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.

Filters & Lists
Dune: Awakening Rise from survival to greatness and challenge the power of an Imperium in Dune: Awakening, a multiplayer survival game on a massive scale. Survive the sandworm, craft your ornithopter, build a fortress, and ascend to power on an open world Arrakis shared with hundreds of other players.

Price 49.99€
Rating 8.5
Release 10 Jun 2025
Cyber Knights: Flashpoint Cyberpunk mercenaries RPG! Turn-based squad tactics with unique heist-planning strategy. Build your crew wisely; their stories will become interwoven with your own. Pull off heists with powerful cyberware, faction connections, multiclassing, weapon modding, stealth, hacking, and more!

Price -20% 23.19€
Rating 9.0
Release 02 Jun 2025
Void War Command an ancient starship and fight your way to the heart of a dying Empire. Fend off attacks from demented cultists, craven space pirates, and xenophobic Imperial soldiers. Discover powerful artifacts and use them to build your ship into a fearsome war engine.

Price 19.50€
Rating 8.5
Release 02 Jun 2025
POPUCOM Venture together with your friends on an unknown planet. Use color switching, match-3 shooting, and artifact powers to overcome challenges and keep advancing. What lies ahead of you is an adventure filled with wonder, hope, and much more to discover!

Price -65% 6.37€
Rating 8.3
Release 01 Jun 2025
Splitgate 2 Splitgate 2 is the only free-to-play shooter with portals, delivering next-level gunplay, fluid movement, and a constantly evolving experience, featuring a new Battle Royale where you can portal between unique worlds. Welcome to the future of sport.

Price Free to play
Rating 6.1
Release 22 May 2025
MOBILE SUIT GUNDAM SEED BATTLE DESTINY REMASTERED Become a pilot in the world of Mobile Suit Gundam SEED, for the first time available with English localization! Engage in thrilling, action-packed Gundam battles, complete missions, and tune up your newly acquired Mobile Suits!

Price -26% 29.99€
Rating 7.3
Release 21 May 2025
Mutants: Genesis Mutants: Genesis is an online card game that you can play solo or with up to 3 players in PvE and PvP modes! Join the next generation of Psycogs and climb the ranks to establish yourself as Champion! Collect hundreds of mutants, fashion your own deck, cooperate with or fight other players!

Price Free to play
Rating 7.3
Release 20 May 2025
Bioprototype Bioprototype, a Roguelike & Skill Customizing Rhapsody! This is an auto-bomber with programming elements. Customize your character skills with visual programming, utilize enemy organs to finish the mutation, and construct the ultimate prototype, one can survive in the endless wave of flesh.

Price Free to play
Rating 8.4
Release 19 May 2025
Villages & Dungeons A hardcore roguelite card game where deck-building strategies are at the core of everything! With a vast array of cards, random dungeons, a wealth of encounter events, and diverse enemies, it awaits your exploration and challenge.

Price 6.89€
Rating 8.4
Release 19 May 2025
Cubic Odyssey Embark on a galactic journey in Cubic Odyssey, an open-world adventure where you explore vibrant planets, craft tools, build vehicles, and fight the Red Darkness. Uncover ancient mysteries, and shape a universe full of life, danger, and limitless possibilities!

Price 24.99€
Rating 7.0
Release 14 May 2025
DOOM: The Dark Ages DOOM: The Dark Ages is the prequel to the critically acclaimed DOOM (2016) and DOOM Eternal that tells an epic cinematic story worthy of the DOOM Slayer’s legend. Players will step into the blood-stained boots of the DOOM Slayer, in this never-before-seen dark and sinister medieval war against Hell.

Price -29% 57.47€
Rating 8.5
Release 14 May 2025
Revenge of the Savage Planet Revenge of the Savage Planet is an upbeat, satirical action adventure Sci-Fi. Jump, shoot and collect your way across vibrant alien worlds, uncovering new gear and upgrades, while discovering various hidden secrets.

