Top-Rated Free Sci-fi Games on Steam

158 free Sci-fi games with 500+ reviews and a 70%+ positive rating, newest first.

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Tyr - Players say: Pilot a customizable sci-fi tank in tactical team battles, using armor, concealment and vehicle-specific abilities to outplay rivals. Players like: Fair Free-to-Play · Distinct Tank Abilities · Tactical Team Battles ·
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Tyr is a multiplayer tank shooter. Pilot heavy-armored vehicles with unique capabilities and upgrade them as you battle for victory with your team.

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Sep 2, 2026
85% 👍
of 3.6k
Chrono CCG - Players say: Build a deck of evolving agents, trade card plays with rivals, and shift persistent timelines to reshape turn-based battles. Players like: Strategic Card Combat · Timeline Shifts · Agent Transformations ·
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Chrono CCG is an indie game from genre veterans where time-traveling agents battle for control of history. Timelines shift mid-match, agents evolve, and deep strategy meets accessible play. For the community, by the community.

Control, I'm Not Coming Back - Players say: After an accident strands a space cadet in the void, walk through shifting worlds, meet Voyager 1, and shape a branching story. Players like: Hopeful Story · Emotional Impact · No Reverse Movement ·
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Control, I'm Not Coming Back is a short and emotional narrative game about a lost astronaut searching for a reason to keep going forward while facing the emptiness of space. Inspired by the Hopecore aesthetic, it’s a story about positivism, friendship and our human connection with Voyager 1.

SHRAPNEL - Players say: In a storm-battered 2043, squad up in 4v4 battles to collect Sigma from meteor craters, raid rivals, and bank 300 units. Players like: Engaging Sigma Loop · Fast Match Pace · Team Tactics ·
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Shrapnel is a 4v4 objective FPS. Operators clash in a storm-ravaged impact zone to control Sigma—a volatile resource capable of reshaping humanity’s future.

SCP – Containment Breach - Players say: As a Class-D subject in a breached SCP facility, scavenge access items, evade anomalies, and manage blinking to escape. Players like: Unsettling Atmosphere · Blinking Under Threat · Community Bug Fixes ·
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A procedural first-person horror adventure. You are on your own after something goes terribly wrong in this top-secret containment facility. Collect items to aid in your escape and try to uncover the truth, as horror lurks behind every door. Can you make it out alive?

D1AL-ogue - Players say: Run an android repair clinic in a sunless cyberpunk city, solving circular match puzzles while listening to clients’ stories. Players like: Detailed Pixel Art · Circular Match Puzzles · Cyberpunk Atmosphere ·
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Become an android repair technician in a cyberpunk city where the sun never rises. Rotate the unique circular puzzle 'D1AL' and merge modules to fix their broken bodies and hearts. Your precise repair is the conversation starter. Turn the dial and listen to their stories.

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Feb 4, 2026
97% 👍
of 5.1k
Chronigma - Players say: As Cygnus, solve Sokoban-style puzzles by recording actions, rewinding time, and coordinating with your past self. Players like: Past-Self Time Loops · Clever Room Puzzles · Father-Son Story ·
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Master time in this time-bending sokoban-like puzzle game with a story. You travel back in time to be in two places at once, to solve puzzles impossible to complete alone. Your success hinges on your ability to collaborate with yourself. Can you learn to manipulate time to save humanity?

Girls' Frontline - Players say: Command firearm-inspired android squads in a war-torn future, planning map deployments and repositioning units during real-time battles. Players like: Dark, Expansive Story · Gameplay-Based Doll Crafting · Squad-Building Strategy ·
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As a Commander for Griffin & Kryuger PMC. Navigate faction power struggles, deploy forces strategically, and work to restore order in a war-torn world.

Z.A.T.O. // I Love the World and Everything In It - Players say: In a snowbound Soviet closed city, outcast Asya searches for missing classmate Ira and prepares a radio message to the universe. Players like: Emotional Writing · Atmospheric Art and Music · Relatable Asya ·
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USSR, 1986. A girl goes missing in the closed city of Vorkuta-5, yet not a soul seems to be concerned. Uncover the mystery behind her disappearance and transmit your signal to the universe.

