73%Strong matchFounders' Fortune
82%2k82% positive reviews, Very Positive across 2k reviews·Colony Sim · Base Building
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Carve out and manage vast underground colonies! Build chambers, mine resources, and watch your settlement thrive. Assign specialized roles to your residents, then dig deeper to uncover ancient caves, precious resources, and mysterious tombs that unlock new possibilities.
Fosoria
SteamFosoria is an underground colony builder. Take care of your residents, make sure their needs are met, and watch them thrive. Over time, they'll take on different roles and become a real part of your growing underground community.
Dig out tunnels and chambers to shape your colony however you want. Mine for ores, rare crystals, and other resources to keep your expansion going. Every section you dig opens new space for growth, allowing you to carefully plan the layout and structure of your colony.


Construct all kinds of specialized rooms, each with its own purpose in your colony. From cozy living quarters to bustling workshops, storage areas, and kitchens. How you set them up is entirely up to you. Arrange furniture, add decorations, and craft new items to make each room feel just right.

Expansion leads to discovery. As you dig further, you'll stumble upon hidden caves, ancient tombs, and unfamiliar environments. Each new area introduces new resources to gather. Send your explorers on expeditions, uncover relics of the past, and unlock new crafting options, room types, and colony upgrades.


Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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