Price -26% 22.33€
Rating 7.8
Release 08 May 2025
Tower Dominion Build and design the terrain while defending your stronghold against alien invasion in this unique Roguelike tower defense. Choose from 30 heroes, survive enemy waves, and upgrade a variety of destructive towers to hold the line!

Price -42% 10.02€
Rating 8.0
Release 07 May 2025
Among Us 3D Teamwork and betrayal in space! In this PC & VR party game, Crewmates work together to complete tasks before one or more Impostors kill everyone aboard. Experience all of the same deception and deceit as the original Among Us, but now in all three dimensions.

Price 9.49€
Rating 6.1
Release 06 May 2025
Skin Deep Skin Deep is an immersive first-person shooter. We got sneezing. We got things getting stuck in your feet. Stalk through a vast non-linear starship and sneak, subvert, and sabotage to survive in this stellar sandbox. You're outnumbered, outgunned, and have no shoes. Welcome to Skin Deep!

Price 18.49€
Rating 9.0
Release 30 Apr 2025
Deadzone: Rogue Deadzone: Rogue is a roguelite FPS set in space. Blast through hordes of enemies with devastating weapons. Define your combat style with powerful augments and upgrades. Grow stronger with each death, solo or in co-op. Fight. Die. Revive. Repeat.

Price -33% 16.77€
Rating 8.0
Release 29 Apr 2025
Approaching Infinity Approaching Infinity is a turn-based space RPG in the spirit of the sci-fi classics, with endless progression and exploration. Fight tactical battles or use diplomacy. Seek powerful artifacts. Quest, mine, trade, and craft. Level up forever or attempt 10 victories in hardcore or adventure mode.

Price 17.49€
Rating 8.8
Release 29 Apr 2025
The Hundred Line -Last Defense Academy- Kazutaka Kodaka and Kotaro Uchikoshi join forces for the first time to deliver the ULTIMATE adventure game! 15 students are tasked with defending a school from grotesque monsters for 100 days. Can they make it to the end? And will they survive long enough to uncover the truth?

Price -31% 41.63€
Rating 8.6
Release 23 Apr 2025
Old Skies A time travel adventure spanning two hundred years! Dive into the past with time agent Fia Quinn as she embarks on seven trips through time. History is up for grabs, from the speakeasies of Prohibition to the vicious gangs of the Gilded Age to the World Trade Center on September 10, 2001.

Price 19.50€
Rating 8.8
Release 23 Apr 2025
Bionic Bay A scientist uses a unique teleportation instrument to escape an ancient biomechanical world filled with imaginative technology, deadly traps, and hidden secrets.

Price -47% 10.67€
Rating 8.3
Release 16 Apr 2025
Forever Skies A first-person survival game set on a post-apocalyptic, ecologically ruined Earth. Play solo or with up to 3 friends as you build, upgrade, and fly a high-tech airship. Scavenge resources, craft tools, and face dangers on the surface as you hunt for a cure to save humanity.

Price 28.99€
Rating 7.9
Release 14 Apr 2025
Viscerafest Viscerafest is a Sci-Fi Fantasy Singleplayer Arena FPS with minor Collectathon elements. Fight through hordes of aliens and eldritch monstrosities wielding a slew of powerful weapons, juggling your resources, and exploring over 23 intricately designed hand-crafted levels.

Price -96% 0.89€
Rating 8.1
Release 14 Apr 2025
The Talos Principle: Reawakened Step back into a world of thought-provoking puzzles, philosophical intrigue, and breathtaking visuals with The Talos Principle: Reawakened - a first-person puzzle masterpiece for both new players and long-time fans alike.

Price -23% 30.87€
Rating 8.4
Release 10 Apr 2025
GIRLS MADE PUDDING "When there's nobody there to see you, you disappear." In Girls Made Pudding, two girls tour a series of towns that people have disappeared from.