Upload Labs - Players say: Build a node-based computer system to download, process, and upload files while researching, hacking, coding, and training AI. Players like: Addictive Progression · System Optimization · New Mechanics Unlock ·
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A sci-fi management game where you build and optimize your computer's system from the ground up. Connect and configure interconnected nodes to efficiently download, process, and upload files. Manage your setup, solve system challenges, and become the ultimate system architect

Scratch Inc. - Players say: Scratch cards for points, upgrade a growing grid, automate earnings, and prestige through successive tiers of an expanding empire. Players like: Layered Progression · Automation Unlocks · Satisfying Number Growth ·
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Build an Empire, From Scratch, in this Scratch Card Idle/Incremental game.

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Sep 17, 2025
91% 👍
of 2.2k
Galaxy Idle Clicker - Players say: Pilot a ship through enemy-filled space, gather resources and prisoners, then automate upgrades and reset for lasting bonuses. Players like: Layered Long-Term Progression · Useful Automation · Rewarding Prestige Resets ·
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Embark on an interstellar journey with Galaxy Idle Clicker! Conquer galaxies, upgrade your spaceship, and face off against a myriad of enemy ships. With engaging minigames, powerful upgrades, GIC delivers an unparalleled idle space adventure. Join the cosmic conquest today and dominate the universe!

FragPunk - Players say: In a 5v5 hero shooter, teams use Lancer abilities and round-changing Shard Cards in tactical bomb-defuse matches. Players like: Round-Changing Cards · Satisfying Gunplay · Distinctive Abilities ·
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FragPunk is a thrilling 5v5 hero shooter where Shard Cards allow you to break the rules of combat and ensure that no two rounds are ever the same. Get ready to unleash your skills!

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Mar 6, 2025
75% 👍
of 24k
Alpha League HD - Players say: Choose a hero, shape a roguelike skill build, then watch an auto-battler match against seven bots or players. Players like: Hero Build Combos · Relaxed Quick Matches · Tactical Build Choices ·
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Alpha League HD is a free-to-play, hero based Autobattler. In Alpha League, simply pick and build your favorite hero in a Roguelike fashion with 12 different combat genres, and then battle the other 7 Bots or Players to be the winner.

Project Hailstorm - Players say: As part of an Antarctic recovery team, explore an abandoned dig site, solve simple environmental puzzles, and investigate a buried mystery. Players like: Immersive Atmosphere · Striking Visuals · Effective Sound Design ·
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Step into the shoes of a researcher in the depths of the antarctic and uncover the mysteries behind Project Hailstorm.

GIRLS' FRONTLINE 2: EXILIUM - Players say: Lead a squad of Tactical Dolls through turn-based missions in contamination zones, using cover, terrain, and team abilities. Players like: Story and Lore · Detailed Character Models · Turn-Based Combat ·
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Continuing the legacy of the Girls' Frontline world, this all-new adventure casts you as the Commander, challenging you to lead your squad of Tactical Dolls deep into perilous contamination zones and overcome enemies with tactical prowess.

of the Devil - Players say: In 2086, defense attorney Morgan investigates murder cases, questions witnesses, and wagers evidence in trials under total surveillance. Players like: Writing and Characters · Cyberpunk Worldbuilding · Stylish Visuals and Music ·
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Immerse yourself in neon, smoke, and high-stakes legal gambles as a Defense Attorney with uniquely Killer insights in this episodic, diabolically stylish visual novel adventure game.

Toaster Arena - Players say: A fast-paced first-person arena shooter where customizable Protogens wall-run, wield odd weapons, and battle across varied modes. Players like: Fast Movement · Character Customization · Satisfying Gunplay ·
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Toaster Arena is a first person multiplayer arena shooter where players battle it out on different maps and game modes. Use Advanced movement to traverse obstacles and gain the advantage on the battlefield.

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Jan 20, 2025
91% 👍
of 787
Nicotine VS Fulanwang - Players say: As Ding Zhen in a surreal Litang County, choose how to confront Furong Wangyuan and uncover a strange power. Players like: Absurd Meme Humor · Surreal Story · Branching Endings ·
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brief introductionNicotine vs. Furong Wangyuan "is a brain pumping game that takes place in a fantasy world called" Litang County ". Players will play as" Ding Zhen ", defeat Furong Wangyuan, and gradually uncover the truth about their ability to manipulate the level of Sharp Cut 5

Saturn - Players say: As scientist Akim Kovalev, investigate a machine uprising on Earth and Saturn’s moons through timed exploration, choices, and combat. Players like: Sci-Fi Story · Atmospheric Visuals · Voice Acting ·
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Saturn is a tactical RPG set on the moons of Saturn and on Earth. The protagonist controls robots on the moons of Saturn and explores an underground city where one can find keys to the secrets of deep space.

