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 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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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.
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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.
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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.
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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?
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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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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?
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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.
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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.
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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
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Build an Empire, From Scratch, in this Scratch Card Idle/Incremental game.
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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!
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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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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.
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Step into the shoes of a researcher in the depths of the antarctic and uncover the mysteries behind Project Hailstorm.
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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.
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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.
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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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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
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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.
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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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The tactical depth and iconic heroes of a hardcore MOBA meets the explosive verticality of a 5v5 3D shooter.
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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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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.
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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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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.
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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.
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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.
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Hey Lightcatchers! Are you ready for massive 60-player shootouts? Enjoy fast-paced hero shooter action in Farlight 84!
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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.
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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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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.
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It's either not for you or the best thing you ever played
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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.
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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.
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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.
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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.
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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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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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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?
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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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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.
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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.
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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.
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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.
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A top down twin stick zombie slaying shooter that you are sure to play again and again!
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The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.
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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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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.
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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!
