Free Base Building Games on Steam
Steam currently has 3,871 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 10/24/2025.
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 76. Its score was calculated by analyzing a total of 153,269 reviews on Steam. This breaks down to a total of 117,085 positive reviews and 36,184 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. 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 50,517 reviews on Steam. This breaks down to a total of 42,944 positive reviews and 7,573 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 17,284 reviews on Steam. This breaks down to a total of 13,487 positive reviews and 3,797 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 75,942 reviews on Steam. This breaks down to a total of 67,143 positive reviews and 8,799 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 178,413 reviews on Steam. This breaks down to a total of 166,810 positive reviews and 11,603 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. 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 62, placing it in the #6 spot for the best free Base Building games. Its score was calculated by analyzing a total of 1,752 reviews on Steam. This breaks down to a total of 1,111 positive reviews and 641 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).
7. Habbo Hotel: Origins
A pixel-art social simulation MMO where you customize your avatar, build and decorate rooms, trade rare items, and join live community events in a nostalgic yet ever-evolving virtual world.
Habbo Hotel: Origins has achieved a Player Score of 59, placing it in the #7 spot for the best free Base Building games. Its score was calculated by analyzing a total of 666 reviews on Steam. This breaks down to a total of 399 positive reviews and 267 negative reviews — making it "Mixed" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
8. 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 #8 spot for the best free Base Building games. Its score was calculated by analyzing a total of 38,980 reviews on Steam. This breaks down to a total of 38,607 positive reviews and 373 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 |
9. 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 48, placing it in the #9 spot for the best free Base Building games. Its score was calculated by analyzing a total of 3,602 reviews on Steam. This breaks down to a total of 1,709 positive reviews and 1,893 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.
10. Realm Grinder
Grow your realm, build alliances, and explore one of the deepest idle RPGs ever!
Realm Grinder has achieved a Player Score of 84, placing it in the #10 spot for the best free Base Building games. Its score was calculated by analyzing a total of 7,221 reviews on Steam. This breaks down to a total of 6,286 positive reviews and 935 negative reviews — making it "Very Positive" on Steam.
It 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.
| Release Date | 6/15/2017 |
| Franchise | Kongregate |
| Developer | Divine Games |
| Publisher | Kongregate |
| Steam App Id | 610080 |
More Free Base Building Games
Explore even more rankings for the 100 best free Base Building games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 16,057 | 7/9/2024 | 76 | Free | Steam Charts | |
| 3,282 | 10/15/2020 | 84 | Free | Steam Charts | |
| 2,795 | 5/5/2020 | 77 | Free | Steam Charts | |
| 1,160 | 3/29/2017 | 87 | Free | Steam Charts | |
| 950 | 6/5/2021 | 92 | Free | Steam Charts | |
| 622 | 12/11/2017 | 62 | Free | Steam Charts | |
| 564 | 10/15/2025 | 59 | Free | Steam Charts | |
| 541 | 8/17/2023 | 97 | Free | Steam Charts | |
| 539 | 4/24/2025 | 48 | Free | Steam Charts | |
| 497 | 6/15/2017 | 84 | Free | Steam Charts | |
 | 487 | 6/26/2023 | 64 | Free | Steam Charts | |
 | 463 | 2/26/2021 | 84 | Free | Steam Charts | |
 | 404 | 5/22/2024 | 68 | Free | Steam Charts | |
 | 387 | 10/8/2019 | 84 | Free | Steam Charts | |
 | 386 | 3/15/2018 | 74 | Free | Steam Charts | |
 | 353 | 2/27/2012 | 63 | Free | Steam Charts | |
 | 324 | 2/16/2024 | 72 | Free | Steam Charts | |
 | 318 | 7/2/2021 | 57 | Free | Steam Charts | |
 | 297 | 8/31/2022 | 89 | Free | Steam Charts | |
 | 281 | 9/18/2014 | 69 | 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 24). Steam Store. Steam Store.
- Valve Corporation. (2025, October 24). Once Human on Steam. Steam Store.
- Valve Corporation. (2025, October 20). Age of Empires III: Definitive Edition on Steam. Steam Store.
- Valve Corporation. (2025, October 23). Shop Titans on Steam. Steam Store.
- Valve Corporation. (2025, October 25). Fallout Shelter on Steam. Steam Store.
- Valve Corporation. (2025, September 23). Muck on Steam. Steam Store.
- Valve Corporation. (2025, October 20). March of Empires on Steam. Steam Store.
- Valve Corporation. (2025, October 24). Habbo Hotel: Origins on Steam. Steam Store.
- Valve Corporation. (2025, October 13). HoloCure - Save the Fans! on Steam. Steam Store.
- Valve Corporation. (2025, October 22). DARKEST DAYS on Steam. Steam Store.
- Valve Corporation. (2025, October 24). Realm Grinder on Steam. Steam Store.