Free to Play Space Games on Steam
Check out this fantastic list of free-to-play space games you can enjoy on Steam right now, updated on September 15th 2025. Looking for even more free titles? Explore the complete list of the best free to play space games.
Lists & Categories
1. 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. Unnamed Space Idle is a game developed and published by . Released on July 27th 2023 has received 3,275 reviews of which 3,038 were positive and 237 were negative resulting in a rating of 8.9 out of 10. The game has hit the top spot as the #1 most played space game, thanks to its 3,779 peak concurrent players over the last day.
8.9
3,038
237
3,779
players
2. EVE Online
Over 20 years of legendary space battles! Explore a massive living universe of danger and opportunity in a challenging and highly rewarding sci-fi sandbox MMO. Fight, trade, build, and connect with a universe driven and shaped directly by players. EVE Online is a game developed and published by . Released on December 15th 2010 has received 36,388 reviews of which 26,813 were positive and 9,575 were negative resulting in a rating of 7.3 out of 10. While seeing 2,971 players online at once in the last 24 hours, this game is currently ranked #2 among space games based on player count.
7.3
26,813
9,575
2,971
players
3. 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 game developed and published by . Released on January 31st 2012 has received 20,145 reviews of which 15,939 were positive and 4,206 were negative resulting in a rating of 7.8 out of 10. While seeing 1,200 players online at once in the last 24 hours, this game is currently ranked #3 among space games based on player count.
7.8
15,939
4,206
1,200
players
4. 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! Super Sus is a game developed and published by . Released on July 30th 2024 has received 1,586 reviews of which 1,105 were positive and 481 were negative resulting in a rating of 6.8 out of 10. With 180 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played space games.
6.8
1,105
481
180
players
5. 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 game developed and published by . 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. With 156 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played space games.
6.4
938
492
156
players
6. Hades' Star
A unique space strategy game where thousands of players participate in one shared galaxy. Hades' Star is a game developed and published by . 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. With 123 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played space games.
7.1
1,874
703
123
players
7. 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 game developed and published by . 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. With 105 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played space games.
7.1
2,008
724
105
players
8. 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 game developed and published by . 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. With 102 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played space games.
8.9
6,141
510
102
players
9. Subspace Continuum
THE legendary free online multiplayer space shooter! Addictive, fast-paced, easy to learn, and impossible to master. Subspace Continuum is a game developed and published by . Released on July 03rd 2015 has received 599 reviews of which 530 were positive and 69 were negative resulting in a rating of 8.3 out of 10. The game currently holds the #9 spot among the most played space games.
8.3
530
69
24
players
10. 100 Space Cats
👨🚀🌌Join the cutest space adventure with Cats in Space! 🪐🚀 Explore charming hand-drawn space locations and adorable cosmo-cats on a quest to find 100 hidden kitties. 🕵️♂️❌ Can you find them all? 🕵️♂️🐈✅ 100 Space Cats is a game developed and published by . Released on June 16th 2024 has received 1,144 reviews of which 787 were positive and 357 were negative resulting in a rating of 6.7 out of 10. The game currently holds the #10 spot among the most played space games.
6.7
787
357
15
players
More Space & Related Games
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