Free Sci-fi Games on Steam
Steam currently has 10,637 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 11/3/2024.
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 68. Its score was calculated by analyzing a total of 957,676 reviews on Steam. This breaks down to a total of 650,763 positive reviews and 306,913 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. 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 #2 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 151,396 reviews on Steam. This breaks down to a total of 138,929 positive reviews and 12,467 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).
3. 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 #3 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 596,806 reviews on Steam. This breaks down to a total of 521,128 positive reviews and 75,678 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 |
4. 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 #4 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 614,498 reviews on Steam. This breaks down to a total of 491,899 positive reviews and 122,599 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.
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 22, placing it in the #5 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 310,379 reviews on Steam. This breaks down to a total of 65,221 positive reviews and 245,158 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. 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 28,332 reviews on Steam. This breaks down to a total of 27,026 positive reviews and 1,306 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. 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 55, placing it in the #7 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 90,347 reviews on Steam. This breaks down to a total of 49,625 positive reviews and 40,722 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 |
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 84, placing it in the #8 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 40,388 reviews on Steam. This breaks down to a total of 34,579 positive reviews and 5,809 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. SCP: Secret Laboratory
Deep within the SCP Foundation during a containment breach, many of the anomalies have bypassed security and escaped from their chambers - without peaceful intentions. Become site personnel, a re-containment agent, or an anomalous entity and fight to take control of or escape the facility!
SCP: Secret Laboratory has achieved a Player Score of 91, placing it in the #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 202,346 reviews on Steam. This breaks down to a total of 185,268 positive reviews and 17,078 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 |
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 21,705 reviews on Steam. This breaks down to a total of 19,557 positive reviews and 2,148 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 | ||||
|---|---|---|---|---|---|---|
| 68,036 | 11/5/2020 | 68 | Free | Steam Charts | |
| 52,145 | 10/29/2021 | 91 | Free | Steam Charts | |
| 49,187 | 3/25/2013 | 87 | Free | Steam Charts | |
| 29,766 | 10/1/2019 | 80 | Free | Steam Charts | |
| 27,312 | 8/10/2023 | 22 | Free | Steam Charts | |
| 12,439 | 3/21/2022 | 93 | Free | Steam Charts | |
| 11,496 | 6/30/2024 | 55 | Free | Steam Charts | |
| 7,378 | 2/26/2023 | 84 | Free | Steam Charts | |
| 6,934 | 12/29/2017 | 91 | Free | Steam Charts | |
| 4,136 | 11/3/2021 | 88 | Free | Steam Charts | |
 | 4,039 | 12/16/2010 | 73 | Free | Steam Charts | |
 | 3,434 | 7/21/2020 | 88 | Free | Steam Charts | |
 | 2,910 | 8/18/2020 | 86 | Free | Steam Charts | |
 | 2,675 | 7/27/2023 | 88 | Free | Steam Charts | |
 | 2,016 | 7/18/2024 | 70 | Free | Steam Charts | |
 | 1,898 | 4/4/2018 | 60 | Free | Steam Charts | |
 | 1,661 | 5/27/2016 | 82 | Free | Steam Charts | |
 | 1,624 | 11/15/2021 | 70 | Free | Steam Charts | |
 | 1,535 | 8/10/2022 | 84 | Free | Steam Charts | |
 | 1,489 | 9/21/2023 | 77 | 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, November 3). Steam Store. Steam Store.
- Valve Corporation. (2024, November 3). Apex Legends™ on Steam. Steam Store.
- Valve Corporation. (2024, October 8). Crab Game on Steam. Steam Store.
- Valve Corporation. (2024, October 31). Warframe on Steam. Steam Store.
- Valve Corporation. (2024, November 4). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2024, November 3). Overwatch® 2 on Steam. Steam Store.
- Valve Corporation. (2024, November 2). OBS Studio on Steam. Steam Store.
- Valve Corporation. (2024, November 4). The First Descendant on Steam. Steam Store.
- Valve Corporation. (2024, November 2). Limbus Company on Steam. Steam Store.
- Valve Corporation. (2024, November 4). SCP: Secret Laboratory on Steam. Steam Store.
- Valve Corporation. (2024, November 4). Cell to Singularity - Evolution Never Ends on Steam. Steam Store.