Free Sci-fi Games on Steam

Steam currently has 12,633 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 7/30/2025.

Looking for more? Explore other lists such as:

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™ banner

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 1,002,864 reviews on Steam. This breaks down to a total of 673,952 positive reviews and 328,912 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. 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 banner

Marvel Rivals has achieved a Player Score of 78, placing it in the #2 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 305,166 reviews on Steam. This breaks down to a total of 239,029 positive reviews and 66,137 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 12/5/2024
Developer NetEase Games
Publisher NetEase Games
Steam App Id 2767030

3. Warframe

Awaken as an unstoppable warrior and battle alongside your friends in this story-driven free-to-play online action game

Warframe banner

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 626,238 reviews on Steam. This breaks down to a total of 547,674 positive reviews and 78,564 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 banner

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 630,953 reviews on Steam. This breaks down to a total of 499,435 positive reviews and 131,518 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.

Release Date 10/1/2019
Franchise Destiny
Developer Bungie
Publisher Bungie
Steam App Id 1085660

5. 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 banner

Limbus Company has achieved a Player Score of 84, placing it in the #5 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 69,969 reviews on Steam. This breaks down to a total of 59,302 positive reviews and 10,667 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

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 banner

Overwatch® 2 has achieved a Player Score of 25, placing it in the #6 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 348,808 reviews on Steam. This breaks down to a total of 85,078 positive reviews and 263,730 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. OBS Studio

Free and open-source software for video recording and live streaming

OBS Studio banner

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 39,499 reviews on Steam. This breaks down to a total of 37,596 positive reviews and 1,903 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. Mecha BREAK

Squad up in Mecha BREAK, a multiplayer third-person shooter offering three intense game modes filled with ground and aerial combat. Pilot your Striker into the breach and neutralize enemies. Are you ready for the ultimate showdown?

Mecha BREAK banner

Mecha BREAK has achieved a Player Score of 60, placing it in the #8 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 22,118 reviews on Steam. This breaks down to a total of 13,358 positive reviews and 8,760 negative reviews — making it "Mixed" 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

9. 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 banner

SCP: Secret Laboratory has achieved a Player Score of 90, placing it in the #9 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 217,273 reviews on Steam. This breaks down to a total of 198,549 positive reviews and 18,724 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. 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 banner

The First Descendant has achieved a Player Score of 57, placing it in the #10 spot for the best free Sci-fi games. Its score was calculated by analyzing a total of 104,936 reviews on Steam. This breaks down to a total of 59,594 positive reviews and 45,342 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.

ImageName
Actions
Apex Legends™ steam charts
140,679
11/5/2020
67
Free
Steam Charts
Marvel Rivals steam charts
58,300
12/5/2024
78
Free
Steam Charts
Warframe steam charts
56,251
3/25/2013
87
Free
Steam Charts
Destiny 2 steam charts
38,906
10/1/2019
79
Free
Steam Charts
Limbus Company steam charts
33,052
2/26/2023
84
Free
Steam Charts
Overwatch® 2 steam charts
22,206
8/10/2023
25
Free
Steam Charts
OBS Studio steam charts
21,719
3/21/2022
93
Free
Steam Charts
Mecha BREAK steam charts
12,131
7/2/2025
60
Free
Steam Charts
SCP: Secret Laboratory steam charts
8,683
12/29/2017
90
Free
Steam Charts
The First Descendant steam charts
7,297
6/30/2024
57
Free
Steam Charts
Unnamed Space Idle steam charts
5,331
7/27/2023
89
Free
Steam Charts
Terminull Brigade™ steam charts
5,090
7/29/2025
58
Free
Steam Charts
EVE Online steam charts
3,715
12/15/2010
73
Free
Steam Charts
Strinova steam charts
3,582
11/21/2024
74
Free
Steam Charts
STAR WARS™: The Old Republic™ steam charts
3,540
7/21/2020
88
Free
Steam Charts
Cell to Singularity - Evolution Never Ends steam charts
2,972
11/3/2021
88
Free
Steam Charts
FragPunk steam charts
2,691
3/6/2025
72
Free
Steam Charts
BLEACH Brave Souls steam charts
2,302
8/18/2020
86
Free
Steam Charts
ヘブンバーンズレッド steam charts
2,049
8/10/2022
63
Free
Steam Charts
Stay Out steam charts
1,547
11/27/2019
65
Free
Steam Charts
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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 30). Steam Store. Steam Store.
  • Valve Corporation. (2025, July 30). Apex Legends™ on Steam. Steam Store.
  • Valve Corporation. (2025, July 31). Marvel Rivals on Steam. Steam Store.
  • Valve Corporation. (2025, August 1). Warframe on Steam. Steam Store.
  • Valve Corporation. (2025, August 2). Destiny 2 on Steam. Steam Store.
  • Valve Corporation. (2025, August 1). Limbus Company on Steam. Steam Store.
  • Valve Corporation. (2025, August 1). Overwatch® 2 on Steam. Steam Store.
  • Valve Corporation. (2025, August 2). OBS Studio on Steam. Steam Store.
  • Valve Corporation. (2025, August 1). Mecha BREAK on Steam. Steam Store.
  • Valve Corporation. (2025, August 2). SCP: Secret Laboratory on Steam. Steam Store.
  • Valve Corporation. (2025, July 25). The First Descendant on Steam. Steam Store.

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