Free Space Sim Games on Steam
Steam currently has 1,349 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 12/5/2025.
Looking for more? Explore other lists such as:
- Best space sim games on Steam
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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 72. Its score was calculated by analyzing a total of 37,661 reviews on Steam. This breaks down to a total of 27,667 positive reviews and 9,994 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 1,060 reviews on Steam. This breaks down to a total of 797 positive reviews and 263 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 50, placing it in the #3 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 186 reviews on Steam. This breaks down to a total of 93 positive reviews and 93 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. 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 #4 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 2,861 reviews on Steam. This breaks down to a total of 2,106 positive reviews and 755 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.
5. 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 30, placing it in the #5 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 105 reviews on Steam. This breaks down to a total of 24 positive reviews and 81 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 |
6. 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 65, placing it in the #6 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 111 reviews on Steam. This breaks down to a total of 77 positive reviews and 34 negative reviews — making it "Mixed" 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 |
7. Pizza Clicker
PIZZA CLICKER. You get dropped a pizza every 2 hours 5 times per day. Your chance to try every kind of pizza in the world and share it with friends!
Pizza Clicker has achieved a Player Score of 55, placing it in the #7 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 98 reviews on Steam. This breaks down to a total of 55 positive reviews and 43 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Pizza Clicker on the Steam Deck (though some functionality may be limited).
| Release Date | 7/18/2024 |
| Developers | |
| Publishers | |
| Steam App Id | 3068320 |
8. Idle Sphere
Stunning sphere-themed idle/incremental game. Experience simplicity's beauty.
Idle Sphere has achieved a Player Score of 51, placing it in the #8 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 300 reviews on Steam. This breaks down to a total of 152 positive reviews and 148 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 |
9. 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 #9 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 6,832 reviews on Steam. This breaks down to a total of 6,309 positive reviews and 523 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 |
10. 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 56, placing it in the #10 spot for the best free Space Sim games. Its score was calculated by analyzing a total of 968 reviews on Steam. This breaks down to a total of 551 positive reviews and 417 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 |
More Free Space Sim Games
Explore even more rankings for the 100 best free Space Sim games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 3,571 | 12/16/2010 | 72 | Free | Steam Charts | |
| 1,246 | 8/6/2025 | 72 | Free | Steam Charts | |
| 148 | 10/22/2024 | 50 | Free | Steam Charts | |
| 141 | 5/23/2023 | 71 | Free | Steam Charts | |
| 101 | 12/3/2025 | 30 | Free | Steam Charts | |
| 101 | 7/16/2024 | 65 | Free | Steam Charts | |
| 87 | 7/18/2024 | 55 | Free | Steam Charts | |
| 86 | 11/17/2024 | 51 | Free | Steam Charts | |
| 81 | 10/30/2015 | 89 | Free | Steam Charts | |
| 79 | 10/8/2021 | 56 | Free | Steam Charts | |
 | 63 | 5/26/2022 | 54 | Free | Steam Charts | |
 | 58 | 2/27/2013 | 72 | Free | Steam Charts | |
 | 38 | 10/14/2024 | 65 | Free | Steam Charts | |
 | 31 | 4/20/2022 | 72 | Free | Steam Charts | |
 | 29 | 9/22/2020 | 61 | Free | Steam Charts | |
 | 25 | 5/4/2021 | 81 | Free | Steam Charts | |
 | 23 | 8/27/2025 | 30 | Free | Steam Charts | |
 | 18 | 2/11/2024 | 84 | Free | Steam Charts | |
 | 9 | 6/12/2020 | 65 | Free | Steam Charts | |
 | 6 | 1/22/2021 | 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. (2025, December 5). Steam Store. Steam Store.
- Valve Corporation. (2025, December 5). EVE Online on Steam. Steam Store.
- Valve Corporation. (2025, December 2). Galaxy Idle Clicker on Steam. Steam Store.
- Valve Corporation. (2025, December 4). Nova: Space Armada on Steam. Steam Store.
- Valve Corporation. (2025, December 5). Pixel Starships on Steam. Steam Store.
- Valve Corporation. (2025, December 5). DarkOrbit Reloaded on Steam. Steam Store.
- Valve Corporation. (2025, November 23). SPINNERS on Steam. Steam Store.
- Valve Corporation. (2025, December 3). Pizza Clicker on Steam. Steam Store.
- Valve Corporation. (2025, November 14). Idle Sphere on Steam. Steam Store.
- Valve Corporation. (2025, November 11). Endless Sky on Steam. Steam Store.
- Valve Corporation. (2025, October 21). Infinite Lagrange on Steam. Steam Store.