Finn Dorset's Institute For Livestock Replication - Players say: Clone moon sheep, sell their wool, and upgrade an alien farm as its landscape changes in this incremental idler. Players like: Hand-Drawn Art · Changing Farm Visuals · Absurd Humor ·
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An animated incremental game about cloning livestock. Make as many moon sheep as you can. Research technology, upgrade your operation and become a clone farm billionaire!

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Oct 2, 2024
84% 👍
of 1.3k
Predecessor - Players say: Lead a hero in a 5v5 third-person MOBA, combining ability-driven fights, lane pushes, item builds, and terrain-based movement. Players like: Third-Person Combat · Distinct Hero Kits · Build Experimentation ·
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The tactical depth and iconic heroes of a hardcore MOBA meets the explosive verticality of a 5v5 3D shooter.

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Aug 20, 2024
71% 👍
of 17k
Super Sus - Players say: Crew members finish ship tasks and vote out suspected impostors as hidden killers sabotage the mission and neutral roles pursue goals. Players like: Varied Roles · Social Deduction · Fun With Friends ·
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Welcome to join the multiplayer social deduction game - Super Sus! Engage in intense gameplay with global players, as you strategize to safeguard your spaceship from the cunning Impostors determined to sabotage the mission and eliminate everyone aboard!

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Jul 30, 2024
71% 👍
of 3.0k
Astrometica: Prologue - Players say: Stranded in space, gather materials, craft survival gear, follow signals, and build a base to explore asteroid fields. Players like: Exploration With Purpose · Atmospheric Space Setting · Base Building ·
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Astrometica: Prologue is the free game about surviving in space. You need to use your skills and tools to stay alive. There are many challenges to face, and you need to fight to survive. You also need to build a new base in space.

Classic Marathon - Players say: As a security officer aboard an alien-attacked colony ship, fight through its decks, solve route puzzles, and uncover the story. Players like: Terminal-Based Story · Sci-Fi Atmosphere · Tactical Gunplay ·
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From the team that brought you Aleph One, the classic sci-fi FPS Marathon from Bungie on Mac revived for modern hardware by the fan community.

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May 10, 2024
91% 👍
of 1.3k
Meta-Ghost: Prologue - Players say: As a cybernetic fighter on a televised contest, battle machines in roguelite runs, upgrade weapons, and uncover a mystery. Players like: ·
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Immerse yourself in the reality show — "Breaking Show", where you engage in real-time battles with various intelligent machines using cybernetic enhancements and weapons. Whether for personal gain or lofty ideals. Fight! Until you reach the final victory on this Rogue-lite journey.

Gatekeeper: Infinity - Players say: Fight machine enemies across alien locations in a top-down roguelite shooter as you seek the stolen Heart of the Universe. Players like: Co-op With Friends · Distinctive Enemy Designs · Character Challenges ·
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Prologue version of the game Gatekeeper. Gatekeeper: Infinity is a fast-paced rogue-lite shooter where you'll search for the stolen Heart of the Universe and battle machine enemies! Play solo or join forces with friends in co-op mode.

Planet S - Players say: Colonize a procedurally generated solar system, supply growing cities, and pursue scientific or military power alone or with others. Players like: Absorbing Expansion · Playing With Friends · Multi-Planet Building ·
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Planet S is a real-time strategy game where your goal is to colonize multiple planets in a solar system to advance your civilization, build a city and supply it to grow your faction.

Farlight 84 - Players say: In a sci-fi battle royale, squads loot weapons, use hero abilities and tactical pets, and fight across vertical urban maps. Players like: Jetpack Mobility · Distinctive Vehicles · Casual Squad Play ·
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Hey Lightcatchers! Are you ready for massive 60-player shootouts? Enjoy fast-paced hero shooter action in Farlight 84!

Unnamed Space Idle - Players say: Pilot an upgradeable ship through alien fleets, matching weapons to enemies while layered idle systems grow its combat power. Players like: Interconnected Upgrade Systems · Strategic Build Optimization · Steady Unlocks and Progress ·
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Destroy endless waves of alien ships that have all but wiped out humanity in this long form, unfolding, sci-fi idle game. Customize your ship with different weapons and defenses to defeat specific enemy types and utilize a ton of different systems to increase your overall power.

