Free Sci-fi Games on Steam
Steam currently has 9,569 Sci-fi 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 Sci-fi game rankings were last updated on 6/13/2024.
Looking for more? Explore other lists such as:
- Best sci-fi games on Steam
- Best sci-fi Steam Deck games
- Best sci-fi Steam games for Mac OS
- Best sci-fi Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
1. Destiny 2
Destiny 2 is an action MMO with a single evolving world that you and your friends can join anytime, anywhere, absolutely free.
Destiny 2 holds the #1 spot for "best free Sci-fi game on Steam" with a Player Score of 80. Its score was calculated by analyzing a total of 600,837 reviews on Steam. This breaks down to a total of 483,430 positive reviews and 117,407 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Destiny 2 on the Steam Deck.
2. Apex Legends™
Apex Legends is the award-winning, free-to-play Hero Shooter from Respawn Entertainment. Master an ever-growing roster of legendary characters with powerful abilities, and experience strategic squad play and innovative gameplay in the next evolution of Hero Shooter and Battle Royale.
Apex Legends™ has achieved a Player Score of 77, placing it in the #2 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 833,575 reviews on Steam. This breaks down to a total of 647,405 positive reviews and 186,170 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 Apex Legends™ on the Steam Deck (though some functionality may be limited).
| Release Date | 11/5/2020 |
| Franchise | Apex Legends Official |
| Developers | |
| Publisher | Electronic Arts |
| Steam App Id | 1172470 |
3. Crab Game
Crab Game is a First-Person Multiplayer game where you play through several different minigames based on children's games, until only one player stands victorious.
Crab Game has achieved a Player Score of 91, placing it in the #3 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 150,807 reviews on Steam. This breaks down to a total of 138,552 positive reviews and 12,255 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 Crab Game on the Steam Deck (though some functionality may be limited).
4. Warframe
Awaken as an unstoppable warrior and battle alongside your friends in this story-driven free-to-play online action game
Warframe has achieved a Player Score of 86, placing it in the #4 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 578,584 reviews on Steam. This breaks down to a total of 504,181 positive reviews and 74,403 negative reviews — making it "Very 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 | 3/25/2013 |
| Developer | Digital Extremes |
| Publisher | Digital Extremes |
| Steam App Id | 230410 |
5. Overwatch® 2
Overwatch 2 is a critically acclaimed, team-based shooter game set in an optimistic future with an evolving roster of heroes. Team up with friends and jump in today.
Overwatch® 2 has achieved a Player Score of 19, placing it in the #5 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 271,532 reviews on Steam. This breaks down to a total of 50,787 positive reviews and 220,745 negative reviews — making it "Overwhelmingly Negative" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Overwatch® 2 on the Steam Deck (though some functionality may be limited).
| Release Date | 8/10/2023 |
| Franchise | Blizzard |
| Developer | Blizzard Entertainment, Inc. |
| Publisher | Blizzard Entertainment, Inc. |
| Steam App Id | 2357570 |
6. Limbus Company
As the Executive Manager of Limbus Company, lead your group of twelve Sinners, venture into the buried facilities of Lobotomy Corporation, and lay claim on the Golden Boughs.
Limbus Company has achieved a Player Score of 82, placing it in the #6 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 32,642 reviews on Steam. This breaks down to a total of 27,180 positive reviews and 5,462 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Limbus Company on the Steam Deck (though some functionality may be limited).
| Release Date | 2/26/2023 |
| Developer | ProjectMoon |
| Publisher | ProjectMoon |
| Steam App Id | 1973530 |
7. OBS Studio
Free and open-source software for video recording and live streaming
OBS Studio has achieved a Player Score of 93, placing it in the #7 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 22,955 reviews on Steam. This breaks down to a total of 21,930 positive reviews and 1,025 negative reviews — making it "Overwhelmingly Positive" 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 OBS Studio on the Steam Deck.
| Release Date | 3/21/2022 |
| Developer | OBS Project |
| Publisher | OBS Project |
| Steam App Id | 1905180 |
8. STAR WARS™: The Old Republic™
STAR WARS™: The Old Republic™ is a free-to-play MMORPG that puts you at the center of your own story-driven saga. Play as a Jedi, Sith, Bounty Hunter, or one of many other iconic STAR WARS roles in the galaxy far, far away over three thousand years before the classic films.