Price 9.75€
Rating 8.7
Release 09 Apr 2025

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 June 14th 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 185,433 reviews of which 159,527 were positive and 25,906 were negative resulting in a rating of 8.5 out of 10. The game has hit the top spot as the #1 most played sci-fi game, thanks to its 13,840 peak concurrent players over the last day.
8.5
159,527
25,906

13,840
players

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 352,858 reviews of which 293,332 were positive and 59,526 were negative resulting in a rating of 8.2 out of 10. While seeing 12,153 players online at once in the last 24 hours, this game is currently ranked #2 among sci-fi games based on player count.
8.2
293,332
59,526

12,153
players

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 100,024 reviews of which 77,388 were positive and 22,636 were negative resulting in a rating of 7.7 out of 10. While seeing 4,502 players online at once in the last 24 hours, this game is currently ranked #3 among sci-fi games based on player count.
7.7
77,388
22,636

4,502
players

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 97,716 reviews of which 94,445 were positive and 3,271 were negative resulting in an impressive rating of 9.5 out of 10. With 3,814 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played sci-fi games.
9.5
94,445
3,271

3,814
players

5. 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 39,435 reviews of which 38,503 were positive and 932 were negative resulting in an impressive rating of 9.6 out of 10. With 2,809 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played sci-fi games.
9.6
38,503
932

2,809
players

6. 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 56,328 reviews of which 51,295 were positive and 5,033 were negative resulting in a rating of 9.0 out of 10. With 2,541 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played sci-fi games.
9.0
51,295
5,033

2,541
players

7. 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 245,627 reviews of which 239,721 were positive and 5,906 were negative resulting in an impressive rating of 9.7 out of 10. With 1,506 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played sci-fi games.
9.7
239,721
5,906

1,506
players

8. 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 31,563 reviews of which 26,438 were positive and 5,125 were negative resulting in a rating of 8.2 out of 10. With 1,478 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played sci-fi games.
8.2
26,438
5,125

1,478
players

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 75,052 reviews of which 71,561 were positive and 3,491 were negative resulting in an impressive rating of 9.4 out of 10. With 1,399 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played sci-fi games.
9.4
71,561
3,491

1,399
players

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 20,143 reviews of which 15,937 were positive and 4,206 were negative resulting in a rating of 7.8 out of 10. With 1,035 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played sci-fi games.
7.8
15,937
4,206

1,035
players

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 June 14th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted sci-fi games.

1. Battlestar Galactica Deadlock

In Battlestar Galactica Deadlock™ you’ll take command of the Colonial Fleet in defense of the Twelve Colonies during the First Cylon War. Lead many different types of ships in this 3D tactical game. Every decision counts, your strategy will be vital – can you ensure mankind’s survival? Battlestar Galactica Deadlock is a strategy, space and sci-fi game developed by Black Lab Games and published by Slitherine Ltd.. Released on August 31st 2017 has received 3,460 reviews of which 2,906 were positive and 554 were negative resulting in a rating of 8.1 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for sci-fi category.
8.1
2,906
554

-99% 38.99€ 0.44€

2. Interstellar Space: Genesis

Interstellar Space: Genesis is a turn-based space 4X strategy game in which you attempt to build a thriving galactic empire. Discover mysteries among the stars, colonize worlds, and engage enemies in tactical turn-based combat on your journey to becoming the ruler of the galaxy! Interstellar Space: Genesis is a strategy, indie and 4x game developed and published by Praxis Games. Released on July 25th 2019 has received 772 reviews of which 648 were positive and 124 were negative resulting in a rating of 7.9 out of 10. Thanks to its incredible 99% discount, this game is now the #2 best deal in sci-fi games.
7.9
648
124

-99% 27.99€ 0.45€

3. 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 8,519 reviews of which 6,789 were positive and 1,730 were negative resulting in a rating of 7.8 out of 10. Thanks to its incredible 99% discount, this game is now the #3 best deal in sci-fi games.
7.8
6,789
1,730

-99% 45.99€ 0.88€

4. Ultros

ULTROS is a psychedelic metroidvania where you wake up stranded on The Sarcophagus — a cosmic uterus holding an ancient, demonic being. Trapped in the loop of a black hole, you will have to explore The Sarcophagus and meet its inhabitants to understand the part you play... Ultros is a metroidvania, adventure and platformer game developed by Hadoque and published by Kepler Interactive. Released on February 13th 2024 has received 744 reviews of which 594 were positive and 150 were negative resulting in a rating of 7.6 out of 10. Currently offered at a significant 99% discount, this title has earned the #4 position in the best deals for sci-fi games.
7.6
594
150

