Best Sci-fi Games on Steam

Steam currently has 9,428 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 5/18/2024.

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 392,326 reviews on Steam. This breaks down to a total of 387,317 positive reviews and 5,009 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 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 $9.99
Release Date 4/18/2011
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 156,576 reviews on Steam. This breaks down to a total of 154,221 positive reviews and 2,355 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 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 $9.99
Release Date 10/10/2007
Developer Valve
Publisher Valve
Steam App Id 400

3. 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 #3 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 186,560 reviews on Steam. This breaks down to a total of 182,909 positive reviews and 3,651 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

4. 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 #4 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 88,627 reviews on Steam. This breaks down to a total of 87,170 positive reviews and 1,457 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 Half-Life
Developer Valve
Publisher Valve
Steam App Id 546560

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 22,046 reviews on Steam. This breaks down to a total of 21,840 positive reviews and 206 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $34.99 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 $34.99
Release Date 2/14/2020
Franchise 株式会社HIKARI FIELD
Developer Yuzusoft
Publishers
Steam App Id 1144400

6. 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 97, placing it in the #6 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 394,907 reviews on Steam. This breaks down to a total of 384,973 positive reviews and 9,934 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

7. 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 #7 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 112,782 reviews on Steam. This breaks down to a total of 110,438 positive reviews and 2,344 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

8. Half-Life 2

1998. HALF-LIFE sends a shock through the game industry with its combination of pounding action and continuous, immersive storytelling. Valve's debut title wins more than 50 game-of-the-year awards on its way to being named "Best PC Game Ever" by PC Gamer, and launches a franchise with more than eight million retail units sold worldwide.

Half-Life 2 banner

Half-Life 2 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 191,879 reviews on Steam. This breaks down to a total of 187,309 positive reviews and 4,570 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 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 $9.99
Release Date 11/16/2004
Franchise Half-Life
Developer Valve
Publisher Valve
Steam App Id 220

9. 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 #9 spot for the best Sci-fi games. Its score was calculated by analyzing a total of 64,879 reviews on Steam. This breaks down to a total of 63,622 positive reviews and 1,257 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $8.99 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 $8.99
Release Date 4/18/2019
Developer Askiisoft
Publisher Devolver Digital
Steam App Id 460950

10. ATRI -My Dear Moments-

"As the world sank, I found you." In the near future, a sudden and unexplained sea rise has left much of human civilization underwater. In a little town slowly being enveloped by the ocean, an unforgettable summer is about to begin for a boy and a mysterious robot girl...

ATRI -My Dear Moments- banner

ATRI -My Dear Moments- 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 15,634 reviews on Steam. This breaks down to a total of 15,447 positive reviews and 187 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $20.99 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 $20.99
Release Date 6/18/2020
Franchise ANIPLEX.EXE
Developers
Publishers
Steam App Id 1230140

More Sci-fi Games

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

ImageName
Actions
Portal 2 steam charts
942
4/18/2011
98
$9.99
Steam Charts
Portal steam charts
250
10/10/2007
97
$9.99
Steam Charts
RimWorld steam charts
18,363
10/17/2018
97
$34.99
Steam Charts
Half-Life: Alyx steam charts
143
3/23/2020
97
$59.99
Steam Charts
Senren*Banka steam charts
452
2/14/2020
97
$34.99
Steam Charts
Lethal Company steam charts
6,887
10/23/2023
97
$9.99
Steam Charts
ULTRAKILL steam charts
1,264
9/3/2020
96
$24.99
Steam Charts
Half-Life 2 steam charts
369
11/16/2004
96
$9.99
Steam Charts
Katana ZERO steam charts
210
4/18/2019
96
$8.99
Steam Charts
ATRI -My Dear Moments- steam charts
69
6/18/2020
96
$20.99
Steam Charts
Dyson Sphere Program steam charts
2,506
1/20/2021
96
$19.99
Steam Charts
Deep Rock Galactic steam charts
4,518
5/13/2020
96
$29.99
Steam Charts
Entropy : Zero 2 steam charts
77
8/20/2022
96
Free
Steam Charts
Stray steam charts
190
7/19/2022
96
$29.99
Steam Charts
Subnautica steam charts
1,626
1/24/2018
96
$29.99
Steam Charts
Satisfactory steam charts
4,036
6/8/2020
96
$29.99
Steam Charts
Brotato steam charts
2,787
6/23/2023
96
$3.74
Steam Charts
STAR WARS™ Empire at War - Gold Pack steam charts
1,180
5/26/2010
96
$19.99
Steam Charts
VA-11 Hall-A: Cyberpunk Bartender Action steam charts
50
6/21/2016
95
$14.99
Steam Charts
Oxygen Not Included steam charts
6,640
7/30/2019
95
$24.99
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, May 18). Steam Store. Steam Store.
  • Valve Corporation. (2024, May 18). Portal 2 on Steam. Steam Store.
  • Valve Corporation. (2024, May 18). Portal on Steam. Steam Store.
  • Valve Corporation. (2024, May 20). RimWorld on Steam. Steam Store.
  • Valve Corporation. (2024, May 16). Half-Life: Alyx on Steam. Steam Store.
  • Valve Corporation. (2024, May 19). Senren*Banka on Steam. Steam Store.
  • Valve Corporation. (2024, May 18). Lethal Company on Steam. Steam Store.
  • Valve Corporation. (2024, May 18). ULTRAKILL on Steam. Steam Store.
  • Valve Corporation. (2024, May 18). Half-Life 2 on Steam. Steam Store.
  • Valve Corporation. (2024, May 20). Katana ZERO on Steam. Steam Store.
  • Valve Corporation. (2024, May 18). ATRI -My Dear Moments- on Steam. Steam Store.

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