Dig, Build & Explore. 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. Your colonists awake to find the facility in ruin.
All Reviews:
Positive (37) - 89% of the 37 user reviews for this game are positive.
Release Date:
Oct 16, 2017

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“As the sole developer of Mercury Fallen, early access is a great way to support the project and build a community of players that can assist in its development through feedback, reporting and exposure. The game has already benefited greatly from community feedback and through Early Access I hope to continue to grow the community as the game evolves. Join the adventure and help make Mercury Fallen the best it can be.”

Approximately how long will this game be in Early Access?

“While the game is very playable and enjoyable, there is still ground to cover with new content and updates. As a sole developer it's challenging to properly estimate how long it will take to get to final release. I'm dedicated to releasing regular updates to the game and currently plan to release in 2019.”

How is the full version planned to differ from the Early Access version?

“The focus of Mercury Fallen is building and exploration. Many of the core elements of building and management are in place, but will continue to be expanded upon. As development continues more focus will be put on exploration with the addition of discoveries, surface expeditions, story content and more.

Planned Features

  • Expanded technology tree
  • More crops and natural resources
  • Alien artifacts
  • Additional Cloning options / genetics
  • Trading
  • Planet Surface construction
  • Additional Story content
  • Various Surface exploration and exploitation
  • Support for player created mods

What is the current state of the Early Access version?

“The game has many hours of content and has been enjoyed by many users. The game contains most of the core elements that will continue to be added upon. In the current version of the game, the player can mine and grow resources, refine materials at crafting stations and expand the facility with additional rooms, machines and decorations. Manage colonist quirks, ailments and customization options. Explore and exploit the planet surface. The focus of the game is to build, expand and explore.

Players can manage power/water distribution, resource management and more. The game has a solidly playable and enjoyable foundation and I will add even more great content.

Current Features

  • Mine and grow raw materials
  • Refine materials at various stations
  • Design and build facility rooms, machines and decorations
  • Manage colonists’ jobs and needs
  • Handle colonists’ injury and ailments
  • Control colonists’ names, jobs and outfit colors
  • Research new technologies
  • Explore the planet surface for discoveries and resources
  • Take advantage of procedural generation, so that each new game is a new experience.
  • Grow clones, build robots and find additional colonists hidden in collapsed areas of the map

Will the game be priced differently during and after Early Access?

“The game will most likely increase in price after early access.”

How are you planning on involving the Community in your development process?

“Most games are only as good as the community behind it. As a single developer, it's not always easy to address all individual concerns, but I am eager to communicate with my audience via email, community forums and social media. I do my best to listen to player feedback and deliver on what makes sense for the game. I also plan to involve the community in optional test versions of the game before main game updates.”
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Recent updates View all (60)

January 11

Developer Log #44 :: Mods 'N' Modes

Hope everyone is having a great new year so far. I have some big plans for 2019. First up is an update that focuses on bringing initial mod support to Mercury Fallen.

The next update will add in official support for XML mods that can tweak existing content or add new content such as additional languages. Mods that add new artwork and Steam Workshop support are currently being investigated, but may not make it into this update. This is only the beginning, and further support will be added in future updates.

A Test Build will be available next week for those who want to test mod support. Your feedback will be very helpful in identifying what the community wants and needs. Additional information and guides will be made available for those interested in creating or using mods.

Display Modes

While mod support is the major focus of Update 19, I've also added new display modes for the surface map. The Discovered Biomes display mode shows discovered biomes in green and undiscovered biomes in red. This will help explorers track down missing biomes.

Additionally there are display modes for temperature, moisture and elevation. While these tile attributes are not critical at the moment, they will play a part in some of the planned content in development.

What type of mods do you want to see? If you're interested in creating mods for Mercury Fallen, please reach out and let me know the types of mods you want to create. Thank you all for a great 2018 and I look forward to creating some exciting new content in 2019!
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December 26, 2018

Update 18 Now Live!

Howdy Pioneers!

Update 18 is now available, with many additions, changes, fixes and performance tweaks. A big thank you to to everyone who provided feedback on the test build.

Facility Minimap

View your entire facility with the new facility minimap. The minimap shows your facility, camera view area and colonists. You can now quickly navigate to different areas by clicking on the minimap. Speed and overlay controls have been updated and shifted to new positions on the screen to accommodate the new minimap interface.

Robot Recycler

The robot recycler finally lets you scrap robots you no longer need and get some resources back. The robot info panel now has a recycle button which will instruct the robot to be recycled. The robot will seek out the first available robot recycler and be recycled.

Save Game Interface

A new save game interface has been added that allows you to create a new save game, overwrite an existing game and name your saved games. An auto save feature has also been added. By default, the game will auto save every 10 minutes, but this can be adjusted or turned off in settings. The Quit To Main Menu save confirmation has been removed, as the game will now generate an auto save when returning to the main menu.

UI Tweaks

I've made minor tweaks to various UI elements, but the most notable are the changes to the color picker and main menu interface. The color picker has a new look and many more color choices. The main menu has been updated and has a Continue button, which will load the latest saved game.

