Free Sci-fi Games on Steam
Steam currently has 9,412 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 5/19/2024.
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. 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™ holds the #1 spot for "best free Sci-fi game on Steam" with a Player Score of 77. Its score was calculated by analyzing a total of 826,204 reviews on Steam. This breaks down to a total of 643,720 positive reviews and 182,484 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 | 11/5/2020 |
| Franchise | Apex Legends Official |
| Developers | |
| Publisher | Electronic Arts |
| Steam App Id | 1172470 |
2. 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 has achieved a Player Score of 80, placing it in the #2 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 593,841 reviews on Steam. This breaks down to a total of 477,262 positive reviews and 116,579 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.
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 150,650 reviews on Steam. This breaks down to a total of 138,458 positive reviews and 12,192 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 575,260 reviews on Steam. This breaks down to a total of 501,529 positive reviews and 73,731 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 265,821 reviews on Steam. This breaks down to a total of 48,838 positive reviews and 216,983 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 |
| Developer | Blizzard Entertainment, Inc. |
| Publisher | Blizzard Entertainment, Inc. |
| Steam App Id | 2357570 |
6. 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 #6 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 22,110 reviews on Steam. This breaks down to a total of 21,132 positive reviews and 978 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 |
7. 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 #7 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 60,437 reviews on Steam. This breaks down to a total of 54,278 positive reviews and 6,159 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 |
8. 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 81, placing it in the #8 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 31,853 reviews on Steam. This breaks down to a total of 26,423 positive reviews and 5,430 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 |
9. Halo Infinite
From one of gaming's most iconic sagas, Halo is bigger than ever. Featuring an expansive open-world campaign and a dynamic free to play multiplayer experience.
Halo Infinite has achieved a Player Score of 70, placing it in the #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 170,705 reviews on Steam. This breaks down to a total of 120,568 positive reviews and 50,137 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 Halo Infinite on the Steam Deck (though some functionality may be limited).
| Release Date | 11/15/2021 |
| Franchise | Xbox Game Studios |
| Developer | 343 Industries |
| Publisher | Xbox Game Studios |
| Steam App Id | 1240440 |
10. Cell to Singularity - Evolution Never Ends
The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.
Cell to Singularity - Evolution Never Ends has achieved a Player Score of 88, placing it in the #10 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 20,296 reviews on Steam. This breaks down to a total of 18,366 positive reviews and 1,930 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is possible to play Cell to Singularity - Evolution Never Ends on the Steam Deck (though some functionality may be limited).
| Release Date | 11/3/2021 |
| Developer | Computer Lunch |
| Publisher | Computer Lunch |
| Steam App Id | 977400 |
More Free Sci-fi Games
Explore even more rankings for the 100 best free Sci-fi games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
 | 103,582 | 11/5/2020 | 77 | Free | Steam Charts | |
 | 90,585 | 10/1/2019 | 80 | Free | Steam Charts | |
 | 54,496 | 10/29/2021 | 91 | Free | Steam Charts | |
 | 41,947 | 3/25/2013 | 86 | Free | Steam Charts | |
 | 29,815 | 8/10/2023 | 19 | Free | Steam Charts | |
 | 7,056 | 3/21/2022 | 93 | Free | Steam Charts | |
 | 6,141 | 7/21/2020 | 88 | Free | Steam Charts | |
 | 4,482 | 2/26/2023 | 81 | Free | Steam Charts | |
 | 4,159 | 11/15/2021 | 70 | Free | Steam Charts | |
 | 4,117 | 11/3/2021 | 88 | Free | Steam Charts | |
 | 4,051 | 12/1/2022 | 75 | Free | Steam Charts | |
 | 3,971 | 7/27/2023 | 88 | Free | Steam Charts | |
 | 3,797 | 9/18/2014 | 82 | $29.99 | Steam Charts | |
 | 3,711 | 12/16/2010 | 73 | Free | Steam Charts | |
 | 3,447 | 12/29/2017 | 91 | Free | Steam Charts | |
 | 2,007 | 9/21/2023 | 78 | Free | Steam Charts | |
 | 1,999 | 8/5/2020 | 70 | Free | Steam Charts | |
 | 1,832 | 8/18/2020 | 86 | Free | Steam Charts | |
 | 1,391 | 12/25/2023 | 76 | Free | Steam Charts | |
 | 1,295 | 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, May 19). Steam Store. Steam Store.
- Valve Corporation. (2024, May 19). Apex Legends™ on Steam. Steam Store.
- Valve Corporation. (2024, May 18). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2024, May 19). Crab Game on Steam. Steam Store.
- Valve Corporation. (2024, May 10). Warframe on Steam. Steam Store.
- Valve Corporation. (2024, May 17). Overwatch® 2 on Steam. Steam Store.
- Valve Corporation. (2024, May 19). OBS Studio on Steam. Steam Store.
- Valve Corporation. (2024, April 3). STAR WARS™: The Old Republic™ on Steam. Steam Store.
- Valve Corporation. (2024, May 17). Limbus Company on Steam. Steam Store.
- Valve Corporation. (2024, May 18). Halo Infinite on Steam. Steam Store.
- Valve Corporation. (2024, May 18). Cell to Singularity - Evolution Never Ends on Steam. Steam Store.