Best Sci-fi games on Steam
Unlike generic lists, our strategy game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated sci-fi games. For those who prefer not to search, lists of the most played, top deals and best free sci-fi games are available at the bottom of the page.
Infested Planet
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.GIGANTIC ARMY
Side-scrolling mech-shooting bad-assery is BACK!GIGANTIC ARMY is a heartfelt homage to 16-bit era mech shooters such as Cybernator / Assault Suits Valken, Metal Warriors, and Front Mission: Gun Hazard, developed by the studio behind the acclaimed shooter SATAZIUS.Tower of Guns
Tower of Guns is a fast paced first-person-shooter for the twitch gamer... with a few randomized elements to keep it fresh with each playthrough. It's a short burst "Lunch Break FPS"... not unlike Binding of Isaac mixed with Doom 2. Tower of Guns was made by a guy named Joe (with his brother Mike composing the music).Assassin's Creed Freedom Cry
Play as Adewale, an ex-slave turned Assassin fighting for freedom with the help of his own Pirate crew.Ultionus: A Tale of Petty Revenge
Ultionus is a love-letter to the home computer arcade games of the late 80s and early 90s, with colorful 2D visuals, catchy chiptune music by the legendary Jake 'Virt' Kaufman, and 7 stages of hard-as-nails gameplay.Drunken Robot Pornography
Bullet-hell, boss-battle, first-person shooter, with giant-robots, martinis and jetpacks. YES. Drink the cocktails. Fight the titans. Make your own Titans. Drink your friend's cocktails.STRIDER™ / ストライダー飛竜®
Strider returns in a brand new adventure, complete with incredible side-scrolling action, and lightning fast combat all in a massive interconnected world! Download the full game February 19th and become the original assassin!Drox Operative
Drox Operative is a starship action RPG with warring alien races, fierce space battles, a dynamic, evolving galaxy, and co-op multiplayer for Windows and Mac.Eons ago the Drox ruled the galaxy through their mighty Operatives. These elite starship captains were trained to accomplish the impossible at whatever cost necessary.Descent
Prepare To Start Your Descent.Sensory overload in 360° 3-D.Welcome to Descent™ - 27 levels of the most mind-bending, stomach-churning action game ever. Featuring true 3-Dimensional worlds with light source shading, texture mapping, 3-D morphing, directional sound effects and sizzling music, this is technology taken to the limit.Oniken: Unstoppable Edition
When a global war nearly decimated humankind, an evil military organization called Oniken takes advantage of the situation to dominate and oppress the few remaining survivors. Even though any resistance to this organization seemed hopeless, a small rebel movement organizes strikes against Oniken.Jets'n'Guns Gold
Jets'n'Guns is a heavy piece of ground shaking rock blasting action with graphics and special effects that will blow you eyes out! Enjoy yourself in almost-insane action adventure of saving the universe from the deadly threat of more than 270 unique monsters in the campaign of 43 levels.Hostile Waters: Antaeus Rising
In 2032 an Earth that knows only peace is forced to relearn the art of war. Twenty years have passed since the population of Earth did a fine job of destroying nearly everything in one final struggle for power by the politicians and military leaders.Broken Age
A family friendly, hand-animated, puzzle-filled adventure game with an all-star cast, including Elijah Wood, Jack Black and Masasa Moyo. Funded by a record breaking crowdfunding campaign and designed by industry legend Tim Schafer, Broken Age is a timeless coming-of-age story.Original War
An American geological expedition, under a UN mandate, assesses the natural resources in a distant part of Siberia, deep in the trackless steppes of Eastern Russia. But instead of oil, they discover a deposit of a hitherto unknown mineral.Signs of Life
Signs of Life is a sci-fi survival sandbox platformer with a combination of procedurally generated and hand-crafted content. You'll explore mysterious locations, Mine blocks for resources, and meet strange (and some familiar) creatures, some of which don't even want to kill you and eat your corpse.Gun Metal
Gun Metal is a futuristic action-packed experience where you take control of the fully transformable prototype combat vehicle known as the Havoc Suit.The Havoc Suit, a prototype combat vehicle, remains the only hope to save civilization from a tireless enemy.War of the Human Tanks
War of the Human Tanks is a story driven strategy game with a gameplay reminiscent of Battleship and Chess, featuring a story of war, loyalty, sacrifice and human shaped tanks.3089 -- Futuristic Action RPG
