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Manage a group of colonists as they attempt to survive underground on an alien world. Automated machine construction was sent ahead to create the Mercury facility, but something has gone wrong and your colonists awake to find the facility in ruin. Build structures, research new technologies and send out expeditions to the surface to ensure the survival of your new found home away from home.

Mercury Fallen is heavily inspired by games such as Banished, Dungeon Keeper II and RimWorld. While there is no plan for combat, there will certainly be challenges your colonists will face.

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New Beginnings Update


Howdy Folks!

I’m extremely excited to announce that Update 23 is now live! Update 23 brings many new changes and additions, such as an updated power system, new world generation, starting conditions and even brand new colonist models.

Important Note: While existing save games should work it is recommended to start a new game in Update 23.


Colonists have had a face, and body, lift: the update includes new colonist models, outfits and animations.

Colonist stress has been reworked and is now only affected by attribute effects instead of gradually increasing or decreasing based on decor. New stress attribute effects have been added that reflect the colonists current environment. More stress-related attribute effects will be added in future updates.

Colonists will now use benches and chairs when they have nothing else to do instead of only when their stress is high.

Starting Conditions

Some radical changes have been added to world generation which affect early game progression. When you start a new game (highly recommended), you will start with just stasis capsules, a robot and starting supply chest. The Getting Started tutorial has been updated to guide new and existing players.

Power Generation

The power system has been completely rewritten from the ground up to improve power delivery time and performance and to offer new mechanics. A solar panel is now available on the surface side facility which can be connected to via the elevator.

Batteries can now be constructed to store additional power.

The new power system was built to provide the foundation for more surface side content in future.

And More…

New naturally spawning plants have been added that can be harvested using the new harvest mechanic.

There have been many tweaks to gathered resource amounts, construction costs, research costs and more.

Check out the release notes below for the full list of additions, changes and fixes.

For more info including release notes be sure to check out the game on Steam.

Follow Mercury Fallen development on
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Dev Log #53 :: Colonist Improvements

Dev Log #53 :: Colonist Improvements


A peek at some of the things coming in the next content update.

Dev Log #52 :: Roadmap

Dev Log #52 :: Roadmap


Overview of what's in store in coming content updates including changes to world gen, game balance, farming and construction.

Update 22 :: UI Improvements

Update 22 :: UI Improvements


Update 22 brings a whole bunch of new user interface changes, bug fixes and a few other tweaks.

Update 21 :: Expeditions

Update 21 :: Expeditions


Expeditions update is now available on Steam. The largest update to date brings expeditions, surface construction, research overhaul and a whole lot more...


how do the computers work? I tried everything :(

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danto Creator

The computer station needs a colonist set to the scientist profession and an active data recovery project. The computer station will also need power conduits to connect it to power. Hope that helps and thanks for checking out the game.

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Is it ha clone chamber available for use i have the demo I think.

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danto Creator

The clone chamber is available for use in the latest update which was released on itch.io yesterday. Thanks for playing!

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Latest tweets from @tpelham42

RT @mercuryfall: Join me on @PyroFalkon Streaming Sundays this Sunday at 4pm EST where he'll take a fresh new look at Mercury Fallen… T.co

22hours ago

My amazing girlfriend got a huge news scoop. Check it out! T.co

23hours ago

RT @mercuryfall: Patch Update 23.3 Now Live! A couple of changes and fixes. Steamcommunity.com #indiedev #gamedev #indiegame #pcgame #gaming #videogames

Feb 17 2020

RT @mercuryfall: @SplattrCatGames takes a fresh new look at Mercury Fallen Youtube.com #indiegame #pcgame #letsplay #videogames

Feb 15 2020

RT @mercuryfall: Patch Update 23.2 Hot Fix Now Live! Fixes a critical issue with not being able to load saved games.… T.co

Feb 10 2020

RT @mercuryfall: Patch Update 23.2 Now Available! #indiegame #pcgame #indiedev #gamedev #gaming Mercuryfallen.com

Feb 10 2020

RT @mercuryfall: Patch Update 23.1 Fixes Up Some Reported Issues #indiedev #indiegame #pcgame #gamedev #pcgaming Mercuryfallen.com

Feb 3 2020

RT @BU4UGaming: As update 23 is finally out it's of course time to kick off a new #MercuryFallen series: Youtu.be 😊… T.co

Jan 31 2020

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