Free Sci-fi Games on Steam
Steam currently has 13,868 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 1/8/2026.
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 67. Its score was calculated by analyzing a total of 1,026,415 reviews on Steam. This breaks down to a total of 692,256 positive reviews and 334,159 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 |
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 646,352 reviews on Steam. This breaks down to a total of 565,884 positive reviews and 80,468 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. 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 85, placing it in the #3 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 88,868 reviews on Steam. This breaks down to a total of 76,853 positive reviews and 12,015 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 |
4. 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 has achieved a Player Score of 77, placing it in the #4 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 356,328 reviews on Steam. This breaks down to a total of 275,826 positive reviews and 80,502 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 |
5. 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 #5 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 45,886 reviews on Steam. This breaks down to a total of 43,691 positive reviews and 2,195 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 |
6. 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 27, placing it in the #6 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 366,172 reviews on Steam. This breaks down to a total of 95,923 positive reviews and 270,249 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 |
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 77, placing it in the #7 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 642,535 reviews on Steam. This breaks down to a total of 498,754 positive reviews and 143,781 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. The First Descendant
The First Descendant is a third-person looter shooter powered by Unreal Engine 5. Become a Descendant. Fight for the survival of humanity. Descendants have unique abilities to tackle both solo and co-op missions. Up to 4 players use varied mechanics to defeat giant bosses. BE THE FIRST DESCENDANT!
The First Descendant has achieved a Player Score of 57, placing it in the #8 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 108,835 reviews on Steam. This breaks down to a total of 62,201 positive reviews and 46,634 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 The First Descendant on the Steam Deck.
| Release Date | 6/30/2024 |
| Developer | NEXON Games Co., Ltd. |
| Publisher | NEXON |
| Steam App Id | 2074920 |
9. 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 #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 3,786 reviews on Steam. This breaks down to a total of 3,515 positive reviews and 271 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 |
10. SCP: Secret Laboratory
Deep within a secure underground facility, a sudden containment breach allows many of the secured anomalies to escape from their chambers. Assist the Foundation in re-securing the facility, help the Insurgency in their goal to capture it, or wreak havoc as an SCP in a frantic bid to escape.
SCP: Secret Laboratory has achieved a Player Score of 90, placing it in the #10 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 225,339 reviews on Steam. This breaks down to a total of 205,592 positive reviews and 19,747 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 SCP: Secret Laboratory on the Steam Deck (though some functionality may be limited).
| Release Date | 12/29/2017 |
| Developer | Northwood Studios |
| Publisher | Northwood Studios |
| Steam App Id | 700330 |
More Free Sci-fi Games
Explore even more rankings for the 100 best free Sci-fi games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 77,093 | 11/5/2020 | 67 | Free | Steam Charts | |
| 62,286 | 3/25/2013 | 87 | Free | Steam Charts | |
| 40,177 | 2/26/2023 | 85 | Free | Steam Charts | |
| 37,333 | 12/6/2024 | 77 | Free | Steam Charts | |
| 16,818 | 3/21/2022 | 93 | Free | Steam Charts | |
| 15,328 | 8/10/2023 | 27 | Free | Steam Charts | |
| 9,488 | 10/1/2019 | 77 | Free | Steam Charts | |
| 3,915 | 6/30/2024 | 57 | Free | Steam Charts | |
| 3,823 | 7/27/2023 | 89 | Free | Steam Charts | |
| 3,703 | 12/29/2017 | 90 | Free | Steam Charts | |
 | 3,648 | 11/3/2021 | 88 | Free | Steam Charts | |
 | 3,427 | 12/16/2010 | 73 | Free | Steam Charts | |
 | 3,342 | 10/3/2025 | 88 | Free | Steam Charts | |
 | 2,838 | 7/17/2025 | 54 | Free | Steam Charts | |
 | 2,390 | 7/21/2020 | 88 | Free | Steam Charts | |
 | 1,780 | 11/21/2024 | 74 | Free | Steam Charts | |
 | 1,636 | 11/27/2019 | 67 | Free | Steam Charts | |
 | 1,367 | 7/2/2025 | 60 | Free | Steam Charts | |
 | 1,290 | 4/4/2018 | 60 | Free | Steam Charts | |
 | 1,245 | 8/10/2022 | 60 | 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, January 8). Steam Store. Steam Store.
- Valve Corporation. (2026, January 8). Apex Legends™ on Steam. Steam Store.
- Valve Corporation. (2026, January 7). Warframe on Steam. Steam Store.
- Valve Corporation. (2026, January 8). Limbus Company on Steam. Steam Store.
- Valve Corporation. (2026, January 8). Marvel Rivals on Steam. Steam Store.
- Valve Corporation. (2026, January 9). OBS Studio on Steam. Steam Store.
- Valve Corporation. (2026, January 8). Overwatch® 2 on Steam. Steam Store.
- Valve Corporation. (2026, January 8). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2026, January 8). The First Descendant on Steam. Steam Store.
- Valve Corporation. (2025, December 28). Unnamed Space Idle on Steam. Steam Store.
- Valve Corporation. (2026, January 8). SCP: Secret Laboratory on Steam. Steam Store.