Steam app 704510 · updated 13 Sep 2026, 00:09 UTC
A sci-fi colony management sim with a focus on exploration, expansion, and survival. Rebuild your underground facility, manage colonists and robots, and uncover the mysteries of an alien world light-years from Earth. Dig deep, expand across the surface, and shape your new home.
193 hourly samples, with the daily peak drawn over them. Weekends are shaded.
109 months, September 2017 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
24 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
27 days as the curve, each the highest figure that day. Behind it, 128 hourly samples from 14 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
8 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
Mercury Fallen was released on 22 Aug, 2023.
| Language | Full audio |
|---|---|
| English |
A blank audio cell means full audio was not marked in the returned language list.
18 achievements in total.
50 developer announcements, May 2023 to Jun 2026 · times in UTC
Mercury Fallen is 60% off in the Steam Summer Sale, June 25 to July 9. Grab your copy and check out other great indie games on sale during the Summer Sale to add to your collection. https://store.steampowered.com/app/704510/
alyssa.dicaterinoHowdy Folks!I hope you’re all doing great.I wanted to take a quick second to send a huge thank you your way. The support and feedback you’ve given Mercury Fallen has been incredible—honestly, as a solo dev, seeing people actually enjoy the…
Nitrous ButterflyHowdy Folks!Happy Holidays and a Merry Christmas to you all! It has been an incredible year, and I want to extend a warm welcome to everyone who joined the Mercury Fallen community recently. Running this project as a solo developer is a…
Nitrous ButterflyHowdy Folks!As you may, or may not know, I'm currently developing PACK :: Post Apocalyptic Cleaning Kit. I’ve had a few people ask me why I’m working on such a different kind of game so I thought I would provide an answer for anyone…
Nitrous Butterfly- Rolled back from recent hot fix to address issue with crashing
Patch notesHowdy Folks!As you may, or may not, know, Mercury Fallen is made using the Unity game engine and sadly a security vulnerability was recently reported. Thankfully there is no indication that any player data or information has been…
Patch notesHowdy Folks! As I've mentioned before, I've been developing a new game called P.A.C.K. :: Post Apocalyptic Cleaning Kit. It's currently available to wishlist and I'm super excited to announce that the game has a brand new demo! Wishlist…
Nitrous ButterflyHowdy Folks! I'm super excited to announce that Mercury Fallen is partnering with indie.io! It feels like only yesterday that 1.0 was released and it was a long journey to get there. I'm always amazed, and honored, to see so many of you…
Nitrous ButterflyHowdy Folks! I hope everyone is doing well and staying safe out there. I'm super excited to announce that my next project P.A.C.K. :: Post Apocalyptic Cleaning Kit is now available to wishlist on Steam! There is also a brand new shiny…
Nitrous ButterflyHowdy Everyone! It's been an amazing year for Mercury Fallen and I want to thank everyone for the amazing support and feedback. I want to wish everyone an amazing Holiday and hoping you all a wonderful new year!…
Nitrous ButterflyHowdy Folks! A huge thank you to all of you for your amazing support. Mercury Fallen has been a great adventure and, as mentioned before, there isn't any additional content for the game currently planned. So that begs the question: What am…
Nitrous ButterflyHowdy Folks! A huge thank you for all of the feedback and reports on the experimental branch. Update 1.19 fixes up several issues, including a nasty crash bug that was introduced in 1.18. Additions A couple of minor additions are also…
Nitrous ButterflyHowdy Folks! Due to additional reports of users experiencing game crashes, I've decided to rollback to version 1.17 while I continue to investigate the issue. If you are experiencing this issue and want to help, please check out the…
Nitrous ButterflyHowdy Folks! Patch Update 1.19 is now on the experimental branch and aims to resolve game crashes that can occur during auto saves and extended play periods. If you're experiencing poor performance or the game crashing after playing for a…
