Free Space Sim Games on Steam
Steam currently has 1,417 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 2/4/2026.
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 38,112 reviews on Steam. This breaks down to a total of 28,019 positive reviews and 10,093 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 1,097 reviews on Steam. This breaks down to a total of 824 positive reviews and 273 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. 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 #3 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 205 reviews on Steam. This breaks down to a total of 105 positive reviews and 100 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 |
4. 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 #4 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 6,905 reviews on Steam. This breaks down to a total of 6,377 positive reviews and 528 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 |
5. 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 #5 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 2,887 reviews on Steam. This breaks down to a total of 2,122 positive reviews and 765 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.
6. Infinite Lagrange
Different forces strive to make their own way in the space and desire the control of the Lagrange system- a gigantic transportation network. You, emerging as one of the force leaders, find yourself in a time of challenges and opportunities.
Infinite Lagrange has achieved a Player Score of 57, placing it in the #6 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 993 reviews on Steam. This breaks down to a total of 572 positive reviews and 421 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 Infinite Lagrange on the Steam Deck.
| Release Date | 10/8/2021 |
| Developer | NetEase Games |
| Publisher | NetEase Games |
| Steam App Id | 1755920 |
7. 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 66, placing it in the #7 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 117 reviews on Steam. This breaks down to a total of 83 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 |
8. 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 #8 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 15,023 reviews on Steam. This breaks down to a total of 10,916 positive reviews and 4,107 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 |
9. 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 31, placing it in the #9 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 307 reviews on Steam. This breaks down to a total of 82 positive reviews and 225 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 |
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 309 reviews on Steam. This breaks down to a total of 153 positive reviews and 156 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 | ||||
|---|---|---|---|---|---|---|
| 3,560 | 12/15/2010 | 73 | Free | Steam Charts | |
| 1,030 | 8/6/2025 | 72 | Free | Steam Charts | |
| 157 | 10/22/2024 | 51 | Free | Steam Charts | |
| 118 | 10/30/2015 | 89 | Free | Steam Charts | |
| 114 | 5/23/2023 | 71 | Free | Steam Charts | |
| 114 | 10/8/2021 | 57 | Free | Steam Charts | |
| 88 | 7/16/2024 | 66 | Free | Steam Charts | |
| 76 | 2/27/2013 | 71 | Free | Steam Charts | |
| 72 | 12/3/2025 | 31 | Free | Steam Charts | |
| 70 | 11/17/2024 | 50 | Free | Steam Charts | |
 | 64 | 7/18/2024 | 57 | Free | Steam Charts | |
 | 31 | 10/14/2024 | 65 | Free | Steam Charts | |
 | 30 | 4/20/2022 | 71 | Free | Steam Charts | |
 | 30 | 5/26/2022 | 53 | Free | Steam Charts | |
 | 27 | 5/4/2021 | 81 | Free | Steam Charts | |
 | 24 | 2/11/2024 | 84 | Free | Steam Charts | |
 | 22 | 9/22/2020 | 61 | Free | Steam Charts | |
 | 16 | 6/12/2020 | 64 | Free | Steam Charts | |
 | 14 | 1/9/2026 | 75 | Free | Steam Charts | |
 | 12 | 8/27/2025 | 29 | 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, February 4). Steam Store. Steam Store.
- Valve Corporation. (2026, February 4). EVE Online on Steam. Steam Store.
- Valve Corporation. (2026, February 6). Galaxy Idle Clicker on Steam. Steam Store.
- Valve Corporation. (2026, February 1). Nova: Space Armada on Steam. Steam Store.
- Valve Corporation. (2026, January 31). Endless Sky on Steam. Steam Store.
- Valve Corporation. (2026, February 13). Pixel Starships on Steam. Steam Store.
- Valve Corporation. (2026, February 9). Infinite Lagrange on Steam. Steam Store.
- Valve Corporation. (2026, January 11). SPINNERS on Steam. Steam Store.
- Valve Corporation. (2026, February 11). Star Conflict on Steam. Steam Store.
- Valve Corporation. (2026, February 11). DarkOrbit Reloaded on Steam. Steam Store.
- Valve Corporation. (2026, January 24). Idle Sphere on Steam. Steam Store.