3089 is a futuristic, procedurally generated, open-world action role-playing game. All terrain, enemies, weapons, items, quests & more are uniquely generated. Will you obey your creator, the Overlord, or find your own path?METAL GEAR RISING: REVENGEANCE
Developed by Kojima Productions and PlatinumGames, METAL GEAR RISING: REVENGEANCE takes the renowned METAL GEAR franchise into exciting new territory with an all-new action experience. The game seamlessly melds pure action and epic story-telling that surrounds Raiden – a child soldier transformed into a half-human, half-cyborg ninja who...UFO: Afterlight
The story is situated on Mars. It starts where UFO: Aftermath left off and runs simultaneously with UFO: Aftershock. While the Laputans on Earth are fighting Wargots and Starghosts and finding out what caused the destruction of their home planet, a small colony on Mars is trying to survive and flourish.Viscera Cleanup Detail: Santa's Rampage
Tragedy! Santa; the toy giving folk-hero, and purveyor of fine Christmas goods, has had enough. Endless requests from greedy children wanting more and more every year, tax increases, pressure from elf unions, bills, reindeer!Not The Robots
You are a robot in an office building. You have to eat furniture and not get caught. A mysterious story unfolds.Not The Robots is this year’s most exciting Roguelike Stealth Furniture Eating Simulator. It’s a game with random levels, permadeath, and the goal of eating furniture - which is also your stealth cover.Shufflepuck Cantina Deluxe
After jumping through a wormhole and landing onto this forsaken planet far from home, you are standing in front of a huge interstellar Casino where everyone plays air hockey for a living! Plug your Oculus Rift DK (or not!) and master the finest Shufflepucking techniques!Most played sci-fi games on Steam
Take a look at the top sci-fi games that are currently attracting the largest player bases on the Steam platform, as of May 01st 2025.
1. Stellaris
Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities. Stellaris is a space, grand strategy and strategy game developed by Paradox Development Studio and published by Paradox Interactive. Released on May 09th 2016 has received 182,155 reviews of which 157,931 were positive and 24,224 were negative resulting in a rating of 8.6 out of 10. The game has hit the top spot as the #1 most played sci-fi game, thanks to its 9,939 peak concurrent players over the last day.2. No Man's Sky
No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe. No Man's Sky is a open world, open world survival craft and space game developed and published by Hello Games. Released on August 12th 2016 has received 350,242 reviews of which 290,801 were positive and 59,441 were negative resulting in a rating of 8.2 out of 10. While seeing 5,976 players online at once in the last 24 hours, this game is currently ranked #2 among sci-fi games based on player count.3. Elite Dangerous
Take control of your own starship in a cutthroat galaxy. Elite Dangerous is the definitive massively multiplayer space epic. Elite Dangerous is a space sim, space and open world game developed and published by Frontier Developments. Released on April 02nd 2015 has received 99,333 reviews of which 76,805 were positive and 22,528 were negative resulting in a rating of 7.7 out of 10. While seeing 5,848 players online at once in the last 24 hours, this game is currently ranked #3 among sci-fi games based on player count.4. Brotato
Brotato is a top-down arena shooter roguelite where you play a potato wielding up to 6 weapons at a time to fight off hordes of aliens. Choose from a variety of traits and items to create unique builds and survive until help arrives. Brotato is a rogue-like, singleplayer and action roguelike game developed and published by Blobfish. Released on June 23rd 2023 has received 96,077 reviews of which 92,896 were positive and 3,181 were negative resulting in an impressive rating of 9.5 out of 10. With 3,745 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played sci-fi games.5. Mass Effect™ Legendary Edition
The Mass Effect™ Legendary Edition includes single-player base content and over 40 DLC from the highly acclaimed Mass Effect, Mass Effect 2, and Mass Effect 3 games, including promo weapons, armors, and packs — remastered and optimized for 4K Ultra HD. Mass Effect™ Legendary Edition is a story rich, rpg and choices matter game developed by BioWare and published by Electronic Arts. Released on May 14th 2021 has received 55,425 reviews of which 50,469 were positive and 4,956 were negative resulting in a rating of 9.0 out of 10. With 2,369 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played sci-fi games.6. STAR WARS™ Empire at War - Gold Pack
Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld? STAR WARS™ Empire at War - Gold Pack is a strategy, rts and space game developed by Petroglyph and published by LucasArts, Lucasfilm and Disney. Released on May 25th 2010 has received 38,906 reviews of which 37,985 were positive and 921 were negative resulting in an impressive rating of 9.6 out of 10. With 2,037 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played sci-fi games.7. BATTLETECH
Take command of your own mercenary outfit of 'Mechs and the MechWarriors that pilot them, struggling to stay afloat as you find yourself drawn into a brutal interstellar civil war. BATTLETECH is a mechs, strategy and turn-based tactics game developed by Harebrained Schemes and published by Paradox Interactive. Released on April 24th 2018 has received 31,396 reviews of which 26,290 were positive and 5,106 were negative resulting in a rating of 8.2 out of 10. With 1,456 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played sci-fi games.8. Half-Life 2
Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat. Half-Life 2 is a fps, action and sci-fi game developed and published by Valve. Released on November 16th 2004 has received 242,865 reviews of which 237,035 were positive and 5,830 were negative resulting in an impressive rating of 9.7 out of 10. With 1,378 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played sci-fi games.9. FTL: Faster Than Light
This "spaceship simulation roguelike-like" allows you to take your ship and crew on an adventure through a randomly generated galaxy filled with glory and bitter defeat. FTL: Faster Than Light is a rogue-like, space and strategy game developed and published by Subset Games. Released on September 14th 2012 has received 74,588 reviews of which 71,155 were positive and 3,433 were negative resulting in an impressive rating of 9.4 out of 10. With 1,251 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played sci-fi games.10. Star Trek Online
In Star Trek Online, the Star Trek universe appears for the first time on a truly massive scale. Players take the captain's chair as they command their own starship and crew. Explore strange new worlds, seek out new life and new civilizations, and boldly go where no one has gone before. Star Trek Online is a free to play, sci-fi and massively multiplayer game developed by Cryptic Studios and published by Arc Games. Released on January 31st 2012 has received 20,043 reviews of which 15,849 were positive and 4,194 were negative resulting in a rating of 7.8 out of 10. With 1,071 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played sci-fi games.Best deals on sci-fi games on Steam
Discover fantastic savings with the best discounts on a variety of sci-fi games available on Steam right now, updated on May 01st 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted sci-fi games.
1. Citizen Sleeper
Roleplaying in the ruins of interplanetary capitalism. Live the life of an escaped worker, washed-up on a lawless station at the edge of an interstellar society. Inspired by the flexibility and freedom of TTRPGs, explore the station, choose your friends, escape your past and change your future. Citizen Sleeper is a rpg, dice and story rich game developed by Jump Over The Age and published by Fellow Traveller. Released on May 05th 2022 has received 7,869 reviews of which 7,310 were positive and 559 were negative resulting in an impressive rating of 9 out of 10. Featuring a massive 95% discount, this game currently holds the #1 spot in the best deals for sci-fi category.2. Homeworld: Deserts of Kharak
A ground-based RTS prequel to the classic Homeworld games. Assemble your fleet and lead them to victory on the shifting sands of Kharak in this compelling strategy game for PC from Blackbird Interactive. Homeworld: Deserts of Kharak is a strategy, rts and sci-fi game developed by Blackbird Interactive and published by Gearbox Publishing. Released on January 20th 2016 has received 8,484 reviews of which 6,772 were positive and 1,712 were negative resulting in a rating of 7.8 out of 10. Thanks to its incredible 95% discount, this game is now the #2 best deal in sci-fi games.3. Observation
Observation is a sci-fi thriller uncovering what happened to Dr. Emma Fisher, and the crew of her mission, through the lens of the station’s artificial intelligence S.A.M. Observation is a indie, adventure and space game developed by No Code and published by Devolver Digital. Released on May 21st 2020 has received 4,742 reviews of which 3,718 were positive and 1,024 were negative resulting in a rating of 7.6 out of 10. Thanks to its incredible 95% discount, this game is now the #3 best deal in sci-fi games.4. The Entropy Centre
