Free Colony Sim Games on Steam
Steam currently has 1,184 Colony Sim 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 Colony Sim game rankings were last updated on 12/12/2025.
Looking for more? Explore other lists such as:
- Best colony sim games on Steam
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- Free Steam games
- Most played Steam games
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1. My Singing Monsters
Dive into the Musical World of My Singing Monsters! Breed them, feed them, listen to them sing! Breed & collect a menagerie of Monsters, each a living instrument! Build your paradise across 35+ Islands, customize your world, and enjoy endless music! There's never a dull moment in the Monster World!
My Singing Monsters holds the #1 spot for "best free Colony Sim game on Steam" with a Player Score of 92. Its score was calculated by analyzing a total of 44,319 reviews on Steam. This breaks down to a total of 41,537 positive reviews and 2,782 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 | 3/24/2021 |
| Franchise | Big Blue Bubble |
| Developer | Big Blue Bubble |
| Publisher | Big Blue Bubble |
| Steam App Id | 1419170 |
2. Stronghold Kingdoms
A massively multiplayer grand strategy game, Stronghold Kingdoms is about forging alliances, political mind games, city-building and castle sieges with thousands of other players!
Stronghold Kingdoms has achieved a Player Score of 63, placing it in the #2 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 9,435 reviews on Steam. This breaks down to a total of 6,027 positive reviews and 3,408 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 Stronghold Kingdoms on the Steam Deck.
| Release Date | 2/27/2012 |
| Franchise | Firefly Studios |
| Developer | FireFly Studios |
| Publisher | FireFly Studios |
| Steam App Id | 47410 |
3. DFHack - Dwarf Fortress Modding Engine
Extensions for Dwarf Fortress, including bugfixes, interface improvements, automation agents, design blueprints, modding building blocks, and other tools.
DFHack - Dwarf Fortress Modding Engine has achieved a Player Score of 93, placing it in the #3 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 914 reviews on Steam. This breaks down to a total of 909 positive reviews and 5 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play DFHack - Dwarf Fortress Modding Engine on the Steam Deck (though some functionality may be limited).
| Release Date | 4/14/2023 |
| Developer | The DFHack Team |
| Publisher | The DFHack Team |
| Steam App Id | 2346660 |
4. Shelter 69
Expand your shelter in a unique take on the post-apocalypse genre, thrown straight into a wild world where women reign supreme across the wastelands. You are the last male, and all is for your taking.
Shelter 69 has achieved a Player Score of 62, placing it in the #4 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 1,889 reviews on Steam. This breaks down to a total of 1,191 positive reviews and 698 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Shelter 69 on the Steam Deck (though some functionality may be limited).
5. Rock the Islands
Team up with friends and dive into adventure! Rescue dwellers, let them work for you so they farm resources and protect you from enemies. Upgrade your equipment, explore new lands, complete quests and fight evil with glory!
Rock the Islands has achieved a Player Score of 81, placing it in the #5 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 229 reviews on Steam. This breaks down to a total of 204 positive reviews and 25 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 Rock the Islands on the Steam Deck (though some functionality may be limited).
| Release Date | 7/26/2024 |
| Developer | HYPE GAME LLC |
| Publisher | HYPE GAME LLC |
| Steam App Id | 2987860 |
6. Diplomacy is Not an Option: Shareware
Diplomacy is Not an Option: Shareware is a free prequel to the original game. In a medieval fantasy world, you are to build settlements, raise huge armies, and defend against massive hordes of enemies. Learn how Ironbrow clan shaped the world's map the first time - if you survive, that is.
Diplomacy is Not an Option: Shareware has achieved a Player Score of 85, placing it in the #6 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 383 reviews on Steam. This breaks down to a total of 354 positive reviews and 29 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
7. Shipping Manager
Create and manage your own shipping empire. Control every aspect from route creation to marketing to staff handling and beat other managers to top the leaderboards.
Shipping Manager has achieved a Player Score of 46, placing it in the #7 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 503 reviews on Steam. This breaks down to a total of 229 positive reviews and 274 negative reviews — making it "Mixed" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play Shipping Manager on the Steam Deck (though some functionality may be limited).
| Release Date | 9/18/2023 |
| Developer | Trophy Games |
| Publisher | Trophy Games |
| Steam App Id | 2445660 |
8. Build Master: MarsVille
Build Master: MarsVille is a city-building and strategy game that invites you to create your Martian colony with your engineering genius and building skills. Form alliances, trade resources, and conquer rival colonies. Embrace the challenge and become the ultimate Build Master on Mars!