STAR WARS™: The Old Republic™ has achieved a Player Score of 88, placing it in the #8 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 61,024 reviews on Steam. This breaks down to a total of 54,811 positive reviews and 6,213 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play STAR WARS™: The Old Republic™ on the Steam Deck (though some functionality may be limited).
| Release Date | 7/21/2020 |
| Developers | |
| Publisher | Electronic Arts |
| Steam App Id | 1286830 |
9. EVE Online
EVE Online is a free-to-play community driven space MMO where players can choose their own path from countless different options. Experience space exploration, immense PvP and PvE battles, mining, industry and a thriving player economy in an ever-expanding sandbox.
EVE Online has achieved a Player Score of 73, placing it in the #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 33,902 reviews on Steam. This breaks down to a total of 25,122 positive reviews and 8,780 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).
10. 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 has achieved a Player Score of 89, placing it in the #10 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 1,469 reviews on Steam. This breaks down to a total of 1,371 positive reviews and 98 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play Unnamed Space Idle on the Steam Deck (though some functionality may be limited).
| Release Date | 7/27/2023 |
| Developer | Sylv |
| Publishers | |
| Steam App Id | 2471100 |
More Free Sci-fi Games
Explore even more rankings for the 100 best free Sci-fi games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
 | 155,034 | 10/1/2019 | 80 | Free | Steam Charts | |
 | 70,639 | 11/5/2020 | 77 | Free | Steam Charts | |
 | 54,743 | 10/29/2021 | 91 | Free | Steam Charts | |
 | 28,022 | 3/25/2013 | 86 | Free | Steam Charts | |
 | 21,013 | 8/10/2023 | 19 | Free | Steam Charts | |
 | 9,178 | 2/26/2023 | 82 | Free | Steam Charts | |
 | 6,459 | 3/21/2022 | 93 | Free | Steam Charts | |
 | 4,317 | 7/21/2020 | 88 | Free | Steam Charts | |
 | 3,344 | 12/15/2010 | 73 | Free | Steam Charts | |
 | 3,296 | 7/27/2023 | 89 | Free | Steam Charts | |
 | 2,893 | 11/3/2021 | 88 | Free | Steam Charts | |
 | 2,827 | 12/29/2017 | 91 | Free | Steam Charts | |
 | 2,705 | 11/15/2021 | 70 | Free | Steam Charts | |
 | 2,409 | 12/1/2022 | 74 | Free | Steam Charts | |
 | 1,895 | 8/5/2020 | 70 | Free | Steam Charts | |
 | 1,603 | 8/18/2020 | 86 | Free | Steam Charts | |
 | 1,503 | 9/21/2023 | 78 | Free | Steam Charts | |
 | 1,112 | 1/31/2012 | 77 | Free | Steam Charts | |
 | 1,094 | 5/27/2016 | 83 | Free | Steam Charts | |
 | 1,040 | 8/10/2022 | 84 | 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. (2024, June 13). Steam Store. Steam Store.
- Valve Corporation. (2024, June 13). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2024, June 13). Apex Legends™ on Steam. Steam Store.
- Valve Corporation. (2024, June 7). Crab Game on Steam. Steam Store.
- Valve Corporation. (2024, June 10). Warframe on Steam. Steam Store.
- Valve Corporation. (2024, June 13). Overwatch® 2 on Steam. Steam Store.
- Valve Corporation. (2024, June 13). Limbus Company on Steam. Steam Store.
- Valve Corporation. (2024, June 13). OBS Studio on Steam. Steam Store.
- Valve Corporation. (2024, June 4). STAR WARS™: The Old Republic™ on Steam. Steam Store.
- Valve Corporation. (2024, June 13). EVE Online on Steam. Steam Store.
- Valve Corporation. (2024, June 8). Unnamed Space Idle on Steam. Steam Store.