Free Science Games on Steam
Steam currently has 1,283 Science 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 Science game rankings were last updated on 10/6/2025.
Looking for more? Explore other lists such as:
- Best science games on Steam
- Best science Steam Deck games
- Best science Steam games for Mac OS
- Best science Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
1. Cell to Singularity - Evolution Never Ends
The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.
Cell to Singularity - Evolution Never Ends holds the #1 spot for "best free Science game on Steam" with a Player Score of 88. Its score was calculated by analyzing a total of 24,531 reviews on Steam. This breaks down to a total of 22,008 positive reviews and 2,523 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is possible to play Cell to Singularity - Evolution Never Ends on the Steam Deck (though some functionality may be limited).
| Release Date | 11/3/2021 |
| Developer | Computer Lunch |
| Publisher | Computer Lunch |
| Steam App Id | 977400 |
2. Resonite
Enter a novel digital universe with infinite possibilities. Whether you resonate with people around the world in a casual conversation, playing games and socializing or you riff off each other when creating anything from art to programming complex games, you'll find your place here.
Resonite has achieved a Player Score of 78, placing it in the #2 spot for the best free Science games. Its score was calculated by analyzing a total of 1,332 reviews on Steam. This breaks down to a total of 1,092 positive reviews and 240 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 Resonite on the Steam Deck (though some functionality may be limited).
| Release Date | 10/6/2023 |
| Developers | |
| Publisher | Yellow Dog Man Studios |
| Steam App Id | 2519830 |
3. Idle Sphere
Stunning sphere-themed idle/incremental game. Experience simplicity's beauty.
Idle Sphere has achieved a Player Score of 51, placing it in the #3 spot for the best free Science games. Its score was calculated by analyzing a total of 288 reviews on Steam. This breaks down to a total of 148 positive reviews and 140 negative reviews — making it "Mixed" 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 Idle Sphere on the Steam Deck.
| Release Date | 11/17/2024 |
| Developers | |
| Publisher | Idle System, Inc. |
| Steam App Id | 3217600 |
4. Star Conflict
Star Conflict is an action-packed, massively multiplayer space simulation game that puts players in the role of elite pilots engaging in a widespread interplanetary skirmish. The whole world for PVP and PVE!
Star Conflict has achieved a Player Score of 72, placing it in the #4 spot for the best free Science games. Its score was calculated by analyzing a total of 14,931 reviews on Steam. This breaks down to a total of 10,884 positive reviews and 4,047 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Star Conflict on the Steam Deck (though some functionality may be limited).
| Release Date | 2/27/2013 |
| Franchise | Gaijin Network Ltd |
| Developer | Star Gem Inc. |
| Publishers | |
| Steam App Id | 212070 |
5. Portal: Revolution
The Portal Mod you've been waiting for. Delve into a new story with original characters, spanning over 8 hours of gameplay and featuring over 40 new challenging test chambers which make use of new mechanics.
Portal: Revolution has achieved a Player Score of 94, placing it in the #5 spot for the best free Science games. Its score was calculated by analyzing a total of 27,519 reviews on Steam. This breaks down to a total of 26,466 positive reviews and 1,053 negative reviews — making it "Overwhelmingly Positive" on Steam.
It 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.
| Release Date | 1/6/2024 |
| Developer | Second Face Software |
| Publisher | Second Face Software |
| Steam App Id | 601360 |
6. The Powder Toy
The Powder Toy is a classic physics sandbox game, which simulates air pressure and velocity, heat, gravity and a countless number of interactions between different substances
The Powder Toy has achieved a Player Score of 94, placing it in the #6 spot for the best free Science games. Its score was calculated by analyzing a total of 2,088 reviews on Steam. This breaks down to a total of 2,058 positive reviews and 30 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play The Powder Toy on the Steam Deck (though some functionality may be limited).
| Release Date | 6/14/2024 |
| Developer | The Powder Toy Team |
| Publisher | The Powder Toy Team |
| Steam App Id | 1148350 |
7. Incremental Cubes
Cube based incremental game that is simple but very deep!
Incremental Cubes has achieved a Player Score of 67, placing it in the #7 spot for the best free Science games. Its score was calculated by analyzing a total of 971 reviews on Steam. This breaks down to a total of 669 positive reviews and 302 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 Incremental Cubes on the Steam Deck.
| Release Date | 11/3/2021 |
| Developers | |
| Publisher | Idle System, Inc. |
| Steam App Id | 1690730 |
8. Portal Reloaded
Portal Reloaded is a free, community made modification for Portal 2. The mod builds on the concepts of the main game by allowing you to place a third portal, which enables traveling between two different timelines. Thinking in four dimensions is vital to solving 25 brand new mind-bending puzzles.