Think in reverse. Outsmart the impossible. A mind-bending first-person adventure where you solve ingenious and complex puzzles by rewinding objects through time. The Entropy Centre is a puzzle, first-person and sci-fi game developed by Stubby Games and published by Playstack. Released on November 03rd 2022 has received 3,538 reviews of which 3,186 were positive and 352 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 94% discount, this title has earned the #4 position in the best deals for sci-fi games.5. The Gunk
The Gunk is an action-adventure game in which you play as Rani, part of our duo of gritty space haulers. As they’re struggling to bring in funds, they chance upon an untouched planet brimming with life. They came in search of valuable resources, and it looks like they’ve hit the jackpot… The Gunk is a action-adventure, atmospheric and sci-fi game developed by Image & Form Games and published by Thunderful Publishing. Released on April 29th 2022 has received 2,664 reviews of which 2,289 were positive and 375 were negative resulting in a rating of 8.3 out of 10. Currently offered at a significant 94% discount, this title has earned the #5 position in the best deals for sci-fi games.6. Hellpoint
Hellpoint is an intense action RPG taking place on Irid Novo, a derelict space station soaked in an intoxicating dark sci fi atmosphere. Fight dreadful creatures, face the Cosmic Gods and unravel their twisted story. Should the challenge be too great, play with a friend in local or online coop. Hellpoint is a souls-like, sci-fi and action game developed by Cradle Games and published by tinyBuild. Released on July 30th 2020 has received 4,269 reviews of which 3,124 were positive and 1,145 were negative resulting in a rating of 7.1 out of 10. Currently offered at a significant 94% discount, this title has earned the #6 position in the best deals for sci-fi games.7. SPRAWL
SPRAWL is a hardcore retro FPS set in an endless cyberpunk megalopolis. Escape the walled city and take on the militarized government of the sprawl. Fueled by the blood of your enemies and a mysterious voice in your head, make your way towards the spire to topple whatever lays within. SPRAWL is a controller, sci-fi and combat game developed by MAETH and published by Rogue Games and Inc.. Released on August 23rd 2023 has received 1,961 reviews of which 1,721 were positive and 240 were negative resulting in a rating of 8.4 out of 10. Currently offered at a significant 93% discount, this title has earned the #7 position in the best deals for sci-fi games.8. Scars Above
Scars Above is a challenging sci-fi third-person action adventure shooter combining the rewarding feel of overcoming difficulty with a compelling and intricate story, set in a mysterious alien world to explore. Scars Above is a action, adventure and female protagonist game developed by Mad Head Games and published by Prime Matter. Released on February 28th 2023 has received 2,702 reviews of which 2,087 were positive and 615 were negative resulting in a rating of 7.5 out of 10. Currently offered at a significant 93% discount, this title has earned the #8 position in the best deals for sci-fi games.9. INDUSTRIA
Embark on a gripping journey in INDUSTRIA, an atmospheric FPS set in Cold War-era East Berlin. Unravel the secrets of a mysterious parallel dimension while searching for a missing colleague. Explore a haunting reality where the truth awaits. Discover the dark past that lies beyond. INDUSTRIA is a fps, action and sci-fi game developed by Bleakmill and published by Headup. Released on September 30th 2021 has received 3,200 reviews of which 2,273 were positive and 927 were negative resulting in a rating of 6.9 out of 10. Currently offered at a significant 93% discount, this title has earned the #9 position in the best deals for sci-fi games.10. XCOM: Enemy Unknown
The XCOM: Enemy Unknown - Slingshot Pack is Now Available! XCOM: Enemy Unknown is a turn-based strategy, tactical and strategy game developed by Firaxis Games and Feral Interactive (Linux) and published by Feral Interactive (Linux) and 2K. Released on October 11th 2012 has received 56,237 reviews of which 52,569 were positive and 3,668 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 92% discount, this title has earned the #10 position in the best deals for sci-fi games.Free sci-fi games on Steam
Check out this fantastic list of free-to-play sci-fi games you can enjoy on Steam right now, updated on May 01st 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play sci-fi games.