Free Science Games on Steam
Steam currently has 1,132 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 2/15/2025.
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 22,770 reviews on Steam. This breaks down to a total of 20,499 positive reviews and 2,271 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. Idle Sphere
Stunning sphere-themed idle/incremental game. Experience simplicity's beauty.
Idle Sphere has achieved a Player Score of 57, placing it in the #2 spot for the best free Science games. Its score was calculated by analyzing a total of 201 reviews on Steam. This breaks down to a total of 117 positive reviews and 84 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 |
3. 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 #3 spot for the best free Science games. Its score was calculated by analyzing a total of 25,029 reviews on Steam. This breaks down to a total of 24,060 positive reviews and 969 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 |
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 14,769 reviews on Steam. This breaks down to a total of 10,848 positive reviews and 3,921 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. 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 #5 spot for the best free Science games. Its score was calculated by analyzing a total of 1,184 reviews on Steam. This breaks down to a total of 967 positive reviews and 217 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Linux 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 |
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 93, placing it in the #6 spot for the best free Science games. Its score was calculated by analyzing a total of 1,577 reviews on Steam. This breaks down to a total of 1,558 positive reviews and 19 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. 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 #7 spot for the best free Science games. Its score was calculated by analyzing a total of 20,747 reviews on Steam. This breaks down to a total of 19,956 positive reviews and 791 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).
8. 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 #8 spot for the best free Science games. Its score was calculated by analyzing a total of 22,388 reviews on Steam. This breaks down to a total of 21,525 positive reviews and 863 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 6/25/2015 |
| Developer | Prism Game Studios Ltd. |
| Publisher | Prism Game Studios Ltd. |
| Steam App Id | 317400 |
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 62, placing it in the #9 spot for the best free Science games. Its score was calculated by analyzing a total of 523 reviews on Steam. This breaks down to a total of 333 positive reviews and 190 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. 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 #10 spot for the best free Science games. Its score was calculated by analyzing a total of 930 reviews on Steam. This breaks down to a total of 641 positive reviews and 289 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 |
More Free Science Games
Explore even more rankings for the 100 best free Science games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 3,729 | 11/3/2021 | 88 | Free | Steam Charts | |
| 378 | 11/17/2024 | 57 | Free | Steam Charts | |
| 196 | 1/6/2024 | 94 | Free | Steam Charts | |
| 163 | 2/27/2013 | 72 | Free | Steam Charts | |
| 152 | 10/6/2023 | 78 | Free | Steam Charts | |
| 120 | 6/14/2024 | 93 | Free | Steam Charts | |
| 83 | 4/19/2021 | 94 | Free | Steam Charts | |
| 73 | 6/25/2015 | 94 | Free | Steam Charts | |
| 57 | 9/22/2020 | 62 | Free | Steam Charts | |
| 50 | 11/3/2021 | 67 | Free | Steam Charts | |
 | 24 | 6/12/2020 | 64 | Free | Steam Charts | |
 | 17 | 8/1/2023 | 89 | Free | Steam Charts | |
 | 12 | 8/31/2021 | 53 | Free | Steam Charts | |
 | 11 | 8/3/2020 | 78 | Free | Steam Charts | |
 | 8 | 7/27/2021 | 76 | Free | Steam Charts | |
 | 5 | 12/19/2024 | 70 | Free | Steam Charts | |
 | 5 | 11/8/2024 | 46 | Free | Steam Charts | |
 | 4 | 8/6/2020 | 76 | Free | Steam Charts | |
 | 4 | 2/2/2024 | 84 | Free | Steam Charts | |
 | 3 | 1/12/2018 | 74 | 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, February 15). Steam Store. Steam Store.
- Valve Corporation. (2025, February 15). Cell to Singularity - Evolution Never Ends on Steam. Steam Store.
- Valve Corporation. (2025, February 12). Idle Sphere on Steam. Steam Store.
- Valve Corporation. (2025, February 10). Portal: Revolution on Steam. Steam Store.
- Valve Corporation. (2025, February 13). Star Conflict on Steam. Steam Store.
- Valve Corporation. (2025, February 14). Resonite on Steam. Steam Store.
- Valve Corporation. (2025, February 6). The Powder Toy on Steam. Steam Store.
- Valve Corporation. (2025, January 25). Portal Reloaded on Steam. Steam Store.
- Valve Corporation. (2025, February 5). Portal Stories: Mel on Steam. Steam Store.
- Valve Corporation. (2025, January 20). Space Travel Idle on Steam. Steam Store.
- Valve Corporation. (2025, January 29). Incremental Cubes on Steam. Steam Store.