-99% 34.99€ 0.57€

5. Aven Colony

Build a new home for humanity in Aven Colony. Discover Aven Prime - an alien planet of deserts, tundras, and wetlands light years from earth. Build your colonies into massive, sprawling cities whilst dealing with the challenges faced when settling on a new world. Aven Colony is a colony sim, city builder and strategy game developed by Mothership Entertainment LLC and published by Team17 Digital Ltd. Released on July 25th 2017 has received 2,638 reviews of which 1,921 were positive and 717 were negative resulting in a rating of 7.1 out of 10. Currently offered at a significant 99% discount, this title has earned the #5 position in the best deals for sci-fi games.
7.1
1,921
717

-99% 29.99€ 0.47€

6. Starpoint Gemini 2

Captain your own space ship and roam the galaxy in 3D in this tactical space simulator with tons of RPG depth ! Space has never looked so inviting - but images can betray...It has been two years since the end of the second Gemini war, the situation in the wartorn system is further from resolution than ever. Starpoint Gemini 2 is a space, simulation and rpg game developed and published by Little Green Men Games. Released on September 26th 2014 has received 4,093 reviews of which 2,843 were positive and 1,250 were negative resulting in a rating of 6.8 out of 10. Currently offered at a significant 99% discount, this title has earned the #6 position in the best deals for sci-fi games.
6.8
2,843
1,250

-99% 31.99€ 0.51€

7. Rebel Galaxy Outlaw

Out of cash, out of luck, out on the fringe. Juno Markev has a killer to tail, a debt to pay, and more trouble headed her way. Rebel Galaxy Outlaw takes place in a greasy, blue-collar world of outlaws, truckers, cops and thieves. Rebel Galaxy Outlaw is a space sim, open world and action-adventure game developed and published by Double Damage Games. Released on September 22nd 2020 has received 1,033 reviews of which 659 were positive and 374 were negative resulting in a rating of 6.2 out of 10. Currently offered at a significant 99% discount, this title has earned the #7 position in the best deals for sci-fi games.
6.2
659
374

-99% 24.99€ 0.43€

8. 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 56,414 reviews of which 52,717 were positive and 3,697 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for sci-fi games.
9.2
52,717
3,697

-98% 19.99€ 0.47€

9. 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 8,105 reviews of which 7,522 were positive and 583 were negative resulting in an impressive rating of 9 out of 10. Currently offered at a significant 98% discount, this title has earned the #9 position in the best deals for sci-fi games.
9
7,522
583

-98% 19.50€ 0.56€

10. Dome Keeper

Defend against waves of alien attackers in this innovative roguelike survival miner. Dig for resources and choose from powerful upgrade paths. Is there enough time to mine a little deeper and get back to defend before the monsters attack your dome? Dome Keeper is a singleplayer, post-apocalyptic and rogue-like game developed by Bippinbits and published by Raw Fury. Released on September 27th 2022 has received 16,212 reviews of which 14,952 were positive and 1,260 were negative resulting in a rating of 9.0 out of 10. Currently offered at a significant 98% discount, this title has earned the #10 position in the best deals for sci-fi games.
9.0
14,952
1,260

-98% 17.99€ 0.44€

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 June 14th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play sci-fi games.

