Best Sci-fi Games on Steam

Steam currently has 10,805 Sci-fi games available to download and play. Explore our list of the best picks ranked by Player Score. Our Player Score rankings are calculated directly from reviews left on the Steam store and will be updated in real-time as more players leave their feedback. Sci-fi game rankings were last updated on 10/18/2024.

Looking for more? Explore other lists such as:

1. Portal 2

The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!

Portal 2 banner

Portal 2 holds the #1 spot for "best Sci-fi game on Steam" with a Player Score of 98. Its score was calculated by analyzing a total of 411,387 reviews on Steam. This breaks down to a total of 406,001 positive reviews and 5,386 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 to play and can be played and ran on both Windows and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $9.99
Release Date 4/18/2011
Franchise Valve
Developer Valve
Publisher Valve
Steam App Id 620

2. Portal

Portal™ is a new single player game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative new games on the horizon and will offer gamers hours of unique gameplay.

Portal banner

Portal has achieved a Player Score of 97, placing it in the #2 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 167,667 reviews on Steam. This breaks down to a total of 165,098 positive reviews and 2,569 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 to play and can be played and ran on both Windows and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $9.99
Release Date 10/10/2007
Developer Valve
Publisher Valve
Steam App Id 400

3. Half-Life: Alyx

Half-Life: Alyx is Valve’s VR return to the Half-Life series. It’s the story of an impossible fight against a vicious alien race known as the Combine, set between the events of Half-Life and Half-Life 2. Playing as Alyx Vance, you are humanity’s only chance for survival.

Half-Life: Alyx banner

Half-Life: Alyx has achieved a Player Score of 97, placing it in the #3 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 92,573 reviews on Steam. This breaks down to a total of 91,013 positive reviews and 1,560 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $59.99 to play and can be played and ran on Windows systems. At the moment, it is not possible to play or run Half-Life: Alyx on the Steam Deck.

Steam Price $59.99
Release Date 3/23/2020
Franchise Valve
Developer Valve
Publisher Valve
Steam App Id 546560

4. RimWorld

A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.

RimWorld banner

RimWorld has achieved a Player Score of 97, placing it in the #4 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 196,724 reviews on Steam. This breaks down to a total of 192,761 positive reviews and 3,963 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $34.99 to play and can be played and ran on Windows, Mac, and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $34.99
Release Date 10/17/2018
Developer Ludeon Studios
Publisher Ludeon Studios
Steam App Id 294100

5. Senren*Banka

Senren*Banka is a Japanese-style visual novel produced by Yuzusoft, a Japanese developer of romance VNs. This game commemorated Yuzusoft's 10th anniversary. It won numerous awards on the year of its release in Japan for its art, music, and characters.

Senren*Banka banner

Senren*Banka has achieved a Player Score of 97, placing it in the #5 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 27,175 reviews on Steam. This breaks down to a total of 26,897 positive reviews and 278 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $19.94 to play and can be played and ran on Windows systems. At the moment, it is not possible to play or run Senren*Banka on the Steam Deck.

Steam Price $19.94
Release Date 2/14/2020
Franchise 株式会社HIKARI FIELD
Developer Yuzusoft
Publishers
Steam App Id 1144400

6. ULTRAKILL

ULTRAKILL is a fast-paced ultraviolent retro FPS combining the skill-based style scoring from character action games with unadulterated carnage inspired by the best shooters of the '90s. Rip apart your foes with varied destructive weapons and shower in their blood to regain your health.

ULTRAKILL banner

ULTRAKILL has achieved a Player Score of 96, placing it in the #6 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 133,431 reviews on Steam. This breaks down to a total of 130,565 positive reviews and 2,866 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $24.99 to play and can be played and ran on Windows systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $24.99
Release Date 9/3/2020
Franchise New Blood Interactive
Developer Arsi "Hakita" Patala
Publisher New Blood Interactive
Steam App Id 1229490

7. Half-Life 2

Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.

Half-Life 2 banner

Half-Life 2 has achieved a Player Score of 96, placing it in the #7 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 214,325 reviews on Steam. This breaks down to a total of 209,089 positive reviews and 5,236 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 to play and can be played and ran on both Windows and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $9.99
Release Date 11/16/2004
Franchise Half-Life
Developer Valve
Publisher Valve
Steam App Id 220

8. Katana ZERO

Katana ZERO is a stylish neo-noir, action-platformer featuring breakneck action and instant-death combat. Slash, dash, and manipulate time to unravel your past in a beautifully brutal acrobatic display.

