Free Base Building Games on Steam
Steam currently has 4,464 Base Building 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 Base Building game rankings were last updated on 4/23/2026.
Looking for more? Explore other lists such as:
- Best base building games on Steam
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- Free Steam games
- Most played Steam games
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1. Once Human
Once Human is a multiplayer open-world survival game set in a strange, post-apocalyptic future. Unite with friends to fight monstrous enemies, uncover secret plots, compete for resources, and build your own territory. Once, you were merely human. Now, you have the power to remake the world.
Once Human holds the #1 spot for "best free Base Building game on Steam" with a Player Score of 77. Its score was calculated by analyzing a total of 170,752 reviews on Steam. This breaks down to a total of 132,491 positive reviews and 38,261 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Once Human on the Steam Deck.
| Release Date | 7/9/2024 |
| Developer | Starry Studio |
| Publishers | |
| Steam App Id | 2139460 |
2. Age of Empires III: Definitive Edition
Age of Empires III: Definitive Edition offers players a trial of this historical single & multiplayer RTS experience. *Note: To unlock all features of the game please see the “Base Game” product.
Age of Empires III: Definitive Edition has achieved a Player Score of 84, placing it in the #2 spot for the best free Base Building games. Its score was calculated by analyzing a total of 53,146 reviews on Steam. This breaks down to a total of 45,415 positive reviews and 7,731 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 Age of Empires III: Definitive Edition on the Steam Deck (though some functionality may be limited).
| Release Date | 10/15/2020 |
| Franchise | Age of Empires Franchise |
| Developers | |
| Publisher | Xbox Game Studios |
| Steam App Id | 933110 |
3. Shop Titans
Shop Titans is the ultimate RPG shopkeeper simulation. Craft powerful equipment, stock your shop and sell to aspiring heroes… at a markup! Hire heroes and explore dungeons to gather valuable materials to craft with. There’s never a dull moment in the world of Shop Titans!
Shop Titans has achieved a Player Score of 77, placing it in the #3 spot for the best free Base Building games. Its score was calculated by analyzing a total of 17,765 reviews on Steam. This breaks down to a total of 13,858 positive reviews and 3,907 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows systems. Valve has also verified it as playable on the Steam Deck and will run well.
| Release Date | 5/5/2020 |
| Developer | Kabam Games, Inc. |
| Publisher | Kabam Games, Inc. |
| Steam App Id | 1258080 |
4. Fallout Shelter
Fallout Shelter puts you in control of a state-of-the-art underground Vault from Vault-Tec. Build the perfect Vault, keep your Dwellers happy, and protect them from the dangers of the Wasteland.
Fallout Shelter has achieved a Player Score of 87, placing it in the #4 spot for the best free Base Building games. Its score was calculated by analyzing a total of 80,777 reviews on Steam. This breaks down to a total of 71,043 positive reviews and 9,734 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. Valve has also verified it as playable on the Steam Deck and will run well.
| Release Date | 3/29/2017 |
| Developer | Bethesda Game Studios |
| Publisher | Bethesda Softworks |
| Steam App Id | 588430 |
5. Muck
Muck is a survival-roguelike. Collect resources, find items & build a base to survive for as long as you can.
Muck has achieved a Player Score of 92, placing it in the #5 spot for the best free Base Building games. Its score was calculated by analyzing a total of 182,673 reviews on Steam. This breaks down to a total of 170,600 positive reviews and 12,073 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Muck on the Steam Deck (though some functionality may be limited).
6. The Perfect Tower II
The Perfect Tower II is a mix between an incremental and a tower defense game. Build a town, manage resources and explore a variety of mini-games and tons of upgrades. Fully automate your game and watch numbers going up!
The Perfect Tower II has achieved a Player Score of 84, placing it in the #6 spot for the best free Base Building games. Its score was calculated by analyzing a total of 4,281 reviews on Steam. This breaks down to a total of 3,718 positive reviews and 563 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 The Perfect Tower II on the Steam Deck (though some functionality may be limited).
| Release Date | 11/30/2025 |
| Franchise | Fire Sword Studios |
| Developer | Fire Sword Studios |
| Publisher | Fire Sword Studios |
| Steam App Id | 1197260 |
7. March of Empires
Claim your title as Shogun, Highland King, Northern Tsar or Desert Sultan and join this genre-redefining strategy game where you will wage constant war for real territorial conquest! Fortify your castle, fuel a massive army, and enter the ultimate fight for realm domination!
March of Empires has achieved a Player Score of 61, placing it in the #7 spot for the best free Base Building games. Its score was calculated by analyzing a total of 1,813 reviews on Steam. This breaks down to a total of 1,135 positive reviews and 678 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play March of Empires on the Steam Deck (though some functionality may be limited).
