Free Sci-fi Games on Steam
Steam currently has 10,984 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 12/13/2024.
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. 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 56,912 reviews on Steam. This breaks down to a total of 44,943 positive reviews and 11,969 negative reviews — making it "Mostly Positive" 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 | 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 600,689 reviews on Steam. This breaks down to a total of 524,840 positive reviews and 75,849 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. 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 #3 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 970,038 reviews on Steam. This breaks down to a total of 655,882 positive reviews and 314,156 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 |
4. 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 #4 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 151,470 reviews on Steam. This breaks down to a total of 138,943 positive reviews and 12,527 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).
5. 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 #5 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 616,282 reviews on Steam. This breaks down to a total of 493,037 positive reviews and 123,245 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.
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 22, placing it in the #6 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 319,576 reviews on Steam. This breaks down to a total of 69,738 positive reviews and 249,838 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. 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 82, placing it in the #7 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 45,478 reviews on Steam. This breaks down to a total of 38,059 positive reviews and 7,419 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 |
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 95,873 reviews on Steam. This breaks down to a total of 54,382 positive reviews and 41,491 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. 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 #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 29,892 reviews on Steam. This breaks down to a total of 28,524 positive reviews and 1,368 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 |
10. Strinova
Strinova is an anime-style third-person tactical competitive shooter. Switch freely between three-dimensional and two-dimensional forms in this one-of-a-kind game that offers a unique tactical shooting system for an unparalleled experience.
Strinova has achieved a Player Score of 76, placing it in the #10 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 16,772 reviews on Steam. This breaks down to a total of 13,053 positive reviews and 3,719 negative reviews — making it "Mostly Positive" 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.
More Free Sci-fi Games
Explore even more rankings for the 100 best free Sci-fi games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 393,854 | 12/6/2024 | 78 | Free | Steam Charts | |
| 81,369 | 3/25/2013 | 87 | Free | Steam Charts | |
| 51,120 | 11/5/2020 | 67 | Free | Steam Charts | |
| 38,917 | 10/29/2021 | 91 | Free | Steam Charts | |
| 23,716 | 10/1/2019 | 79 | Free | Steam Charts | |
| 22,514 | 8/10/2023 | 22 | Free | Steam Charts | |
| 15,919 | 2/26/2023 | 82 | Free | Steam Charts | |
| 14,752 | 6/30/2024 | 57 | Free | Steam Charts | |
| 8,323 | 3/21/2022 | 93 | Free | Steam Charts | |
| 7,187 | 11/21/2024 | 76 | Free | Steam Charts | |
 | 4,371 | 7/21/2020 | 88 | Free | Steam Charts | |
 | 3,696 | 8/10/2022 | 84 | Free | Steam Charts | |
 | 3,490 | 7/27/2023 | 89 | Free | Steam Charts | |
 | 3,108 | 12/16/2010 | 73 | Free | Steam Charts | |
 | 3,079 | 11/3/2021 | 88 | Free | Steam Charts | |
 | 2,871 | 11/15/2021 | 70 | Free | Steam Charts | |
 | 2,680 | 12/29/2017 | 91 | Free | Steam Charts | |
 | 1,628 | 8/18/2020 | 86 | Free | Steam Charts | |
 | 1,335 | 8/5/2020 | 69 | Free | Steam Charts | |
 | 1,306 | 7/18/2024 | 74 | 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, December 13). Steam Store. Steam Store.
- Valve Corporation. (2024, December 13). Marvel Rivals on Steam. Steam Store.
- Valve Corporation. (2024, December 13). Warframe on Steam. Steam Store.
- Valve Corporation. (2024, December 13). Apex Legends™ on Steam. Steam Store.
- Valve Corporation. (2024, October 8). Crab Game on Steam. Steam Store.
- Valve Corporation. (2024, December 12). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2024, December 13). Overwatch® 2 on Steam. Steam Store.
- Valve Corporation. (2024, December 13). Limbus Company on Steam. Steam Store.
- Valve Corporation. (2024, December 13). The First Descendant on Steam. Steam Store.
- Valve Corporation. (2024, December 14). OBS Studio on Steam. Steam Store.
- Valve Corporation. (2024, December 13). Strinova on Steam. Steam Store.