South Scrimshaw, Part One - Players say: Follow a newborn Brillo whale through an alien ocean in a documentary-style visual novel with illustrated biology and field notes. Players like: Detailed Hand-Drawn Art · Imaginative Alien Biology · Documentary-Style Story ·
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South Scrimshaw is the story of a newborn whale in a vast alien ocean. It is a richly illustrated experimental visual novel, written in the style of a nature documentary.

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Jun 9, 2023
99% 👍
of 1.6k
Pixel Starships - Players say: Design a pixel-art starship, assign its crew and AI, then upgrade, explore, and battle other players in a persistent universe. Players like: Ship-Building Depth · Customizable Crew AI · Strategic Combat ·
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Pixel Starships is an FTL-style online sci-fi strategy builder and management game with a competitive PVP tournament. Set in the retro galaxy, your role is to explore space, meet aliens, and develop your ship, crew and AI. The game contains deep strategic and 4x elements. PSS is community-driven.

Omega Strikers - Players say: In 3v3 arena matches, choose an ability-wielding Striker, battle over the core, and score while knocking rivals away. Players like: Unique Sports Brawler · Fun With Friends · Striker Character Designs ·
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It's either not for you or the best thing you ever played

SCP: Observer - Players say: Trapped in a security room during a containment breach, monitor SCPs, ration emergency power, and seal doors to survive. Players like: SCP–FNAF Crossover · Tense Horror Atmosphere · Camera And Power Strategy ·
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SCP: Observer is a frightening experience in which you'll play the role of a maintenance engineer trapped inside a security room. Survive by managing the emergency power supply, monitoring the facility's camera system for threats and blocking the paths of oncoming horrors.

Limbus Company - Players say: As manager, lead twelve Sinners through a dystopian city, using turn-based tactics to pursue buried Golden Boughs. Players like: Story and Characters · Dystopian Worldbuilding · Memorable Soundtrack ·
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As the Executive Manager of Limbus Company, lead your group of twelve Sinners, venture into the buried facilities of Lobotomy Corporation, and lay claim on the Golden Boughs.

EMPTY SHELL: PROLOGUE - Players say: As a volunteer sent to a Japanese island facility, explore shifting corridors, scavenge gear, solve puzzles, and fight creatures. Players like: Industrial Horror Atmosphere · Randomized Replayable Runs · Tense Exploration ·
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EMPTY SHELL: PROLOGUE will throw you in a dark industrial environment, a secret facility on a japanese island. Each volunteer has signed a contract for a "recovery operation" without being privy to too many details. A tense roguelite survival horror with a top down perspective.

SCP: Labrat - Players say: After a containment breach traps you in an underground SCP facility, explore, evade anomalies, manage items, and search for an escape. Players like: VR Immersion and Fear · Co-op With Friends · SCP Atmosphere ·
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You are a test subject in the underground SCP research facility. When a containment breach occurs, you must find your way out. Escape the SCPs, discover anomalous objects, and collect valuable resources along the way.

Chicken Invaders Universe - Players say: Join humanity's fight against vengeful space chickens in a top-down shooter of missions, ship upgrades, and galactic exploration. Players like: Childhood Nostalgia · Classic Shooting · Silly Chicken Humor ·
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A deliciously addictive core of finger-blistering shooting action, surrounded by delectable morsels of galactic exploration, spacecraft customization, and community competitions.

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Dec 15, 2022
91% 👍
of 3.8k
Galaxy Life - Players say: Build a colony of tiny aliens, train troops, defend your base, and battle rivals as you expand across a persistent galaxy. Players like: Childhood Nostalgia · Colony Building · Simple Strategy ·
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The universe is full of Starlings, tiny orange aliens that want to take over the galaxy. Create your own space colony, fight epic battles and discover new planets. Train your soldiers, develop your technology and create unimaginable gadgets. Enjoy this huge social game with friends!

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Aug 31, 2022
92% 👍
of 8.6k
Half-Earth Socialism - Players say: As humanity’s global planner from 2023, choose policies and projects to balance climate, resources, food, and political support. Players like: Thought-Provoking Ideas · Challenging Strategy · Engaging Resource Planning ·
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Try your hand as a global planner of a future society. Play with a wide range of technologies and policies spanning different fields and ideologies. Will you lead the world to ecological utopia or planetary ruin?

