter Nostromo 2 encounters an emergency, and crew member Veronica Wenger is awakened from cryosleep. The ship is infested with mysterious creatures, and there is no communication with the other 9 crew members. In response to the computer “HOLLY9000,” Veronica embarks on a mission to save her fellow crewmates.
The Lord of Time Version 1.0 IndianaTK

Welcome to the Milky Way.
You play as a member of the renowned Zenti cult, a space and time travelling cult so powerful that the mention of their names turns armies around.
You awaken in a new galaxy inside your type 50 time ship and must venture out in to the known galaxy to establish a new foundation for your civilisation’s new creation. Along your journey you encounter the young Liu Cheng and bring her into your ship as your companion on your adventures.
Travel through space and time and restore the cult to it’s original glory.
Fucking My Father Theatrical Cut New Final Version Part 2 Full Game OhWee RustyV

A tongue in cheek, unauthorized parody of DMD, with nods to a few other games in this Genre, from the silly minds of RustyV and OhWee…
This game follows the stories of three 18 year old girls, as they discover their sexuality. One shall eventually meet her father for the first time, and her two BFFs will join her on this journey of discovery, perhaps discovering a few things of their own along the way…
Note: FmF is short for Fucking my Father.
FmF Stories BFF Tales Book One OhWee RustyV

FmF Stories: BFF Tales [Book One].
Prepare Uranus Exploring Black Holes for Adults New Version 0.925 Alienguy

Adanot plans to open his own business after a bill is passed, legalizing the entertainment industry in the Milky Way. He sends out Tsir to find out the cost of obtaining a license to open a bar.
Project Dollscapes New Version 0.2.4 dollscapes

Dollscapes project featuring creatures from fantasy and cyberpunk worlds.
The development process will focus on creating a lifelike experience, where characters feel alive, express emotions, remember all player actions, and react to the smallest events.
VR is NOT required to play this game.
The Last Star Walker New Chapter 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.
City of Broken Dreamers New Final Chapter 15 Version 1.15.0 Full Game PhillyGames

Info:
Los Angeles, 2042
A city ruled by corporations.
A city ruled by the elite.
A city that exemplifies the best and worst of the American Dream.
Millions live their lives in almost blissful ignorance of the excesses of the rich, or the degradation of the poor. Executives hold more power than politicians, the police hold less power than corporate mercenaries.
You are one of those mercenaries, one of the best, and elite tier called Ghosts… but you haven’t taken a job in months. That is about to change.
Elsewhere in the city, a young girl is about to become the center of a conflict that could tear the city apart.
As you track her down you’ll have allies and enemies, others like you who have been used by the city and spit out. Who will you trust? Who can you afford to?
Each of them has their own dreams, their own motivations, each is broken in their own way. All of it will come together…
In the City of Broken Dreamers
Color of My Sound New Chapter 3A Version v6 Gallant Trombe

Info:
Color of My Sound is a Sci-Fi, Espionage, Drama, Erotic visual novel set in an original setting. It is a universe chock full of potential for character drama, conspiracies, espionage, intrigue and action.
The story began when a rebellion on an unprecedented scale erupted across the Empire’s worlds and humanity faces an uncertain future for the first time since the Empire’s inception. The infamous day has abruptly altered the lives of many, including our protagonist.
Follow the story of the Officer, as he carefully manoeuvres around the machinations of various powers of the Empire, each vying for his allegiance or death…
As the commanding officer of Special Operations Squad “Nu”, form camaraderie, rivalry, and even romance with your team members. Careful, each member has their own hidden agendas and personal stake. Pay careful attention, trust no one, you will need to earn the loyalty, perhaps even love of each member to survive this journey.
Project EVE Version 2.0 HexErotica

Take on the role of Evette Flores “Eve” as she navigates through a series of unexpected events. What fate awaits her?