Best Sci-fi Games on Steam (for Mac OS)
Steam currently has 15,344 Sci-fi games, but not all of them are able to be played on Mac. 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 6/20/2026.
Looking for more? Explore other lists such as:
- Best sci-fi games on Steam
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- Free sci-fi games on Steam
- Free Steam games
- Most played Steam games
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1. 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 holds the #1 spot for "best Mac OS Sci-fi game on Steam" with a Player Score of 97. Its score was calculated by analyzing a total of 241,609 reviews on Steam. This breaks down to a total of 236,485 positive reviews and 5,124 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 |
2. 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 has achieved a Player Score of 96, placing it in the #2 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 75,268 reviews on Steam. This breaks down to a total of 73,720 positive reviews and 1,548 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 |
3. Subnautica
Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.
Subnautica has achieved a Player Score of 96, placing it in the #3 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 373,573 reviews on Steam. This breaks down to a total of 362,689 positive reviews and 10,884 negative reviews — making it "Overwhelmingly Positive" on Steam.
It is priced at $29.99 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 | $29.99 |
| Release Date | 1/23/2018 |
| Franchise | Unknown Worlds |
| Developer | Unknown Worlds Entertainment |
| Publishers | |
| Steam App Id | 264710 |
4. Stray
Lost, alone and separated from family, a stray cat must untangle an ancient mystery to escape a long-forgotten cybercity and find their way home.
Stray has achieved a Player Score of 96, placing it in the #4 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 174,075 reviews on Steam. This breaks down to a total of 169,228 positive reviews and 4,847 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 | 7/19/2022 |
| Franchise | Annapurna Interactive |
| Developer | BlueTwelve Studio |
| Publisher | Annapurna Interactive |
| Steam App Id | 1332010 |
5. Rhythm Doctor
Save patients with your rhythm mastery! Rhythm Doctor is a rhythm game where you heal patients by defibrillating in time to their heartbeats. Learn each patient's unique heartbeat and defeat boss viruses trying to sabotage your rhythm, all set to heart-pumping, soul-soothing music.
Rhythm Doctor has achieved a Player Score of 96, placing it in the #5 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 26,517 reviews on Steam. This breaks down to a total of 26,031 positive reviews and 486 negative reviews — making it "Overwhelmingly Positive" on Steam.
It is priced at $15.99 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 | $15.99 |
| Release Date | 12/6/2025 |
| Franchise | 7th Beat Games |
| Developer | 7th Beat Games |
| Publishers | |
| Steam App Id | 774181 |
6. Oxygen Not Included
Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.
Oxygen Not Included has achieved a Player Score of 95, placing it in the #6 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 141,925 reviews on Steam. This breaks down to a total of 137,305 positive reviews and 4,620 negative reviews — making it "Overwhelmingly Positive" on Steam.
It is priced at $7.49 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 | $7.49 |
| Release Date | 7/30/2019 |
| Franchise | Klei |
| Developer | Klei Entertainment |
| Publisher | Klei Entertainment |
| Steam App Id | 457140 |
7. Finding Paradise
Two doctors traverse backwards through a dying man's memories to fulfill his last wish. This is To the Moon's standalone sequel, but can also be played first.
Finding Paradise has achieved a Player Score of 95, placing it in the #7 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 20,092 reviews on Steam. This breaks down to a total of 19,643 positive reviews and 449 negative reviews — making it "Overwhelmingly Positive" on Steam.
It is priced at $1.99 to play and can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Finding Paradise on the Steam Deck (though some functionality may be limited).
| Steam Price | $1.99 |
| Release Date | 12/14/2017 |
| Franchise | Freebird Games |
| Developer | Freebird Games |
| Publishers | |
| Steam App Id | 337340 |
8. Half-Life
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
Half-Life has achieved a Player Score of 95, placing it in the #8 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 161,739 reviews on Steam. This breaks down to a total of 156,092 positive reviews and 5,647 negative reviews — making it "Overwhelmingly Positive" on Steam.
It is priced at $1.99 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.
9. Z.A.T.O. // I Love the World and Everything In It
USSR, 1986. A girl goes missing in the closed city of Vorkuta-5, yet not a soul seems to be concerned. Uncover the mystery behind her disappearance and transmit your signal to the universe.
Z.A.T.O. // I Love the World and Everything In It has achieved a Player Score of 95, placing it in the #9 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 10,209 reviews on Steam. This breaks down to a total of 10,026 positive reviews and 183 negative reviews — making it "Overwhelmingly Positive" on Steam.
It is completely free 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.
| Release Date | 11/10/2025 |
| Developer | Ferry // Nopanamaman |
| Publisher | Ferry // Nopanamaman |
| Steam App Id | 4122860 |
10. Outlast
Hell is an experiment you can't survive in Outlast, a first-person survival horror game developed by veterans of some of the biggest game franchises in history. As investigative journalist Miles Upshur, explore Mount Massive Asylum and try to survive long enough to discover its terrible secret... if you dare.
Outlast has achieved a Player Score of 95, placing it in the #10 spot for the best Mac OS Sci-fi games. Its score was calculated by analyzing a total of 136,489 reviews on Steam. This breaks down to a total of 131,647 positive reviews and 4,842 negative reviews — making it "Overwhelmingly Positive" on Steam.
It is priced at $3.74 to play and can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Outlast on the Steam Deck (though some functionality may be limited).
| Steam Price | $3.74 |
| Release Date | 9/4/2013 |
| Franchise | Red Barrels |
| Developer | Red Barrels |
| Publisher | Red Barrels |
| Steam App Id | 238320 |
More Sci-fi Mac Games on Steam
Explore even more rankings for the 10 best Sci-fi games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 22,950 | 10/17/2018 | 97 | $34.99 | Steam Charts | |
| 98 | 4/18/2019 | 96 | $8.99 | Steam Charts | |
| 4,353 | 1/23/2018 | 96 | $29.99 | Steam Charts | |
| 235 | 7/19/2022 | 96 | $14.99 | Steam Charts | |
| 84 | 12/6/2025 | 96 | $15.99 | Steam Charts | |
| 9,061 | 7/30/2019 | 95 | $7.49 | Steam Charts | |
| 16 | 12/14/2017 | 95 | $1.99 | Steam Charts | |
| 799 | 11/19/1998 | 95 | $1.99 | Steam Charts | |
| 105 | 11/10/2025 | 95 | Free | Steam Charts | |
| 190 | 9/4/2013 | 95 | $3.74 | Steam Charts |
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. (2026, June 20). Steam Store. Steam Store.
- Valve Corporation. (2026, June 20). RimWorld on Steam. Steam Store.
- Valve Corporation. (2026, June 16). Katana ZERO on Steam. Steam Store.
- Valve Corporation. (2026, June 23). Subnautica on Steam. Steam Store.
- Valve Corporation. (2026, June 25). Stray on Steam. Steam Store.
- Valve Corporation. (2026, June 25). Rhythm Doctor on Steam. Steam Store.
- Valve Corporation. (2026, June 25). Oxygen Not Included on Steam. Steam Store.
- Valve Corporation. (2026, June 25). Finding Paradise on Steam. Steam Store.
- Valve Corporation. (2026, June 26). Half-Life on Steam. Steam Store.
- Valve Corporation. (2026, June 17). Z.A.T.O. // I Love the World and Everything In It on Steam. Steam Store.
- Valve Corporation. (2026, June 25). Outlast on Steam. Steam Store.