Alien Removal Division - Players say: As the sole survivor of a 1950s facility invasion, wall-run, dash, and shoot your way through alien-filled halls. Players like: Parkour Movement · Fun Alien Shooting · Smooth Controls ·
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The invasion has started and the secret military research facility has fallen leaving only chaos. As the only survivor, you must fight your way through the military base against a horde of frantic aliens. A.R.D. is a FREE single-player first-person shooter made by students from Breda University.

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Jun 17, 2022
89% 👍
of 1.1k
Trimps - Players say: On a hostile planet, manage a growing population of Trimps by gathering resources, fighting, upgrading, and automating their work. Players like: Deep Progression · Flexible Automation · Strategic Choices ·
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A text-based incremental idle game with a ridiculous amount of unique content. Automate old stuff as you unlock new stuff to keep things interesting for hours and hours, no spam clicking necessary! Trimps is everything you love about your favorite games, distilled to their purest form.

Prosperous Universe - Players say: Run a spacefaring company by choosing planetary bases, building production chains, moving cargo, and trading in a player-run economy. Players like: Economic Simulation Depth · Supply Chain Planning · Player-Driven Markets ·
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In Prosperous Universe start your galactic empire by trading on the real-time market exchange with other real players. Build your 1st base from humble beginnings & watch as your business flourishes with complex supply chain strategies. Economics, politics & realism fuel this immersive business MMO.

Blind Fate: Edo no Yami — Dojo - Players say: As blind cyber-samurai Yami, sense a machine-filled Edo through damaged sensors and fight robots with a katana and finishers. Players like: Challenging Combat · Cyber-Edo Atmosphere · Sensor-Based Awareness ·
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Dive into a world that mixes Sci-Fi and ancient tradition. Slash through robots with a trusty katana, use hi-tech implants to navigate the surroundings, dodge enemy attacks, and land devastating finishers. Reclaim the past following the way of the Japanese samurai in the fantastic period of New Edo.

The Timeless Child - Prologue - Players say: Two players explore Wells Manor in different eras, sharing clues and solving puzzles as Emily’s past changes Chris’s present. Players like: Time-Split Co-op · Teamwork Puzzles · Challenging Riddles ·
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The Timeless Child is a 2-player puzzle-adventure coop game with first-person view. Embark on a journey, through time and space, to save Emily Wells from her endless temporal jail.

I MAED A GAM3 W1TH Z0MB1ES 1N IT!!!1 - Players say: A top-down twin-stick arcade shooter where you dodge enemy waves, grab weapon drops, and survive a run set to one song. Players like: Catchy Soundtrack · Xbox 360 Nostalgia · Quick Arcade Action ·
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A top down twin stick zombie slaying shooter that you are sure to play again and again!

Cell to Singularity - Evolution Never Ends - Players say: Tap to earn resources, evolve life from single cells into civilization, and unlock dinosaur, space, and rotating science simulations. Players like: Science Learning · Evolution Themes · Idle Progression ·
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The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.

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Nov 3, 2021
89% 👍
of 28k
Crab Game - Players say: Compete in first-person playground-style minigames, using movement and physics to outlast up to 34 other players. Players like: Funny With Friends · Chaotic Minigames · Proximity Voice Chat ·
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Crab Game is a First-Person Multiplayer game where you play through several different minigames based on children's games, until only one player stands victorious.

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Oct 29, 2021
91% 👍
of 150k
Lemnis Gate - Players say: A turn-based FPS where you control deep-space operatives across five 25-second rounds, planning around actions from earlier turns. Players like: Original Time-Loop Concept ·
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Lemnis Gate is the revolutionary turn-based combat strategy FPS taking place in a time loop. Master the unique abilities of powerful deep-space operatives and compete in mind-bending four-dimensional battles.

Swing Dunk - Players say: Ride a hoverboard into multiplayer basketball, swinging the ball to build momentum for passes, shots, and slam dunks. Players like: Distinctive Movement ·
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Swing Dunk delivers a stunning combination of fast-paced basketball and a stylish hoverboarding experience. With intuitive physics and a high level of freedom in controls, create your own unique basketball moves. Train your skills and SWING your way to victory!