1. 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 20,143 reviews of which 15,937 were positive and 4,206 were negative resulting in a rating of 7.8 out of 10. With 1,035 active players enjoying it for free, this strategy game has reached the #1 spot among the top free sci-fi games on Steam.
7.8
15,937
4,206

1,035
players

2. 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. Pixel Starships is a sci-fi, space and strategy game developed and published by SavySoda. Released on May 23rd 2023 has received 2,732 reviews of which 2,008 were positive and 724 were negative resulting in a rating of 7.1 out of 10. Thanks to its free to play tag and a daily player base of 136, this sci-fi game has secured the #2 spot in the ranking of free sci-fi games on Steam.
7.1
2,008
724

136
players

3. Endless Sky

Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters. Endless Sky is a space, free to play and open world game developed and published by Michael Zahniser. Released on October 30th 2015 has received 6,651 reviews of which 6,141 were positive and 510 were negative resulting in a rating of 8.9 out of 10. Thanks to its free to play tag and a daily player base of 132, this sci-fi game has secured the #3 spot in the ranking of free sci-fi games on Steam.
8.9
6,141
510

132
players

4. Hades' Star

A unique space strategy game where thousands of players participate in one shared galaxy. Hades' Star is a free to play, space and strategy game developed and published by Parallel Space Inc. Released on February 27th 2019 has received 2,577 reviews of which 1,874 were positive and 703 were negative resulting in a rating of 7.1 out of 10. Attracting a solid base of 108 players due to its free access, this strategy game has achieved the #4 position in the best free sci-fi games on Steam.
7.1
1,874
703

108
players

5. 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. Prosperous Universe is a early access, economy and resource management game developed and published by simulogics. Released on April 20th 2022 has received 898 reviews of which 675 were positive and 223 were negative resulting in a rating of 7.2 out of 10. The game currently holds the #5 spot among the most played free sci-fi games on Steam.
7.2
675
223

33
players

6. 买个可乐饼吧! - Buy a Croquette!

March 2012, Nagano. The smart and brave high school girl, Chio Aozora, is facing a major crisis: she has no money to buy a croquette! Navigate through the streets and alleys of Nagano, interact with a variety of characters, solve complex puzzles, collect 380 yen in coins, and buy a croquette! 买个可乐饼吧! - Buy a Croquette! is a rpgmaker, mystery and sci-fi game developed by 越青 and published by Eternal Dream. Released on April 27th 2024 has received 4,397 reviews of which 4,355 were positive and 42 were negative resulting in an impressive rating of 9.5 out of 10. The game currently holds the #6 spot among the most played free sci-fi games on Steam.
9.5
4,355
42

6
players

7. 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. Toaster Arena is a early access, action and fps game developed and published by Shadow_hawk. Released on January 20th 2025 has received 311 reviews of which 284 were positive and 27 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #7 spot among the most played free sci-fi games on Steam.
8.4
284
27

5
players

8. Terraformers: First Steps on Mars

Terraformers: First Steps on Mars is a free prologue of Terraformers, featuring an exclusive challenge to lead humanity's first attempt at settling the Red Planet. Terraformers: First Steps on Mars is a strategy, simulation and colony sim game developed by Asteroid Lab and published by Goblinz Publishing and IndieArk. Released on October 23rd 2021 has received 683 reviews of which 610 were positive and 73 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #8 spot among the most played free sci-fi games on Steam.
8.4
610
73

3
players

9. Global Agenda: Free Agent

2155. From the ashes of the devastating Third Great War rose the Commonwealth, an oppressive world government determined to control the entire planet. The few remaining independent factions retaliate the only way they can, with elite teams of special operatives trained in advanced warfare tactics and equipped with high-tech weaponry. Global Agenda: Free Agent is a free to play, action and massively multiplayer game developed and published by Hi-Rez Studios. Released on June 14th 2011 has received 1,275 reviews of which 987 were positive and 288 were negative resulting in a rating of 7.4 out of 10. The game currently holds the #9 spot among the most played free sci-fi games on Steam.
7.4
987
288

2
players

10. Red Planet Farming

Become the first Agricultural Director of Mars in Red Planet Farming! This casual strategy game tasks players with producing enough food to feed a growing population of settlers on the red planet. Red Planet Farming is a strategy, indie and sci-fi game developed by Nina Demirjian, Sean Park and Sean Porio and published by Nina Demirjian. Released on May 25th 2020 has received 832 reviews of which 800 were positive and 32 were negative resulting in an impressive rating of 9.0 out of 10. The game currently holds the #10 spot among the most played free sci-fi games on Steam.
9.0
800
32

1
players