A downloadable game for Windows and macOS

Buy Now$14.99 USD or more

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. Expand the colony, build structures and recover technologies to ensure the survival of your new found home away from home.


  • Manage a group of colonists needs and ensure their survival
  • Dig out the surrounding area to gather resources and expand the Mercury Facility
  • Build rooms, structures, machines and decorations to keep your colony happy and healthy
  • Recover corrupted data to build new structures and recipes
  • Discover trapped colonists and robots to expand your population
  • Grow crops for food and other refined materials
  • Grow clones

Mercury Fallen is being developed by Tim Pelham which is the entire team of Nitrous Butterfly. There is a lot of exciting things to come for Mercury Fallen and a huge thank you to those that join the adventure.

Early Access Alpha

Purchase Mercury Fallen today and join the adventure as the game continues development. There are a lot of great things planned and with support and feedback from great players like you I can ensure Mercury Fallen is the best it can be. Get a copy of alpha and get all future updates including the final release.

  • Get access to all future updates

If you have purchased a copy of Mercury Fallen please click here for information on how to claim your Steam Key.

Alpha Demo

If you want a free sample be sure to download the alpha demo now available for Windows and Mac. There are various restrictions in the demo such as no save/load game and limited play time.  There are a lot of additional features in the paid alpha version. If you like the game and want to help support a solo developer then pickup a copy of the Mercury Fallen alpha today. 

Website | FAQ | 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

More information

Published Apr 07, 2017
StatusIn development
PlatformsWindows, macOS
AuthorNitrous Butterfly
Tags3D, colony, Crafting, sci-fi, simulation, Survival
Average sessionA few hours
InputsKeyboard, Mouse
LinksHomepage, Twitter, Community, Community


Buy Now$14.99 USD or more

In order to download this game you must purchase it at or above the minimum price of $14.99 USD. Your purchase comes with a Steam key. You will get access to the following files:

Mercury Fallen Alpha - Mac Version 0.11 74 MB
Mercury Fallen Alpha - Win Version 0.11 57 MB

Download demo

Mercury Fallen Alpha Demo Win 34 MB
Mercury Fallen Alpha Demo Mac 49 MB

Development log

View all posts