Free Sci-fi Games on Steam
Steam currently has 13,171 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 10/15/2025.
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
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1. Marvel Rivals
Marvel Rivals is a Super Hero Team-Based PVP Shooter! Assemble an all-star Marvel squad, devise countless strategies by combining powers to form unique Team-Up skills and fight in destructible, ever-changing battlefields across the continually evolving Marvel universe!
Marvel Rivals holds the #1 spot for "best free Sci-fi game on Steam" with a Player Score of 76. Its score was calculated by analyzing a total of 322,474 reviews on Steam. This breaks down to a total of 248,496 positive reviews and 73,978 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 Marvel Rivals on the Steam Deck (though some functionality may be limited).
| Release Date | 12/6/2024 |
| Developer | NetEase Games |
| Publisher | NetEase Games |
| Steam App Id | 2767030 |
2. 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 87, placing it in the #2 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 632,730 reviews on Steam. This breaks down to a total of 553,741 positive reviews and 78,989 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 |
3. Blue Protocol: Star Resonance
Blue Protocol: Star Resonance expands the Blue Protocol universe with a vibrant MMORPG experience. Create your own hero, team up for strategic raids, or simply relax and have fun with friends fishing, crafting, and endless exploration. Adventure awaits!
Blue Protocol: Star Resonance has achieved a Player Score of 49, placing it in the #3 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 12,322 reviews on Steam. This breaks down to a total of 6,058 positive reviews and 6,264 negative reviews — making it "Mixed" 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 | 10/9/2025 |
| Developer | Shanghai Bokura Network Technology Co.Ltd |
| Publisher | A Plus |
| Steam App Id | 3681810 |
4. 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 67, placing it in the #4 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 1,011,972 reviews on Steam. This breaks down to a total of 680,137 positive reviews and 331,835 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 Apex Legends™ on the Steam Deck.
| Release Date | 11/5/2020 |
| Franchise | Apex Legends Official |
| Developers | |
| Publisher | Electronic Arts |
| Steam App Id | 1172470 |
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 26, placing it in the #5 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 356,978 reviews on Steam. This breaks down to a total of 90,242 positive reviews and 266,736 negative reviews — making it "Mostly 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 84, placing it in the #6 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 80,318 reviews on Steam. This breaks down to a total of 68,609 positive reviews and 11,709 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. 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 78, placing it in the #7 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 638,032 reviews on Steam. This breaks down to a total of 498,342 positive reviews and 139,690 negative reviews — making it "Mostly 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.
8. 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 #8 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 42,233 reviews on Steam. This breaks down to a total of 40,193 positive reviews and 2,040 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 |
9. Upload Labs
A sci-fi management game where you build and optimize your computer's system from the ground up. Connect and configure interconnected nodes to efficiently download, process, and upload files. Manage your setup, solve system challenges, and become the ultimate system architect
Upload Labs has achieved a Player Score of 80, placing it in the #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 1,017 reviews on Steam. This breaks down to a total of 857 positive reviews and 160 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 10/3/2025 |
| Developer | EnigmaDev Studios |
| Publisher | EnigmaDev Studios |
| Steam App Id | 3606890 |
10. Off The Grid
Welcome to Off The Grid, the next-gen free to play Battle Royale from visionary director Neill Blomkamp. Set in a near-future world where contestants are cybernetically augmented and dropped into televised bloodsport. Death is temporary, but fame is forever.
Off The Grid has achieved a Player Score of 55, placing it in the #10 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 1,482 reviews on Steam. This breaks down to a total of 829 positive reviews and 653 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Off The Grid on the Steam Deck (though some functionality may be limited).
| Release Date | 7/17/2025 |
| Developer | Gunzilla Games |
| Publisher | Gunzilla Games |
| Steam App Id | 3659280 |
More Free Sci-fi Games
Explore even more rankings for the 100 best free Sci-fi games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 75,050 | 12/6/2024 | 76 | Free | Steam Charts | |
| 58,558 | 3/25/2013 | 87 | Free | Steam Charts | |
| 51,169 | 10/9/2025 | 49 | Free | Steam Charts | |
| 46,317 | 11/5/2020 | 67 | Free | Steam Charts | |
| 31,428 | 8/10/2023 | 26 | Free | Steam Charts | |
| 26,472 | 2/26/2023 | 84 | Free | Steam Charts | |
| 13,804 | 10/1/2019 | 78 | Free | Steam Charts | |
| 10,838 | 3/21/2022 | 93 | Free | Steam Charts | |
| 7,080 | 10/3/2025 | 80 | Free | Steam Charts | |
| 6,971 | 7/17/2025 | 55 | Free | Steam Charts | |
 | 3,475 | 6/30/2024 | 57 | Free | Steam Charts | |
 | 3,312 | 7/27/2023 | 89 | Free | Steam Charts | |
 | 3,180 | 9/10/2025 | 60 | Free | Steam Charts | |
 | 2,705 | 11/15/2021 | 69 | Free | Steam Charts | |
 | 2,620 | 7/21/2020 | 88 | Free | Steam Charts | |
 | 2,439 | 12/15/2010 | 72 | Free | Steam Charts | |
 | 2,331 | 9/19/2025 | 49 | Free | Steam Charts | |
 | 2,312 | 11/3/2021 | 88 | Free | Steam Charts | |
 | 2,088 | 7/2/2025 | 59 | Free | Steam Charts | |
 | 2,060 | 8/20/2024 | 71 | 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, October 15). Steam Store. Steam Store.
- Valve Corporation. (2025, October 15). Marvel Rivals on Steam. Steam Store.
- Valve Corporation. (2025, October 15). Warframe on Steam. Steam Store.
- Valve Corporation. (2025, October 16). Blue Protocol: Star Resonance on Steam. Steam Store.
- Valve Corporation. (2025, October 16). Apex Legends™ on Steam. Steam Store.
- Valve Corporation. (2025, October 14). Overwatch® 2 on Steam. Steam Store.
- Valve Corporation. (2025, October 16). Limbus Company on Steam. Steam Store.
- Valve Corporation. (2025, October 15). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2025, October 8). OBS Studio on Steam. Steam Store.
- Valve Corporation. (2025, October 15). Upload Labs on Steam. Steam Store.
- Valve Corporation. (2025, October 15). Off The Grid on Steam. Steam Store.