Top-Rated Free Sci-fi Games on Steam
155 free Sci-fi games with 500+ reviews and a 70%+ positive rating, newest first.
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Chrono CCG - 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.
Jun 23, 2026
Control, I'm Not Coming Back - 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.
May 29, 2026
SCP – Containment Breach - 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?
Feb 20, 2026
D1AL-ogue - 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.
Feb 4, 2026
Chronigma - 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?
Nov 25, 2025
Girls' Frontline - As a Commander for Griffin & Kryuger PMC. Navigate faction power struggles, deploy forces strategically, and work to restore order in a war-torn world.
Nov 18, 2025
Z.A.T.O. // I Love the World and Everything In It - 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.
Nov 10, 2025
Upload Labs - 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
Oct 3, 2025
Scratch Inc. - Build an Empire, From Scratch, in this Scratch Card Idle/Incremental game.
Sep 17, 2025
Galaxy Idle Clicker - 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!
Aug 6, 2025
FragPunk - 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!
Mar 6, 2025
Alpha League HD - 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.
Feb 14, 2025
Project Hailstorm - Step into the shoes of a researcher in the depths of the antarctic and uncover the mysteries behind Project Hailstorm.
Feb 10, 2025
of the Devil - 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.
Feb 6, 2025
Toaster Arena - 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.
Jan 20, 2025
Nicotine VS Fulanwang - 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
Dec 31, 2024
Saturn - 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.
Nov 15, 2024
Finn Dorset's Institute For Livestock Replication - 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!
Oct 2, 2024
Predecessor - The tactical depth and iconic heroes of a hardcore MOBA meets the explosive verticality of a 5v5 3D shooter.
Aug 20, 2024
Super Sus - 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!
Jul 30, 2024
Ocean World: Eden Crafters Prologue - Survive, craft, and automate in this free prologue set on one of the planets you can transform in Eden Crafters, an open-world game where you play solo or with friends to turn a hostile planet into a habitable haven for humanity.
Jun 24, 2024
Astrometica: Prologue - 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.
May 22, 2024
Classic Marathon - 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.
May 10, 2024
Meta-Ghost: Prologue - 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.
Feb 28, 2024
Sputnika Game - A Cosmic twist on a Suika-style game with space gravity. Help our little friend Sputnik on his journey to become the Sun.
Feb 11, 2024
Gatekeeper: Infinity - 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.
Nov 10, 2023
Planet S - 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.
Oct 28, 2023
Farlight 84 - Hey Lightcatchers! Are you ready for massive 60-player shootouts? Enjoy fast-paced hero shooter action in Farlight 84!
Sep 21, 2023
Unnamed Space Idle - 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.
Jul 27, 2023
South Scrimshaw, Part One - 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.
Jun 9, 2023
Pixel Starships - 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.
May 23, 2023
Omega Strikers - It's either not for you or the best thing you ever played
Apr 27, 2023
SCP: Observer - 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.
Apr 25, 2023
Limbus Company - 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.
Feb 26, 2023
EMPTY SHELL: PROLOGUE - 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.
Jan 6, 2023
SCP: Labrat - 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.
Dec 24, 2022
Chicken Invaders Universe - A deliciously addictive core of finger-blistering shooting action, surrounded by delectable morsels of galactic exploration, spacecraft customization, and community competitions.
Dec 15, 2022
Galaxy Life - 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!
Aug 31, 2022
Quake Champions - Step into the Arena. Compete against players from around the world in this fast-paced shooter that combines the dark mythos of the original Quake with the skill-based competition of Quake III Arena. Become a Champion.
Aug 18, 2022
Alien Removal Division - 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.
Jun 17, 2022
Trimps - 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.
May 2, 2022
Prosperous Universe - 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.
Apr 20, 2022
Blind Fate: Edo no Yami — Dojo - 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.
Dec 16, 2021
The Timeless Child - Prologue - 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.
Dec 10, 2021
I MAED A GAM3 W1TH Z0MB1ES 1N IT!!!1 - A top down twin stick zombie slaying shooter that you are sure to play again and again!
Nov 11, 2021
Cell to Singularity - Evolution Never Ends - The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.
Nov 3, 2021
Crab Game - 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.
Oct 29, 2021
Lemnis Gate - 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.
Sep 28, 2021
Swing Dunk - 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!
Sep 15, 2021
Frog Fighters - Frog Fighters is a light-hearted, fast-paced, third-person-shooter where you become a frog on a lily pad with an ability to shoot other flying frogs with different types of laser-leafs.
May 30, 2021