Nitrous ButterflyHowdy Folks! Patch Update 1.18 is now available. This update fixes various issues including a game breaking bug where you could deconstruct something critical to progressing in the main mission. Thank you for the great feedback on the…
Patch notesHowdy Folks! I recently released Patch 1.18 and, unfortunately, had to roll back to update 1.17 due to various reported issues. After making some extensive code changes I’m re-releasing Patch Update 1.18 on to the experimental branch for…
Nitrous ButterflyHowdy Folks! This is a tiny patch update to fix patch update 1.18. Please let me know if you encounter further issues related to being unable to return the main menu or colonists no longer performing actions after 30+ minutes of play time.…
Patch notesHowdy Folks! Thanks for all the great feedback and support! Patch Update 1.18 addresses a few reported issues. Be sure to check out the release notes below for a list of fixes. As I’ve mentioned previously, I have been working on a new…
Patch notesHowdy Folks! Patch 1.17 is a small patch to address some reported issues. Keep all that feedback coming! It’s great to hear what you like and what you don’t. Wiki I’ve been working to get a wiki up and running for some time, but I’m often…
Patch notesHowdy Folks! Happy New Year! It's a new year and a new patch update for Mercury Fallen. This is another small update to address some feedback and report. Thanks everyone for the amazing support! Support & Follow Mercury Fallen On Twitter |…
Patch notesHowdy Folks! It’s been an amazing year for me and Mercury Fallen. After six years of early access development, the 1.0 version of Mercury Fallen was released in August. It has been amazing hear all of your feedback and I’m glad so many of…
Nitrous ButterflyRelease Notes Fixed: Some confirmation windows not appearing or not accessible
Patch notesHowdy Folks! The previous 1.14 release was rolled back to 1.13 while I resolved an issue with the game not launching. Whoops. Should be good now... let me know. :) Release Notes Fixed: Game facts not properly resetting in some instances.…
Patch notesRelease Notes Fixed: Game facts not properly resetting in some instances. This caused various issues with some mission/story progression Fixed: Pause outline showing on top of modal/loading screens
Patch notesRelease Notes Fixed: Launch platform not saving/loading construction progress Fixed: “Launch Communication Satellite” mission not registering rocket construction/launch in some instances
Patch notesPatch Update 1.12 Fixed: Terraformer regulator surface structure can be deconstructed Fixed: Deep driller bots mining tiles that are not accessible due to an object/structure being on top of the selected tile. This could occur due to a cave…
Patch notesRelease Notes Fixed: Vehicle assembler not refunding materials when cancelling construction Fixed: Robot assembler refunding materials after robot is finished construction
Patch notesRelease Notes Vehicle bay and robot assembler now show engineer job role icon next to queued vehicle/robot to indicate that an engineer is required to deliver materials for construction Fixed: Robot assembler not returning build materials…
Patch notesHowdy Folks! Hope everyone is doing well and having a great time out there in the wilds of the world. I’m happy to announce a new patch for Mercury Fallen that fixes up some issues and adds few helpful quality of life improvements. Robot…
Nitrous ButterflyHowdy Folks! A huge thanks to all of you for all of the amazing feedback since Mercury Fallen launched. As a solo developer it's great to see so many people enjoying my game. Mercury Fallen is now 15% this week! It's a great time to grab a…
Nitrous ButterflyHowdy Folks! This is a small update to add mod support for custom poster/sign materials. This includes a tiny under the hood change to the main game as well as some additions to the downloadable mod tools. A new guide has also been added…
Patch notesHowdy Folks! Thanks for all the great feedback and support! It's amazing to see so many people enjoying my game. Here is a patch update to address a few reported and discovered issues. Support & Follow Mercury Fallen Development On Twitter…
Patch notesRelease Notes Fixed: Colonist constantly picking up and putting down repair kits when attempting to repair an object.
