Free Sci-fi Games on Steam
Steam currently has 12,404 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 7/2/2025.
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
- Best rated Steam games
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 78. Its score was calculated by analyzing a total of 295,402 reviews on Steam. This breaks down to a total of 233,349 positive reviews and 62,053 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. 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 #2 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 998,867 reviews on Steam. This breaks down to a total of 670,849 positive reviews and 328,018 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 |
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 622,902 reviews on Steam. This breaks down to a total of 544,565 positive reviews and 78,337 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. Mecha BREAK
Squad up in Mecha BREAK, a multiplayer third-person shooter offering players three game modes filled with high-octane ground and aerial combat. Pilot your Striker into the breach and take on enemies across worldwide hotspots. Ready for the ultimate showdown?
Mecha BREAK has achieved a Player Score of ?, placing it in the #4 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of undefined reviews on Steam. This breaks down to a total of undefined positive reviews and undefined negative reviews — making it "null" 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 | 7/2/2025 |
| Developers | |
| Publishers | |
| Steam App Id | 2452280 |
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 25, placing it in the #5 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 345,828 reviews on Steam. This breaks down to a total of 83,474 positive reviews and 262,354 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. 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 79, placing it in the #6 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 626,816 reviews on Steam. This breaks down to a total of 498,285 positive reviews and 128,531 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.
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 37,943 reviews on Steam. This breaks down to a total of 36,129 positive reviews and 1,814 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. 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 83, placing it in the #8 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 66,081 reviews on Steam. This breaks down to a total of 55,637 positive reviews and 10,444 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. 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 #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 68,619 reviews on Steam. This breaks down to a total of 61,466 positive reviews and 7,153 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 |
| Franchise | BioWare EA |
| Developers | |
| Publisher | Electronic Arts |
| Steam App Id | 1286830 |
10. 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 56, placing it in the #10 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 104,161 reviews on Steam. This breaks down to a total of 58,958 positive reviews and 45,203 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 |
More Free Sci-fi Games
Explore even more rankings for the 100 best free Sci-fi games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 75,916 | 12/6/2024 | 78 | Free | Steam Charts | |
| 53,788 | 11/5/2020 | 67 | Free | Steam Charts | |
| 47,784 | 3/25/2013 | 87 | Free | Steam Charts | |
| 39,679 | 7/2/2025 | ??? | Free | Steam Charts | |
| 25,555 | 8/10/2023 | 25 | Free | Steam Charts | |
| 25,363 | 10/1/2019 | 79 | Free | Steam Charts | |
| 14,408 | 3/21/2022 | 93 | Free | Steam Charts | |
| 11,693 | 2/26/2023 | 83 | Free | Steam Charts | |
| 5,943 | 7/21/2020 | 88 | Free | Steam Charts | |
| 5,495 | 6/30/2024 | 56 | Free | Steam Charts | |
 | 5,255 | 7/27/2023 | 89 | Free | Steam Charts | |
 | 4,440 | 12/29/2017 | 90 | Free | Steam Charts | |
 | 3,788 | 12/16/2010 | 73 | Free | Steam Charts | |
 | 3,597 | 3/6/2025 | 73 | Free | Steam Charts | |
 | 2,714 | 5/22/2025 | 61 | Free | Steam Charts | |
 | 2,436 | 11/21/2024 | 74 | Free | Steam Charts | |
 | 2,345 | 11/3/2021 | 88 | Free | Steam Charts | |
 | 2,120 | 11/15/2021 | 69 | Free | Steam Charts | |
 | 2,009 | 2/14/2025 | 85 | Free | Steam Charts | |
 | 1,766 | 8/18/2020 | 86 | 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, July 2). Steam Store. Steam Store.
- Valve Corporation. (2025, July 2). Marvel Rivals on Steam. Steam Store.
- Valve Corporation. (2025, July 2). Apex Legends™ on Steam. Steam Store.
- Valve Corporation. (2025, June 27). Warframe on Steam. Steam Store.
- Valve Corporation. (2025, July 2). Mecha BREAK on Steam. Steam Store.
- Valve Corporation. (2025, July 2). Overwatch® 2 on Steam. Steam Store.
- Valve Corporation. (2025, July 2). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2025, July 2). OBS Studio on Steam. Steam Store.
- Valve Corporation. (2025, June 30). Limbus Company on Steam. Steam Store.
- Valve Corporation. (2025, July 2). STAR WARS™: The Old Republic™ on Steam. Steam Store.
- Valve Corporation. (2025, July 2). The First Descendant on Steam. Steam Store.