Best Free to Play 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 April 01st 2026. Looking for even more free titles? Explore the complete list of the best free to play sci-fi games on Steam.
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1. Star Trek Timelines
Explore the Final Frontier in the ultimate sci-fi strategy RPG, Star Trek Timelines! Join Starfleet and overcome challenges as you boldly go where no game has gone before – across the entire history of Star Trek. Star Trek Timelines is a strategy, space and adventure game. Released on July 12th 2017 has received 1,430 reviews of which 938 were positive and 492 were negative resulting in a rating of 6.4 out of 10. The game has hit the top spot as the #1 most played sci-fi game, thanks to its 211 peak concurrent players over the last day.
6.4
938
492
211
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. 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. While seeing 165 players online at once in the last 24 hours, this game is currently ranked #2 among sci-fi games based on player count.
7.1
2,008
724
165
players
3. 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. Released on April 20th 2022 has received 1,026 reviews of which 764 were positive and 262 were negative resulting in a rating of 7.1 out of 10. The game currently holds the #3 spot among the most played sci-fi games.
7.1
764
262
30
players
4. 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. 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 #4 spot among the most played sci-fi games.
9.0
800
32
1
players
5. Star Wars: Droid Repair Bay
In Star Wars: Droid Repair Bay by ILMxLAB, Poe Dameron's sidekick needs your help. Repair BB-8 and his astromech droid friends, each with their own unique personalities, so they can roll back into the fight against the First Order. Star Wars: Droid Repair Bay is a vr, robots and adventure game. Released on December 06th 2017 has received 539 reviews of which 484 were positive and 55 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #5 spot among the most played sci-fi games.
8.4
484
55
1
players
6. Buy a Croquette!
March 2012, Nagano. The brave and clever high school girl, Chio Aozora, is facing a major crisis: she doesn’t have enough 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, and buy a croquette! Buy a Croquette! is a rpgmaker, mystery and sci-fi game. 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 sci-fi games.
9.5
4,355
42
7. 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. South Scrimshaw, Part One is a sci-fi, linear and hand-drawn game. Released on June 09th 2023 has received 1,549 reviews of which 1,533 were positive and 16 were negative resulting in an impressive rating of 9.4 out of 10. The game currently holds the #7 spot among the most played sci-fi games.
9.4
1,533
16
8. 旅燕归航 Swallow Homing
Space opera is a love letter written by humans to the stars. 旅燕归航 Swallow Homing is a indie, visual novel and sci-fi game. Released on February 13th 2019 has received 791 reviews of which 777 were positive and 14 were negative resulting in an impressive rating of 9.2 out of 10. The game currently holds the #8 spot among the most played sci-fi games.
9.2
777
14
9. There is No GreenDam
Simply wanted to find a job, but turned out to cause so much trouble. Then I received a mysterious test item... a young girl?! Am I gonna start living happily ever after? or just the prelude of a disaster! My story with her has just begun... Hope this game can make you feel a little touched. There is No GreenDam is a visual novel, anime and artificial intelligence game. Released on November 11th 2019 has received 1,851 reviews of which 1,765 were positive and 86 were negative resulting in an impressive rating of 9.1 out of 10. The game currently holds the #9 spot among the most played sci-fi games.
9.1
1,765
86
10. 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, open world and singleplayer game. 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. The game currently holds the #10 spot among the most played sci-fi games.
8.9
6,141
510
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