A downloadable game for Windows and macOS

Buy Now$24.99 USD or more

Sci-fi colony management with a focus on expansion and exploration. Dig out the underground and explore the surface of an alien world as you rebuild your facility, grow your colony, manage colonists and robots and discover the mysteries of a new home light years from Earth.

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


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


Colonists are indirectly controlled by placing build-able 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.


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


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.
  • Research technology to unlock new structures, recipes, crops and more.
  • Send your colonists to explore points of interest on the surface
  • Customize your colonists name and outfit colors
  • Take advantage of procedural generation, so that each new game is a new experience.

Mercury Fallen is being developed by Tim Pelham which is the entire team of Nitrous Butterfly

Website | Discord | Twitter | Facebook

Minimum System Requirements


OS: Windows 7 / 8 / 10
Processor: 2.4 GHz Dual Core
Memory: 4 GB RAM
Graphics: DirectX 9.0c compatible card (shader model 3)
Storage: 200 MB available space


OS:  OS X 10.8 
Processor: 2.4 Ghz Intel Core i5
Memory: 4 GB RAM
Graphics: DirectX 9.0c compatible card (shader model 3)
Storage: 200 MB available space

Updated 6 days ago
PlatformsWindows, macOS
Rated 4.0 out of 5 stars
(14 total ratings)
AuthorNitrous Butterfly
GenreSimulation, Strategy, Survival
Made withAdobe Photoshop, Unity, Substance Painter & designer, 3ds Max
Tags3D, colony, Crafting, Procedural Generation, Sci-fi
Average sessionA few hours
InputsKeyboard, Mouse
LinksSteam, Homepage, Twitter, Steam, Community, Patreon


Buy Now$24.99 USD or more

In order to download this game you must purchase it at or above the minimum price of $24.99 USD. You will get access to the following files:

Mercury Fallen - Mac 244 MB
Version 1.04
Mercury Fallen - Win 252 MB
Version 1.04

Development log

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(1 edit) (+1)

This is really fun!... Except for the colonist glitch. I really enjoy the concept and gameplay of this, but my game got to a point where nothing was happing. I read some others talking about how the colonists aren't doing anything, so I assume I'm having the same problem. Please fix it, and keep up the great work!


Every time I play this game everyone randomly freezes and stops moving. I hope you fix this issue soon and I'd definitely recommend this game to my friends. and I know for a fact a huge YouTuber called Markiplier would definitely be interested in playing this mainly because of the fact its in space. Keep up the awesome work! and ill be recommending this to all my friends as well because we love these types of games.


Thanks for the comment and for the kind words! The game is definitely still under development and I'm actively working on fixing up the colonist behavior system right now. There are a lot of things planned for the game and a big focus of this current version was to see if people were interested in what I had so far. Thanks again and keep an eye out for more updates. :)

(1 edit) (+1)

colonists keep getting soft locked, this can be from going idle,grab_5_structure _resin back and forward, i dont know how to recreate this but it is VERY common when i play. plz fix


There is an update in the works to fix the colonist behavior, but will probably take a bit. I'm working on a revamp of the colonist behavior system. Thanks for playing and for the comment!