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 underground Mercury facility, but something has gone wrong. Your colonists awake to find the facility in ruin.
All Reviews:
Positive (28) - 89% of the 28 user reviews for this game are positive.
Release Date:
Oct 16, 2017

Sign in to add this item to your wishlist, follow it, or mark it as not interested

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 than 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 playable and enjoyable, there is still ground to cover with new content and updates. I tentatively estimate the final version will be released in late 2018 or early 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
  • More machines and possible upgrades
  • Explore the planet surface and uncover secrets and expansion opportunities
  • Discoverable items
  • Alien artifacts
  • Additional Cloning options and genetics
  • Deeper robotics system
  • Support for player created mods

What is the current state of the Early Access version?

“The game is in a playable state and has been enjoyed by many users via its initial release on platforms outside of Steam. The game contains many 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. 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
  • Recover corrupted data to learn new blueprints
  • Take advantage of procedural generation, so that each new game is a new experience.
  • Grow clones and find additional colonists and robots 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 between main game updates.”
Read more

Buy Mercury Fallen


Recent updates View all (26)

April 20

Alpha 0.14 :: Test Build Update

Howdy Folks! A quick patch update is now available for the Alpha 0.14 Test Build branch. The patch fixes up a few important issues.

Patch Notes
  • Changed: Reduced normal hunger change rate to avoid colonists overeating raw ingredients before they are able to be cooked.
  • Changed: Food processor no longer requires water
  • Fixed: Change Research button on computer station info window opening old research interface instead of new tech tree.
  • Fixed: Bio-Lab floor missing description
  • Fixed: Meal items with missing descriptions
  • Fixed: Tooltips going off the edge of the screen.
  • Fixed: Multiple colonists attempting to treat patient at Medi-Bed causing some colonists to become stuck

For more info and, if you check out the Test Build branch, be sure to leave feedback on the Alpha 0.14 Test Build thread:
0 comments Read more

April 19

Alpha 0.14 :: Test Build Now Available!

Alpha 0.14 is now available for testing! Alpha 0.14 brings a host of new additions including new crops, crafting recipes, rooms, objects and more!

Click below for information about what the Test Build branch is and how to access it:

For more information about this version, including the full release notes, check out the Alpha 0.14 Test Build discussion:



The Bio-Lab room has been added and can be populated with Algae Farms, Aeroponics Farms and Aquariums for growing new crop types. The Aeroponics Farm allows for faster growth and greater output for existing plant crops.

The research interface has been completely rebuilt as a visual tech tree. New research projects have also been added to unlock some of the new recipes/machines.

9 new food/meal recipes have been added. The food processor is required for processing some raw food ingredients into usable items for cooking. Meals no longer completely deplete the hunger meter, but is now based on nutrition and satiation values. More information added to in game guide under Needs.

Roster Management
Various production machines now have a colonist roster which allows players to manage what colonists can operate that machine. Colonists will only work at machines with an empty roster or a machine that has their name on the roster.

Alpha 0.14 has a lot more additions/changes and fixes. For more information and the full release notes check out the Test Build Discussion:
9 comments Read more
See all discussions

Report bugs and leave feedback for this game on the discussion boards

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 For Resources

Mine the surrounding area for valuable raw resources. Refine raw materials for use in facility expansion.

Grow Crops

Grow crops for both food and materials.

Manage Colonists

A healthy colonist is a happy colonist. Manage colonist job roles, injuries and ailments. Each colonist may have their own set of Quirks which affects a colonist in various ways. Colonists screen allows for easy management of job roles and monitoring over all facility health.

Power & Water

Design and layout your power and water lines. Manage fuel consumption and strategically place power and water generators to ensure resources can cover the distance to devices in need.


  • Manage colonists’ injuries, ailments, jobs, quirks and needs
  • Refine materials and build technology at various stations in order to design and create facility rooms, machines, decorations and more.
  • Discover additional colonists and robots hidden in collapsed areas of the map
  • Customize your colonists name and outfit colors
  • Recover corrupted data to learn new blueprints and recipes
  • Take advantage of procedural generation, so that each new game is a new experience.
  • Grow clones and assemble robots to expand your facility population

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
Customer reviews
High Volume of Reviews Detected:
Exclude  or  View Only
Review Type

Purchase Type


Date Range
To view reviews within a date range, please click and drag a selection on a graph above or click on a specific bar.

Show graph

Display As:
Review Beta NEW!
When enabled, will sort reviews by new Helpfulness score. Read more about it in the blog post.
Show graph
Hide graph
Review Helpfulness Beta Enabled
There are no more reviews that match the filters set above
Adjust the filters above to see other reviews
Loading reviews...