Free Base Building Games on Steam
Steam currently has 3,585 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 6/27/2025.
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 73. Its score was calculated by analyzing a total of 132,455 reviews on Steam. This breaks down to a total of 98,165 positive reviews and 34,290 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 |
| Publisher | Starry Studio |
| Steam App Id | 2139460 |
2. 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 #2 spot for the best free Base Building games. Its score was calculated by analyzing a total of 17,007 reviews on Steam. This breaks down to a total of 13,304 positive reviews and 3,703 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 |
3. 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 83, placing it in the #3 spot for the best free Base Building games. Its score was calculated by analyzing a total of 48,623 reviews on Steam. This breaks down to a total of 41,205 positive reviews and 7,418 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 |
4. 江湖客栈-The Jianghu
Hey,you! This is not a place where the Beggar's can come in and beg for help! Without 100k silver coins, never think you can use our "Jianghu Inn" sign. what? Surprisingly, we managed to get together! Do you really want to give it a try?
江湖客栈-The Jianghu has achieved a Player Score of 56, placing it in the #4 spot for the best free Base Building games. Its score was calculated by analyzing a total of 2,312 reviews on Steam. This breaks down to a total of 1,302 positive reviews and 1,010 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play 江湖客栈-The Jianghu on the Steam Deck (though some functionality may be limited).
5. 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 #5 spot for the best free Base Building games. Its score was calculated by analyzing a total of 74,497 reviews on Steam. This breaks down to a total of 65,947 positive reviews and 8,550 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 |
6. 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 #6 spot for the best free Base Building games. Its score was calculated by analyzing a total of 176,132 reviews on Steam. This breaks down to a total of 164,824 positive reviews and 11,308 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).
7. DARKEST DAYS
DARKEST DAYS is a zombie shooting RPG set in a post-apocalyptic world devastated by a sudden zombie outbreak. Explore a dark yet captivating open world, build a sanctuary with fellow survivors, grow stronger, and fight for survival.
DARKEST DAYS has achieved a Player Score of 46, placing it in the #7 spot for the best free Base Building games. Its score was calculated by analyzing a total of 2,689 reviews on Steam. This breaks down to a total of 1,225 positive reviews and 1,464 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 DARKEST DAYS on the Steam Deck.
8. 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 63, placing it in the #8 spot for the best free Base Building games. Its score was calculated by analyzing a total of 1,690 reviews on Steam. This breaks down to a total of 1,087 positive reviews and 603 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).
9. HoloCure - Save the Fans!
Play as your favorite Vtubers from Hololive! Fight, explore, and clear your way through armies of fans and save them from their mind-control in this unofficial free fan-game.
HoloCure - Save the Fans! has achieved a Player Score of 97, placing it in the #9 spot for the best free Base Building games. Its score was calculated by analyzing a total of 38,122 reviews on Steam. This breaks down to a total of 37,755 positive reviews and 367 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play HoloCure - Save the Fans! on the Steam Deck (though some functionality may be limited).
| Release Date | 8/17/2023 |
| Developer | KayAnimate |
| Publisher | KayAnimate |
| Steam App Id | 2420510 |
10. SUPREMACY: WORLD WAR 3
This Long Term Strategy Game lets you take control of the armed forces of your nation. Become responsible for its military expansion, technological research and economic development. Form alliances and wage total war for global dominance on the battlefields of World War 3.
SUPREMACY: WORLD WAR 3 has achieved a Player Score of 75, placing it in the #10 spot for the best free Base Building games. Its score was calculated by analyzing a total of 5,318 reviews on Steam. This breaks down to a total of 4,071 positive reviews and 1,247 negative reviews — making it "Mostly Positive" 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 SUPREMACY: WORLD WAR 3 on the Steam Deck.
| Release Date | 3/15/2018 |
| Developer | Dorado Games |
| Publisher | Dorado Games |
| Steam App Id | 784950 |
More Free Base Building Games
Explore even more rankings for the 100 best free Base Building games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 18,291 | 7/9/2024 | 73 | Free | Steam Charts | |
| 2,971 | 5/5/2020 | 77 | Free | Steam Charts | |
| 2,598 | 10/15/2020 | 83 | Free | Steam Charts | |
| 1,111 | 9/1/2024 | 56 | Free | Steam Charts | |
| 940 | 3/29/2017 | 87 | Free | Steam Charts | |
| 700 | 6/5/2021 | 92 | Free | Steam Charts | |
| 651 | 4/23/2025 | 46 | Free | Steam Charts | |
| 628 | 12/11/2017 | 63 | Free | Steam Charts | |
| 574 | 8/17/2023 | 97 | Free | Steam Charts | |
| 481 | 3/15/2018 | 75 | Free | Steam Charts | |
 | 426 | 6/15/2017 | 85 | Free | Steam Charts | |
 | 390 | 6/26/2023 | 64 | Free | Steam Charts | |
 | 378 | 2/26/2021 | 85 | Free | Steam Charts | |
 | 370 | 5/22/2024 | 69 | Free | Steam Charts | |
 | 310 | 8/31/2022 | 89 | Free | Steam Charts | |
 | 275 | 10/8/2019 | 84 | Free | Steam Charts | |
 | 272 | 9/18/2014 | 67 | Free | Steam Charts | |
 | 262 | 12/14/2015 | 58 | Free | Steam Charts | |
 | 223 | 7/1/2021 | 60 | Free | Steam Charts | |
 | 212 | 2/28/2012 | 63 | 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, June 27). Steam Store. Steam Store.
- Valve Corporation. (2025, June 27). Once Human on Steam. Steam Store.
- Valve Corporation. (2025, June 26). Shop Titans on Steam. Steam Store.
- Valve Corporation. (2025, June 26). Age of Empires III: Definitive Edition on Steam. Steam Store.
- Valve Corporation. (2025, May 17). 江湖客栈-The Jianghu on Steam. Steam Store.
- Valve Corporation. (2025, June 19). Fallout Shelter on Steam. Steam Store.
- Valve Corporation. (2025, June 8). Muck on Steam. Steam Store.
- Valve Corporation. (2025, June 26). DARKEST DAYS on Steam. Steam Store.
- Valve Corporation. (2025, June 25). March of Empires on Steam. Steam Store.
- Valve Corporation. (2025, May 25). HoloCure - Save the Fans! on Steam. Steam Store.
- Valve Corporation. (2025, June 4). SUPREMACY: WORLD WAR 3 on Steam. Steam Store.