Patch notesRelease Notes Added space between number and water unit on main hud and water info section Updated description of some research projects and objects for better clarity Fixed: Unable to trade at trade platform after loading a save game in…
Patch notesHowdy Folks! Here is another small patch update to address a few reported issues. Thanks for all the amazing feedback and support! Release Notes Fixed: Able to manually enter higher value than a trade item quantity field should allow Fixed…
Patch notesHowdy Folks! Here is another small patch to address some bugs and add some quality of life changes. Trade Window {STEAM_CLAN_IMAGE}/30760687/0a1d5f52e11f5b794549a712adaaf45c18f64f96.png The trade window now marks favored trade items in both…
Patch notesHowdy Folks! It's been a whole week since the release of 1.0 and I just want to say thank you for all the amazing feedback so far. It's awesome seeing people enjoying the game that I created. It's also been great that you've been letting me…
Patch notesHowdy Folks! The Mercury Fallen launch has been great! Thank you to everyone who showed up at the release live stream event. The feedback has been amazing and it’s great to see so many people enjoying my game. I just wanted to push out a…
Patch notesHowdy Folks! I’m super excited to announce that Mercury Fallen is no longer in Early Access and the 1.0 version is now available. It’s been a long road as a solo developer, but I couldn’t have done it without the amazing feedback and…
Nitrous ButterflyHowdy Folks! The 1.0 release of Mercury Fallen is hitting Steam on August 22nd at 12pm EST. I'll be in chat with GameTimeUK streaming right here on Steam starting at 12:30pm EST on August 22nd! Come and watch as GameTimeUK plays the 1.0…
Nitrous ButterflyHowdy Folks! There is less than a week to go until Mercury Fallen is released out of Early Access. The 1.0 release of Mercury Fallen is dropping next Tuesday August 22nd. There will be a minor price increase when the game is released as…
Nitrous ButterflyHowdy Folks! Time is ticking by fast and there are just three weeks until the 1.0 release of Mercury Fallen. It’s been a wild ride getting to this point and I couldn’t have made it here without the amazing support and feedback from all of…
Nitrous ButterflyHowdy Folks! It’s testing time again and this time it’s for the Planetary Repairs update. There is still more content in development for this update, but it’s ready for folks to let me know what’s wrong, what’s good and what’s bad. The…
Nitrous ButterflyHowdy Folks! Hope everyone is sitting down because I have some big news. I mean you can stand if you want to, that’s cool. Anyway, come in a bit closer, the big news is that Mercury Fallen will be releasing on August 22, 2023! That’s right…
Nitrous ButterflyHowdy Folks! A huge thanks for all the great feedback and support. Since the last major content update, I’ve been pushing out a bunch of smaller updates that have added some great new features such a crop/mining management, dragging…
Nitrous ButterflyHowdy Folks! Just a small patch update to address a couple of reported issues. Enjoy! :) Fixed: Expedition data is not removed properly when an expedition party returns to the facility. This caused further expeditions to not function…
Patch notesHowdy Folks! I hope everyone is doing well out wherever you may be. I’ve been busy working on another small-ish update to address a few reported issues and improve upon some existing content. Vehicles…
Nitrous ButterflyRelease Notes Reduced some model textures that were larger than intended to improve memory usage. Fixed: Door open/close audio spawning new audio component each time it opens and closes. This should result in some performance improvement…
Patch notesHowdy Folks! This is a tiny little hot fix to address a bug introduced in the latest update. Thanks for the feedback and reports. :) Release Notes Fixed: Debugging data causing log file to grow in file size very quickly. This caused a slow…
Patch notesHowdy Folks! Hope everyone is doing well. I’m very excited to announce minor update 36.6 which includes an amazing new feature, a few changes and some fixes. Resource Management…
Nitrous ButterflyWhat Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Mercury Fallen | MercuryFallen.exe | windows | ||
| Mercury Fallen | MercuryFallen.app | macos |
The folders Steam Cloud syncs. The root is a token Steam uses for a location on your own machine, not a path this page can know.
| Root | Folder | Files |
|---|---|---|
WinMyDocuments | Mercury Fallen/ | *.* and below |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG