Free Space Sim Games on Steam
Steam currently has 1,456 Space Sim games available to download and play. Explore our list of the best free games ranked by popularity and ratings. Data for this list is calculated from reviews and player counts reported directly by Steam and will be updated in real-time. Free Space Sim game rankings were last updated on 3/25/2026.
Looking for more? Explore other lists such as:
- Best space sim games on Steam
- Best space sim Steam Deck games
- Best space sim Steam games for Mac OS
- Best space sim Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
1. EVE Online
Over 20 years of legendary space battles! Explore a massive living universe of danger and opportunity in a challenging and highly rewarding space adventure. Fight, trade, build, and connect with a universe driven and shaped directly by players.
EVE Online holds the #1 spot for "best free Space Sim game on Steam" with a Player Score of 73. Its score was calculated by analyzing a total of 38,379 reviews on Steam. This breaks down to a total of 28,234 positive reviews and 10,145 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is possible to play EVE Online on the Steam Deck (though some functionality may be limited).
2. 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!
Galaxy Idle Clicker has achieved a Player Score of 72, placing it in the #2 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 1,122 reviews on Steam. This breaks down to a total of 843 positive reviews and 279 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Galaxy Idle Clicker on the Steam Deck (though some functionality may be limited).
| Release Date | 8/6/2025 |
| Developer | Soehnle |
| Publishers | |
| Steam App Id | 2962810 |
3. 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 has achieved a Player Score of 71, placing it in the #3 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 2,913 reviews on Steam. This breaks down to a total of 2,132 positive reviews and 781 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.
4. Star Hunter - Infinite Lagrange
In a remote corner of the Milky Way, you, a star hunter, will control a fleet, take on a wide variety of bounty contracts and missions, and venture into the vastness of space. You will hunt for mysterious items for your employers and explore specific targets in uncharted territory.
Star Hunter - Infinite Lagrange has achieved a Player Score of 56, placing it in the #4 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 1,010 reviews on Steam. This breaks down to a total of 579 positive reviews and 431 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Star Hunter - Infinite Lagrange on the Steam Deck.
| Release Date | 10/8/2021 |
| Developer | NetEase Games |
| Publisher | NetEase Games |
| Steam App Id | 1755920 |
5. Nova: Space Armada
An exceptional sci-fi strategy game based on space adventure as its core.
Nova: Space Armada has achieved a Player Score of 51, placing it in the #5 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 218 reviews on Steam. This breaks down to a total of 112 positive reviews and 106 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Nova: Space Armada on the Steam Deck (though some functionality may be limited).
| Release Date | 10/22/2024 |
| Developer | STONE3 PTE. LTD. |
| Publisher | STONE3 PTE. LTD. |
| Steam App Id | 1108270 |
6. 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 has achieved a Player Score of 89, placing it in the #6 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 6,941 reviews on Steam. This breaks down to a total of 6,408 positive reviews and 533 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Endless Sky on the Steam Deck (though some functionality may be limited).
| Release Date | 10/30/2015 |
| Developer | Michael Zahniser |
| Publisher | Michael Zahniser |
| Steam App Id | 404410 |
7. Star Conflict
Star Conflict is an action-packed, massively multiplayer space simulation game that puts players in the role of elite pilots engaging in a widespread interplanetary skirmish. The whole world for PVP and PVE!
Star Conflict has achieved a Player Score of 71, placing it in the #7 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 15,084 reviews on Steam. This breaks down to a total of 10,972 positive reviews and 4,112 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Star Conflict on the Steam Deck (though some functionality may be limited).
| Release Date | 2/27/2013 |
| Franchise | Gaijin Network Ltd |
| Developer | Star Gem Inc. |
| Publishers | |
| Steam App Id | 212070 |
8. DarkOrbit Reloaded
Dark Orbit is a free-2-play space MMO where three companies battle for galactic domination. Customize ships, trade resources, fight aliens and uncover a grand conspiracy on your epic cosmic journey. Thrilling PvP and PvE missions await! Will you lead your faction beyond the final frontier?
DarkOrbit Reloaded has achieved a Player Score of 32, placing it in the #8 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 346 reviews on Steam. This breaks down to a total of 98 positive reviews and 248 negative reviews — making it "Mostly Negative" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 12/3/2025 |
| Developer | Bigpoint GmbH |
| Publisher | Bigpoint GmbH |
| Steam App Id | 4054110 |
9. SPINNERS
SPINNERS. You get dropped a spinner every 2 hours 5 times per day. Each spinner is also made by the community in Discord. Come hang out with us and let's grow into something fantastic. Compete with friends, win the most unique item and become a spin master!
SPINNERS has achieved a Player Score of 67, placing it in the #9 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 120 reviews on Steam. This breaks down to a total of 86 positive reviews and 34 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows systems. Valve has also verified it as playable on the Steam Deck and will run well.
| Release Date | 7/16/2024 |
| Developers | |
| Publishers | |
| Steam App Id | 3064160 |
10. Idle Sphere
Stunning sphere-themed idle/incremental game. Experience simplicity's beauty.
Idle Sphere has achieved a Player Score of 50, placing it in the #10 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 313 reviews on Steam. This breaks down to a total of 155 positive reviews and 158 negative reviews — making it "Mixed" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is not possible to play or run Idle Sphere on the Steam Deck.
| Release Date | 11/17/2024 |
| Developers | |
| Publisher | Idle System, Inc. |
| Steam App Id | 3217600 |
More Free Space Sim Games
Explore even more rankings for the 100 best free Space Sim games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 3,478 | 12/16/2010 | 73 | Free | Steam Charts | |
| 784 | 8/6/2025 | 72 | Free | Steam Charts | |
| 142 | 5/23/2023 | 71 | Free | Steam Charts | |
| 120 | 10/8/2021 | 56 | Free | Steam Charts | |
| 103 | 10/22/2024 | 51 | Free | Steam Charts | |
| 103 | 10/30/2015 | 89 | Free | Steam Charts | |
| 76 | 2/27/2013 | 71 | Free | Steam Charts | |
| 65 | 12/3/2025 | 32 | Free | Steam Charts | |
| 64 | 7/16/2024 | 67 | Free | Steam Charts | |
| 56 | 11/17/2024 | 50 | Free | Steam Charts | |
 | 45 | 1/9/2026 | 77 | Free | Steam Charts | |
 | 39 | 10/14/2024 | 65 | Free | Steam Charts | |
 | 31 | 4/20/2022 | 71 | Free | Steam Charts | |
 | 30 | 10/31/2018 | 79 | Free | Steam Charts | |
 | 27 | 6/12/2020 | 64 | Free | Steam Charts | |
 | 26 | 5/26/2022 | 53 | Free | Steam Charts | |
 | 26 | 5/4/2021 | 81 | Free | Steam Charts | |
 | 21 | 8/27/2025 | 30 | Free | Steam Charts | |
 | 20 | 2/11/2024 | 84 | Free | Steam Charts | |
 | 18 | 9/22/2020 | 61 | Free | Steam Charts |
Soures & References
Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Player counts and rankings are enriched, analyzed, and updated in real-time to ensure we surface the most up-to-date insights. Learn more about the Steambase approach to data collection and our review methodology.
- Valve Corporation. (2026, March 25). Steam Store. Steam Store.
- Valve Corporation. (2026, March 25). EVE Online on Steam. Steam Store.
- Valve Corporation. (2026, March 16). Galaxy Idle Clicker on Steam. Steam Store.
- Valve Corporation. (2026, March 27). Pixel Starships on Steam. Steam Store.
- Valve Corporation. (2026, March 21). Star Hunter - Infinite Lagrange on Steam. Steam Store.
- Valve Corporation. (2026, March 27). Nova: Space Armada on Steam. Steam Store.
- Valve Corporation. (2026, February 18). Endless Sky on Steam. Steam Store.
- Valve Corporation. (2026, March 27). Star Conflict on Steam. Steam Store.
- Valve Corporation. (2026, March 18). DarkOrbit Reloaded on Steam. Steam Store.
- Valve Corporation. (2026, March 24). SPINNERS on Steam. Steam Store.
- Valve Corporation. (2026, January 24). Idle Sphere on Steam. Steam Store.