Fixes & Performance Tweaks
Thanks to your support I've been able to hunt down and fix various bugs that affect colonist behavior and more. Several tweaks have been added to improve performance during the later part of the game. Keep those bug reports coming! :)


Follow Mercury Fallen development on:

Twitter: https://twitter.com/mercuryfall
Facebook: https://www.facebook.com/mercfall/
Website: http://www.mercuryfallen.com
Discord: https://discord.gg/WdndeXx

Release Notes
  • Added: Facility Minimap
  • Added: Robot Recycler. Will receive 50% of of robot materials when robot is recycled.
  • Added. Recycle button added to robot info panel. The robot will automatically seek out an available robot recycler when marked for recycling. They will continue doing other jobs if one is not readily available.
  • Added new Save Game interface that allows for custom file names and overwriting existing saves
  • Game will now auto save at regular intervals.
  • Added game setting for adjusting or disabling auto save time interval. Defaults to every 10 minutes.
  • Removed quit to menu save confirmation screen. Game will now generate an auto save upon quit.
  • Updated look of load game interface
  • Updated color picker interface
  • Increased amount of colors in color picker
  • Color picker colors now defined in xml files
  • Day and time info now shown next to minimap
  • Game speed buttons moved to top of minimap
  • Overlay buttons moved to side of minimap
  • Craft queue add/edit item window now shows item type drop down, where applicable.
  • When hungry and going to a container with food, a colonist will attempt to get enough food to deplete their hunger.
  • Reduced time it take to eat a single item of food. Colonists will take longer to eat when eating multiple low satiation foods. More satiating foods will decrease the time it takes to eat as the colonist will eat less in one sitting.
  • Minor decrease to default hunger rate
  • Raw Potato satiation increased to 18%
  • Fixed: Colonist becoming stuck if object is deconstructed while colonists is en-route to drop of materials.
  • Fixed: Colonists not receiving hauler experience for dropping off materials to construction site.
  • Fixed: Unable to remove equipment items in some instances
  • Fixed: Performance issue related to power/water resource distribution over conduits
  • Fixed: Performance issue with various colonist actions related to finding valid job targets
  • Fixed: Performance issue when calculating attributes for colonists/objects
  • Fixed: Additional minor performance improvements and lowered memory consumption
  • Fixed: Colonists not choosing highest quality food in a container item when going to eat.
  • Fixed: Multiple colonists attempting to install equipment on the same object
  • Fixed: Craft item action not showing item name in action description
  • Fixed: Wasp showing incorrect icon/name/description in info window
  • Fixed: Colonist need values (Hunger/Fatigue/Stress) going above maximum value in some instances
  • Fixed: Colonists stuck if stress is at max, but there is no way to relieve stress.
  • Fixed: Allowed items for containers not saving
  • Fixed: Equipment items not showing in allowed items interface
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About This Game

The game is in the early access alpha stage and is not yet feature complete. Please read the Early Access info at the top for more details.

Manage a group of intrepid colonists as they attempt to survive on an alien world. Automated machine construction was sent ahead to create the underground Mercury Facility, but something has gone wrong. Your colonists awake to find the facility in ruin. Expand the colony, grow crops, build structures, recover technologies and discover lost secrets to ensure the survival of your new home away from home.

Mercury Fallen is a simulation game which focuses on building, crafting and exploration. The choices you make will decide the fate of your colony.

Dig & Explore

Dig out and explore the surrounding area for raw resources and discover lost colonists, collapsed facility rooms, discoveries and more.

Grow & Manage Resources

Grow terrestrial and assorted alien crops for materials and meal production. Manage production chains to turn raw ingredients into meals, building materials and robots.

Manage Colonists

Colonists are indirectly controlled by placing buildable objects, managing craft queues/rosters at production stations, assigning job roles and configuring job priorities. Each colonist has their own set of quirks which affects a colonist in various ways.

Surface Exploration

Explore the planet surface in search of new resources and discoveries.

Discoveries & Technology

Discover blueprints and data logs hidden away in lost item chests to uncover new technology and story content. Manage research projects to unlock numerous machines, structures, recipes and more.

  • Grow clones and assemble robots to expand your facility population
  • Manage colonists’ injuries, ailments, jobs, quirks and needs
  • Grow various terrestrial and alien crops for material and meal production.
  • Uncover additional colonists, robots and discoveries hidden in collapsed sections of the Mercury Facility
  • Build and manage power and water resources.
  • Customize your colonists name and outfit colors
  • Research technology to unlock new structures, recipes, crops and more.
  • In game guide
  • Take advantage of procedural generation, so that each new game is a new experience.
  • * Take on missions and uncover various history and information through choice driven story narratives.

* = Planned features still in development

System Requirements

Mac OS X
    • OS: Windows 7 / 8 / 10
    • Processor: 2.4 GHz Dual Core
    • Memory: 4 GB RAM
    • Graphics: DirectX 11 compatible card (shader model 3)
    • DirectX: Version 11
    • Storage: 300 MB available space
    • Memory: 8 GB RAM
    • Additional Notes: 64-bit CPU and OS
    • OS: OS X 10.9+
    • Processor: 2.4 Ghz Intel Core i5
    • Memory: 4 GB RAM
    • Graphics: Intel HD 4600 (AMD or NVIDIA equivalent)
    • Storage: 300 MB available space
    • Additional Notes: 64-bit CPU and OS
    • Memory: 8 GB RAM
    • Additional Notes: 64-bit CPU and OS

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