Portal Reloaded has achieved a Player Score of 94, placing it in the #8 spot for the best free Science games. Its score was calculated by analyzing a total of 21,367 reviews on Steam. This breaks down to a total of 20,546 positive reviews and 821 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Portal Reloaded on the Steam Deck (though some functionality may be limited).
9. Space Travel Idle
If you ever dreamed of exploring space at a relaxed pace, here's a journey designed for you.
Space Travel Idle has achieved a Player Score of 61, placing it in the #9 spot for the best free Science games. Its score was calculated by analyzing a total of 535 reviews on Steam. This breaks down to a total of 337 positive reviews and 198 negative reviews — making it "Mixed" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is possible to play Space Travel Idle on the Steam Deck (though some functionality may be limited).
| Release Date | 9/22/2020 |
| Developer | Ayatsuji_San |
| Publisher | Spaceive |
| Steam App Id | 1407860 |
10. Portal Stories: Mel
Portal Stories: Mel is a community made, free modification for Portal 2 based in the Portal universe. It tells the story of Mel, who meets a new personality core and faces an undiscovered threat to the Aperture facility.
Portal Stories: Mel has achieved a Player Score of 94, placing it in the #10 spot for the best free Science games. Its score was calculated by analyzing a total of 22,969 reviews on Steam. This breaks down to a total of 22,065 positive reviews and 904 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Portal Stories: Mel on the Steam Deck (though some functionality may be limited).
| Release Date | 6/25/2015 |
| Developer | Prism Game Studios Ltd. |
| Publisher | Prism Game Studios Ltd. |
| Steam App Id | 317400 |
More Free Science Games
Explore even more rankings for the 100 best free Science games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 2,556 | 11/3/2021 | 88 | Free | Steam Charts | |
| 139 | 10/6/2023 | 78 | Free | Steam Charts | |
| 76 | 11/17/2024 | 51 | Free | Steam Charts | |
| 53 | 2/27/2013 | 72 | Free | Steam Charts | |
| 52 | 1/6/2024 | 94 | Free | Steam Charts | |
| 51 | 6/14/2024 | 94 | Free | Steam Charts | |
| 39 | 11/3/2021 | 67 | Free | Steam Charts | |
| 22 | 4/19/2021 | 94 | Free | Steam Charts | |
| 21 | 9/22/2020 | 61 | Free | Steam Charts | |
| 21 | 6/25/2015 | 94 | Free | Steam Charts | |
 | 16 | 6/12/2020 | 65 | Free | Steam Charts | |
 | 8 | 8/1/2023 | 89 | Free | Steam Charts | |
 | 7 | 6/20/2023 | 75 | Free | Steam Charts | |
 | 5 | 12/7/2021 | 85 | Free | Steam Charts | |
 | 4 | 12/14/2024 | 60 | Free | Steam Charts | |
 | 2 | 9/2/2024 | 55 | Free | Steam Charts | |
 | 2 | 9/5/2025 | 52 | Free | Steam Charts | |
 | 2 | 8/20/2025 | 65 | Free | Steam Charts | |
 | 2 | 7/29/2025 | 82 | Free | Steam Charts | |
 | 2 | 7/14/2022 | 67 | 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. (2025, October 6). Steam Store. Steam Store.
- Valve Corporation. (2025, October 6). Cell to Singularity - Evolution Never Ends on Steam. Steam Store.
- Valve Corporation. (2025, October 6). Resonite on Steam. Steam Store.
- Valve Corporation. (2025, September 14). Idle Sphere on Steam. Steam Store.
- Valve Corporation. (2025, October 4). Star Conflict on Steam. Steam Store.
- Valve Corporation. (2025, August 15). Portal: Revolution on Steam. Steam Store.
- Valve Corporation. (2025, September 28). The Powder Toy on Steam. Steam Store.
- Valve Corporation. (2025, October 6). Incremental Cubes on Steam. Steam Store.
- Valve Corporation. (2025, October 2). Portal Reloaded on Steam. Steam Store.
- Valve Corporation. (2025, October 3). Space Travel Idle on Steam. Steam Store.
- Valve Corporation. (2025, August 14). Portal Stories: Mel on Steam. Steam Store.