8. Cividle
CivIdle is an idle/incremental game that allows you to lead your own civilization through thousands of years from ancient times to the modern era. Expand your territory, explore a vast tech tree, build various wonders, and trade with global players: empire must grow and numbers must go up!
Cividle has achieved a Player Score of 71, placing it in the #8 spot for the best free Base Building games. Its score was calculated by analyzing a total of 1,000 reviews on Steam. This breaks down to a total of 743 positive reviews and 257 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 Cividle on the Steam Deck (though some functionality may be limited).
| Release Date | 12/5/2025 |
| Franchise | Fish Pond Studio |
| Developers | |
| Publisher | Fish Pond Studio |
| Steam App Id | 2181940 |
9. War Selection
War Selection is a compelling RTS game featuring base building, resource extraction and warfare. Evolve from a stone age tribe to a distinct industrial nation with unique game mechanics and battle for supremacy with dozens of players on a unique procedurally generated map.
War Selection has achieved a Player Score of 84, placing it in the #9 spot for the best free Base Building games. Its score was calculated by analyzing a total of 23,127 reviews on Steam. This breaks down to a total of 19,749 positive reviews and 3,378 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 War Selection on the Steam Deck (though some functionality may be limited).
| Release Date | 10/8/2019 |
| Developer | Glyph Worlds |
| Publisher | Glyph Worlds |
| Steam App Id | 1022450 |
10. Doomsday × Ghost in the Shell
Fight the Posthuman crisis in the Ghost in the Shell collab!
Doomsday × Ghost in the Shell has achieved a Player Score of 64, placing it in the #10 spot for the best free Base Building games. Its score was calculated by analyzing a total of 858 reviews on Steam. This breaks down to a total of 568 positive reviews and 290 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Doomsday × Ghost in the Shell on the Steam Deck (though some functionality may be limited).
| Release Date | 6/25/2023 |
| Developer | IGG SINGAPORE PTE. LTD. |
| Publisher | IGG SINGAPORE PTE. LTD. |
| Steam App Id | 2439510 |
More Free Base Building Games
Explore even more rankings for the 100 best free Base Building games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 10,960 | 7/9/2024 | 77 | Free | Steam Charts | |
| 4,210 | 10/15/2020 | 84 | Free | Steam Charts | |
| 2,906 | 5/5/2020 | 77 | Free | Steam Charts | |
| 1,886 | 3/29/2017 | 87 | Free | Steam Charts | |
| 1,147 | 6/5/2021 | 92 | Free | Steam Charts | |
| 727 | 11/30/2025 | 84 | Free | Steam Charts | |
| 593 | 12/11/2017 | 61 | Free | Steam Charts | |
| 545 | 12/5/2025 | 71 | Free | Steam Charts | |
| 537 | 10/8/2019 | 84 | Free | Steam Charts | |
| 526 | 6/25/2023 | 64 | Free | Steam Charts | |
 | 518 | 5/22/2024 | 67 | Free | Steam Charts | |
 | 492 | 3/15/2018 | 73 | Free | Steam Charts | |
 | 393 | 4/24/2025 | 49 | Free | Steam Charts | |
 | 358 | 2/27/2012 | 63 | Free | Steam Charts | |
 | 355 | 6/15/2017 | 84 | Free | Steam Charts | |
 | 342 | 8/31/2022 | 89 | Free | Steam Charts | |
 | 302 | 8/17/2023 | 97 | Free | Steam Charts | |
 | 300 | 7/2/2021 | 54 | Free | Steam Charts | |
 | 273 | 9/18/2014 | 71 | Free | Steam Charts | |
 | 263 | 5/6/2021 | 88 | 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. (2026, April 23). Steam Store. Steam Store.
- Valve Corporation. (2026, April 23). Once Human on Steam. Steam Store.
- Valve Corporation. (2026, May 1). Age of Empires III: Definitive Edition on Steam. Steam Store.
- Valve Corporation. (2026, April 28). Shop Titans on Steam. Steam Store.
- Valve Corporation. (2026, May 2). Fallout Shelter on Steam. Steam Store.
- Valve Corporation. (2026, April 11). Muck on Steam. Steam Store.
- Valve Corporation. (2026, April 20). The Perfect Tower II on Steam. Steam Store.
- Valve Corporation. (2026, May 2). March of Empires on Steam. Steam Store.
- Valve Corporation. (2026, April 7). Cividle on Steam. Steam Store.
- Valve Corporation. (2026, April 17). War Selection on Steam. Steam Store.
- Valve Corporation. (2026, April 30). Doomsday × Ghost in the Shell on Steam. Steam Store.