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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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Alpha 0.15 is now available on Steam! This update took longer than previous updates, and longer than I would have preferred, but there are a lot of great new features, updates and fixes. I’m especially excited about the planet exploration content.

Planetary Exploration

Operations Center

Colonists can now research and build an operations center and map table which allows for remote viewing of the planet surface. There are many new discoveries and resources to be found and exploited.


Remotely controlled vehicles allow for surface exploration, biome scanning and resource harvesting.

Surface Exploration & Mining

The Distance Operated Geo Explorer, or D.O.G.E, will allow colonists to scan biomes for new discoveries and resource information, while the Beetle Miner will allow for resource extraction and hauling.

Biologist Job Role

The Comm Officer has been fired and the new Biologist job position has been added. The Biologist will be responsible for tackling fish-related tasks.

New Discoveries & Research

Many new discoveries and research projects have been added for unlocking new, and some existing, content. Alien Flora/Fauna will now need to be discovered by scanning surface biomes before they can be researched and grown.

Notable Changes

There have been many tweaks and changes to existing craft recipes and construction material requirements. Construction and mining times have been reduced. Colonists will no longer die quite as quickly from starvation. There have been some minor graphics changes, and the camera zoom distance has been increased. These are just some of the changes.
For the full list of additions, changes and fixes, see the release notes below.

For the latest updates and information, be sure to follow Mercury Fallen in the following ways:

Twitter: Twitter.com
Facebook: Facebook.com
Website: Mercuryfallen.com
Discord: Discord.gg

Release Notes


  • Added: Planet Map section in facility management interface
  • Added: Planet Map button to bottom button bar.
  • Added: Planet Surface Map which is explorable using vehicles. Surface allows for additional discoveries and resource harvesting.
  • Added: New Operations Center room floor
  • Added: Map table for operations room. Map table displays surface map and will update in real time as surface is explored. Planet Map interface only available when map table is constructed and has power.
  • Added: Vehicle Assembler for creating vehicles for use on the planet surface.
  • Added: D.O.G.E vehicle for surface biome scanning.
  • Added: Beetle Miner vehicle for surface mining.
  • Added: Background ambient music
  • Added: Several new raw and refined materials for crafting.
  • Added: Surface Analysis research project
  • Added: Surface Mining research project
  • Added: Silica Processing research project
  • Added: Several new research projects related to xenobotany
  • Added: Temperature Unit Setting (Fahrenheit, Celsius or Kelvin)
  • Added: Measuring Unit Setting (Imperial or Metric)
  • Added: Guide topics for surface exploration
  • Added: Biologist Job Role. Biologist job role responsible for handling Aquarium tasks.
  • Added confirmation window/save reminder when quitting to main menu


  • Changed: Alien flora/fauna must now be discovered/researched on the planet surface before it can be grown in crop field/aeroponics farm
  • Changed: Hemp/Potato output increased
  • Removed: Comm Officer Job Role
  • Changed: Increased storage capacity on all containers.
  • Changed: Renamed some research projects for better clarification
  • Changed: Selected research project information updated in research interface.
  • Changed: Notification tabs are now visible when facility management interface is open
  • Changed: Research complete notification now opens research interface when clicked
  • Changed: Research project info now shows more requirement information.
  • Changed: Decreased some research times.
  • Changed: Minor update to the look of crop fields
  • Changed: Colonists will randomly choose an applicable craft station to use. This helps to ensure colonists don’t ignore craft stations that are available.
  • Changed: Cloth now uses hemp.
  • Changed: Steel now uses iron ingots instead of iron ore
  • Changed: Material requirements for various objects/recipes
  • Changed: Materials used for high level stats for robot construction
  • Changed: Medical Bed moved from furniture to utilities section of build interface.
  • Changed: Colonists can now go 1.5 days before they begin to starve from not eating.
  • Changed: Reduced default level of construction sound effect
  • Changed: Decreased navigation grid updates to improve overall performance.
  • Changed: Increased max camera zoom distance
  • Changed: Object construction info will now show warning notice if construction area isn’t clear or floor under object isn’t finished construction


  • Fixed: Notification icons stuck in the middle of the screen after opening an item chest or pressing escape to close side info panel.
  • Fixed: Colonist becoming stuck after deconstructing starting generator
  • Fixed: Colonists able to walk on floor tiles over water even though they aren’t built yet.
  • Fixed: Research project background color shows as being able to be researched when requirements aren’t met in some cases.
  • Fixed: Audio level on colonist window tabs not affected by UI audio setting.
  • Fixed: Construction visual progress effect not updating if object is selected
  • Fixed: Colonist continues researching if research station they are sitting at is deconstructed
  • Fixed: Audio effects getting louder/softer when multiple audio effects are playing
  • Fixed: Storage containers not dropping their contents on the floor when deconstructed
  • Fixed: Colonist stuck in loop trying plant at aeroponics farm if only 1 plant nutrient is available in storage.
  • Fix: Item chests spawning on top of each other in ruined rooms.
  • Fixed: Low/high quality graphics settings were reversed. This meant that setting the graphics settings to high you were actually seeing low quality visual settings.
  • Fixed: Edge scrolling not working if cursor is over object build menu or getting started window.
  • Fixed: Colonist receiving additional quirks when loading a save game.
  • Fixed: Object in mid construction missing build materials when loading save game
  • Fixed: Active research project not set after loading save game.
  • Fixed: Object still constructed if floor isn’t finished construction
  • Fixed: Camera does not switch off power/water overlay if closing deconstruct filters
Developer Log #36 :: Biome Exploration

Developer Log #36 :: Biome Exploration


More information on planetary exploration. Biome scanning, resources, vehicles and more.

Developer Log #35 :: Constructing Vehicles

Developer Log #35 :: Constructing Vehicles


More information regarding vehicle construction and usage for planetary exploration and harvesting.

Developer Log #34 :: Planet Resources

Developer Log #34 :: Planet Resources


New details on planet resources, vehicle construction and more.

Alpha 0.14.4 Now Live

Alpha 0.14.4 Now Live


Alpha 0.14.4 is now live on Steam! This update is another small patch/content update while development continues on the planetary exploration/expansion...


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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RT @mercuryfall: Mercury Fallen was released one year ago today on @steam_games A huge thank you for all the support!… T.co

Oct 16 2018

RT @kendi64YT: Working on more tech and seeing what has been updated in 0.16 in #MercuryFallen Youtube.com @mercuryfall

Oct 15 2018

RT @mercuryfall: Started working on a new discovery interface. Discoveries shown in grouped list and new discoveries are highlighted… T.co

Oct 12 2018

RT @mercuryfall: Mercury Fallen :: Alpha 0.16 Now Live! New content, changes and fixes. #indiegame #videogame #steam #pcgameT.co

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RT @TheGeekCupboard: Mercury Fallen is a futuristic base builder game which is a cross between Dungeon Keeper and Fallout, which in my e… T.co

Oct 9 2018

RT @mercuryfall: Alpha 0.16 Test Build Now Available! Mercuryfallen.com

Oct 5 2018

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