Build Master: MarsVille has achieved a Player Score of 42, placing it in the #8 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 234 reviews on Steam. This breaks down to a total of 95 positive reviews and 139 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Build Master: MarsVille on the Steam Deck (though some functionality may be limited).
| Release Date | 12/12/2023 |
| Developers | |
| Publisher | FIRST FUN HONG KONG LIMITED |
| Steam App Id | 2366120 |
9. Kingdom: Classic
Kingdom is a 2D sidescrolling strategy/resource management hybrid with a minimalist feel wrapped in a beautiful, modern pixel art aesthetic.
Kingdom: Classic has achieved a Player Score of 89, placing it in the #9 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 22,366 reviews on Steam. This breaks down to a total of 20,271 positive reviews and 2,095 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.
| Release Date | 10/21/2015 |
| Franchise | 👑 Kingdom Series 👑 |
| Developers | |
| Publisher | Raw Fury |
| Steam App Id | 368230 |
10. Romans: Age of Caesar
Build Rome Together! A co-operative grand strategy MMO from a team of veteran city builders, Romans: Age of Caesar is the latest historical strategy game from Firefly Studios.
Romans: Age of Caesar has achieved a Player Score of 46, placing it in the #10 spot for the best free Colony Sim games. Its score was calculated by analyzing a total of 441 reviews on Steam. This breaks down to a total of 199 positive reviews and 242 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Romans: Age of Caesar on the Steam Deck (though some functionality may be limited).
| Release Date | 4/27/2022 |
| Franchise | Firefly Studios |
| Developer | FireFly Studios |
| Publisher | FireFly Studios |
| Steam App Id | 872570 |
More Free Colony Sim Games
Explore even more rankings for the 92 best free Colony Sim games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 892 | 3/24/2021 | 92 | Free | Steam Charts | |
| 258 | 2/27/2012 | 63 | Free | Steam Charts | |
| 219 | 4/14/2023 | 93 | Free | Steam Charts | |
| 122 | 5/16/2022 | 62 | Free | Steam Charts | |
| 116 | 7/26/2024 | 81 | Free | Steam Charts | |
| 108 | 4/30/2025 | 85 | Free | Steam Charts | |
| 71 | 9/18/2023 | 46 | Free | Steam Charts | |
| 58 | 12/12/2023 | 42 | Free | Steam Charts | |
| 37 | 10/21/2015 | 89 | Free | Steam Charts | |
| 30 | 4/27/2022 | 46 | Free | Steam Charts | |
 | 24 | 9/12/2024 | 58 | Free | Steam Charts | |
 | 22 | 9/10/2025 | 79 | Free | Steam Charts | |
 | 10 | 9/21/2023 | 54 | Free | Steam Charts | |
 | 9 | 9/8/2023 | 68 | Free | Steam Charts | |
 | 6 | 1/22/2021 | 61 | Free | Steam Charts | |
 | 5 | 12/1/2025 | 71 | Free | Steam Charts | |
 | 5 | 1/30/2024 | 79 | Free | Steam Charts | |
 | 5 | 2/21/2018 | 53 | Free | Steam Charts | |
 | 5 | 10/7/2022 | 85 | Free | Steam Charts | |
 | 3 | 4/30/2024 | 84 | 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, December 12). Steam Store. Steam Store.
- Valve Corporation. (2025, December 12). My Singing Monsters on Steam. Steam Store.
- Valve Corporation. (2025, November 17). Stronghold Kingdoms on Steam. Steam Store.
- Valve Corporation. (2025, November 24). DFHack - Dwarf Fortress Modding Engine on Steam. Steam Store.
- Valve Corporation. (2025, December 13). Shelter 69 on Steam. Steam Store.
- Valve Corporation. (2025, December 3). Rock the Islands on Steam. Steam Store.
- Valve Corporation. (2025, November 30). Diplomacy is Not an Option: Shareware on Steam. Steam Store.
- Valve Corporation. (2025, November 15). Shipping Manager on Steam. Steam Store.
- Valve Corporation. (2025, December 12). Build Master: MarsVille on Steam. Steam Store.
- Valve Corporation. (2025, December 7). Kingdom: Classic on Steam. Steam Store.
- Valve Corporation. (2025, November 26). Romans: Age of Caesar on Steam. Steam Store.