Free Sci-fi Games on Steam
Steam currently has 12,021 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 5/10/2025.
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 80. Its score was calculated by analyzing a total of 277,302 reviews on Steam. This breaks down to a total of 222,617 positive reviews and 54,685 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 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 991,255 reviews on Steam. This breaks down to a total of 665,532 positive reviews and 325,723 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 616,939 reviews on Steam. This breaks down to a total of 539,916 positive reviews and 77,023 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 79, placing it in the #4 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 623,876 reviews on Steam. This breaks down to a total of 496,893 positive reviews and 126,983 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.
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 24, placing it in the #5 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 340,666 reviews on Steam. This breaks down to a total of 80,512 positive reviews and 260,154 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. 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 90, placing it in the #6 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 152,476 reviews on Steam. This breaks down to a total of 139,605 positive reviews and 12,871 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).
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 35,952 reviews on Steam. This breaks down to a total of 34,251 positive reviews and 1,701 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 85, placing it in the #8 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 56,945 reviews on Steam. This breaks down to a total of 48,927 positive reviews and 8,018 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. FragPunk
FragPunk is a thrilling 5v5 hero shooter where Shard Cards allow you to break the rules of combat and ensure that no two rounds are ever the same. Get ready to unleash your skills!
FragPunk has achieved a Player Score of 72, placing it in the #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 36,980 reviews on Steam. This breaks down to a total of 27,168 positive reviews and 9,812 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 FragPunk on the Steam Deck.
| Release Date | 3/6/2025 |
| Developer | Bad Guitar Studio |
| Publisher | Bad Guitar Studio |
| Steam App Id | 2943650 |
10. 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 #10 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 67,113 reviews on Steam. This breaks down to a total of 60,125 positive reviews and 6,988 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 |
More Free Sci-fi Games
Explore even more rankings for the 100 best free Sci-fi games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 129,951 | 12/6/2024 | 80 | Free | Steam Charts | |
| 117,058 | 11/5/2020 | 67 | Free | Steam Charts | |
| 44,781 | 3/25/2013 | 87 | Free | Steam Charts | |
| 43,565 | 10/1/2019 | 79 | Free | Steam Charts | |
| 28,229 | 8/10/2023 | 24 | Free | Steam Charts | |
| 21,948 | 10/29/2021 | 90 | Free | Steam Charts | |
| 12,212 | 3/21/2022 | 93 | Free | Steam Charts | |
| 10,849 | 2/26/2023 | 85 | Free | Steam Charts | |
| 8,465 | 3/6/2025 | 72 | Free | Steam Charts | |
| 6,436 | 7/21/2020 | 88 | Free | Steam Charts | |
 | 4,593 | 7/27/2023 | 89 | Free | Steam Charts | |
 | 4,411 | 6/30/2024 | 56 | Free | Steam Charts | |
 | 4,159 | 12/16/2010 | 73 | Free | Steam Charts | |
 | 4,092 | 12/29/2017 | 90 | Free | Steam Charts | |
 | 3,148 | 11/15/2021 | 69 | Free | Steam Charts | |
 | 2,846 | 11/3/2021 | 88 | Free | Steam Charts | |
 | 2,379 | 11/21/2024 | 75 | Free | Steam Charts | |
 | 2,151 | 8/20/2024 | 72 | Free | Steam Charts | |
 | 1,517 | 4/4/2018 | 60 | Free | Steam Charts | |
 | 1,408 | 8/10/2022 | 83 | 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, May 10). Steam Store. Steam Store.
- Valve Corporation. (2025, May 10). Marvel Rivals on Steam. Steam Store.
- Valve Corporation. (2025, May 9). Apex Legends™ on Steam. Steam Store.
- Valve Corporation. (2025, May 9). Warframe on Steam. Steam Store.
- Valve Corporation. (2025, May 10). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2025, May 9). Overwatch® 2 on Steam. Steam Store.
- Valve Corporation. (2025, March 16). Crab Game on Steam. Steam Store.
- Valve Corporation. (2025, May 10). OBS Studio on Steam. Steam Store.
- Valve Corporation. (2025, May 9). Limbus Company on Steam. Steam Store.
- Valve Corporation. (2025, May 9). FragPunk on Steam. Steam Store.
- Valve Corporation. (2025, May 4). STAR WARS™: The Old Republic™ on Steam. Steam Store.