Katana ZERO banner

Katana ZERO has achieved a Player Score of 96, placing it in the #8 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 68,261 reviews on Steam. This breaks down to a total of 66,917 positive reviews and 1,344 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $14.99 to play and can be played and ran on both Windows and Mac systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $14.99
Release Date 4/18/2019
Developer Askiisoft
Publisher Devolver Digital
Steam App Id 460950

9. Lethal Company

A co-op horror about scavenging at abandoned moons to sell scrap to the Company.

Lethal Company banner

Lethal Company has achieved a Player Score of 96, placing it in the #9 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 445,919 reviews on Steam. This breaks down to a total of 433,760 positive reviews and 12,159 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 to play and can be played and ran on Windows systems. At the moment, it is possible to play Lethal Company on the Steam Deck (though some functionality may be limited).

Steam Price $9.99
Release Date 10/23/2023
Developer Zeekerss
Publisher Zeekerss
Steam App Id 1966720

10. Deep Rock Galactic

Deep Rock Galactic is a 1-4 player co-op FPS featuring badass space Dwarves, 100% destructible environments, procedurally-generated caves, and endless hordes of alien monsters.

Deep Rock Galactic banner

Deep Rock Galactic has achieved a Player Score of 96, placing it in the #10 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 316,428 reviews on Steam. This breaks down to a total of 307,545 positive reviews and 8,883 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $29.99 to play and can be played and ran on Windows systems. At the moment, it is possible to play Deep Rock Galactic on the Steam Deck (though some functionality may be limited).

Steam Price $29.99
Release Date 5/13/2020
Franchise Coffee Stain
Developer Ghost Ship Games
Publisher Coffee Stain Publishing
Steam App Id 548430

More Sci-fi Games

Explore even more rankings for the 100 best Sci-fi games available on Steam.

ImageName
Actions
Portal 2 steam charts
1,764
4/18/2011
98
$9.99
Steam Charts
Portal steam charts
682
10/10/2007
97
$9.99
Steam Charts
Half-Life: Alyx steam charts
676
3/23/2020
97
$59.99
Steam Charts
RimWorld steam charts
21,033
10/17/2018
97
$34.99
Steam Charts
Senren*Banka steam charts
1,297
2/14/2020
97
$19.94
Steam Charts
ULTRAKILL steam charts
1,435
9/3/2020
96
$24.99
Steam Charts
Half-Life 2 steam charts
26,535
11/16/2004
96
$9.99
Steam Charts
Katana ZERO steam charts
114
4/18/2019
96
$14.99
Steam Charts
Lethal Company steam charts
8,562
10/23/2023
96
$9.99
Steam Charts
Deep Rock Galactic steam charts
8,173
5/13/2020
96
$29.99
Steam Charts
ATRI -My Dear Moments- steam charts
101
6/18/2020
96
$20.99
Steam Charts
Dyson Sphere Program steam charts
4,428
1/21/2021
96
$19.99
Steam Charts
Entropy : Zero 2 steam charts
467
8/20/2022
96
Free
Steam Charts
Stray steam charts
299
7/19/2022
96
$29.99
Steam Charts
Subnautica steam charts
4,916
1/24/2018
96
$29.99
Steam Charts
Satisfactory steam charts
23,243
9/10/2024
96
$39.99
Steam Charts
STAR WARS™ Empire at War - Gold Pack steam charts
1,120
5/26/2010
96
$19.99
Steam Charts
VA-11 Hall-A: Cyberpunk Bartender Action steam charts
188
6/21/2016
95
$10.04
Steam Charts
Oxygen Not Included steam charts
15,613
7/30/2019
95
$8.49
Steam Charts
SANABI steam charts
220
11/9/2023
95
$14.99
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. Reviews 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, October 18). Steam Store. Steam Store.
  • Valve Corporation. (2024, October 18). Portal 2 on Steam. Steam Store.
  • Valve Corporation. (2024, November 23). Portal on Steam. Steam Store.
  • Valve Corporation. (2024, November 23). Half-Life: Alyx on Steam. Steam Store.
  • Valve Corporation. (2024, November 22). RimWorld on Steam. Steam Store.
  • Valve Corporation. (2024, November 19). Senren*Banka on Steam. Steam Store.
  • Valve Corporation. (2024, November 23). ULTRAKILL on Steam. Steam Store.
  • Valve Corporation. (2024, November 23). Half-Life 2 on Steam. Steam Store.
  • Valve Corporation. (2024, November 4). Katana ZERO on Steam. Steam Store.
  • Valve Corporation. (2024, November 10). Lethal Company on Steam. Steam Store.
  • Valve Corporation. (2024, November 22). Deep Rock Galactic on Steam. Steam Store.

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