
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.
Modeled estimate, not a reported figure. How we estimate →
Media

About
After a long journey to a distant planet, your colonists were supposed to wake up and begin building their new home. But something went wrong. Their stasis capsules malfunctioned, and when they finally awakened, the underground facility they were meant to inhabit has fallen into ruin.
Now, it's up to you to restore the base, manage resources, and expand across the planet’s surface—all while uncovering the secrets of this alien world and ensuring your colony thrives.
Mercury Fallen is a self-paced sci-fi colony management experience with a focus on exploration, expansion, and story-driven progression. Deconstruct the remnants of an abandoned facility, construct new rooms, conduct research, and grow your colony both underground and across the planet’s surface.

Tear down the ruins, scavenge resources, and transform the underground into a thriving colony. Design essential rooms, power systems, and infrastructure to support your growing population.
Uncover additional colonists, robots, and discoveries hidden in collapsed sections of the Mercury Facility.
Build and manage power and water resources to sustain your growing colony.


Unlock advanced technology, craft vital upgrades, and send colonists on daring expeditions to uncover alien artifacts, lost technology, and the secrets buried beneath the planet’s surface.
Research technology to unlock new rooms, crafting recipes, crops, and facility upgrades.
Discover alien plant life and new resource types to fuel your colony’s expansion.


Expand beyond the underground with surface expeditions and resource extraction.
Construct vehicles to explore alien terrain and extract rare materials.
Expand your power network above ground with multiple energy generation methods.
Send colonists to explore points of interest, uncovering new resources, hidden lore, and lost technology.


Every colonist has a story. Some will thrive, others will struggle—but they all rely on you. Keep them housed, happy, and well-fed while managing their quirks, relationships, and unexpected disasters. As your colony grows, expand your workforce with clones and automated robots to optimize daily operations.

A Colony That Feels Alive: Colonists have unique quirks, moods, and challenges. Keep them happy, or risk disaster as stress builds and problems arise. Manage colonists’ injuries, ailments, jobs, quirks, and needs to ensure long-term survival.
Build & Design Essential Spaces: Construct bedrooms, recreation areas, crafting stations, and more to meet the growing needs of your colony.
Customize your Colonists: Give your settlers unique names, outfits, and equipment, making each colonist truly your own.
Cultivate Alien and Terrestrial Crops: Grow a variety of terrestrial and alien crops to sustain your colony and fuel advanced production chains.
Expand Your Workforce: Grow clones and assemble robots to expand your facility population.
Brace for the Unexpected: React to and prepare for random events, including cave-ins and crop disease.
Procedurally generated worlds ensure a fresh experience each time, while Steam Workshop modding support lets you expand and customize your gameplay. Dynamic events introduce unexpected challenges and opportunities, making each colony feel unique.
Every colony tells a different story. Will yours flourish or fall? With procedurally generated worlds, dynamic challenges, and a blend of underground base-building, planetary exploration, and rich storytelling, Mercury Fallen is an ever-evolving adventure—whether you prefer a laid-back experience or a challenge that keeps you on your toes.
Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English
Engagement
Hours played at review time, across 40 reviews with recorded playtime.
Reviews
Themes across 40 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
positive critical· bar length = how often the theme comes up
Reviews
Lags with more and more beachballing before eventually stops working on Mac. Totally unplayable. Update: Crashes regularly. No real ending.
So im torn. Im recommending cause there is long term play value even though was released in 2023. SOme major needs are a start tutorial. The AI seems to work very well but some of the issues are the constant clicking just to mine one thing at a time and then it gets overhwhelimg to figure our whats needed for what because things happen totally out of order. But i still recommend. So some of the issues include running out of resources to make more items before you even get to the planet. This doesntmake sense considering the QUANTITY of items under the planet and the ability learn new things doesnt happen till after something else so the balance needs to be adjusted.
gave it just under 2hrs and so far progress seems very slow Awful graphics buggy interface and not much fun, got the game cheap from a Fanatical bundle no way would of paid full price for this.
I'm really enjoying Mercury Fallen. Excellent base building and exploration game. Easy enough to pick up but still challenging enough to keep you interested.
Одни баги, топливо антрацит не загружают в генератор, как не ставь приоритет. Генераторы пустые электричества нет и капец ничего не работает, раньше до обновлений все работало.
hidden gem
El juego esta interesante por desgracia deja mucho que desear empezando por los numerosos bugs... partidas guardadas que cuando vas a cargarlas te dice que están dañadas, la producción de agua y de electricidad que no siempre funciona como debe (solución temporal es guardar partida y cargarla), la IA es desastrosa tienes un pj con una sola tarea que puede cumplir y le ves cruzado de brazos, y muchos mas problemas Lo que es el juego no ofrece un desafío real de supervivencia, si pueden morir los pj pero no es muy probable salvo que tengas mas de 5 y cortes la electricidad del aparato que genera el O2 adicional para mas jugadores o que dejes de cultivar comida, aunque sea cruda, seguirán vivos. También podrían mejorarlo: - avisando cundo encuentran algo de interés al minar (robot, crio-capsula, caja suministros..) - añadiendo mas idiomas - localizador de recurso en le minimapa - mejorando la interfaz - listado de pjs mostrando todas sus habilidades y pudiendo elegir por cual ordenarlos - añade fauna, criaturas amistosas y hostiles así como medios de defenderse - mejor sistema de prioridades de construcción .... Aun así me ha gustado pero no para recomendar comprarlo, realmente se siente como un juego de acceso anticipado, inacabado, con muchas carencias y bugs. Si te lo regalan bien pero pagar por algo en este estado que te venden como acabado...
1. Woke everyone 2. Marked a few tiles for mining 3. Got stuck in some weird UI mode and couldn't do anything useful or get out 4. Uninstalled Maybe that's not giving it a fair chance, but I don't care to be frustrated by a game right now.
The game is just bad. No tutorial, no explanation of what you need to do, and how to do it. I tried 2 times to play it, but I could not progress. Do not spend money on this. I got this as a gift, so at least that is the positive part, that I haven't spent my own money on it.
Normally i would give a recommend because for a small games its well made. But there is one thing that is really frustrating: In game logic / missing explanations. Normally in such a game new machines, buildings, etc. are either explained how they supposed to work, or its made obvious / logical. Here, unfortunately, it's neither. You build certain things, but it's not explained how they actually work. Sometimes you have to look up the steam discussions to get ahead (as people have asked that before, but the devs didn't fix it/integrate better explanations). Sometimes you can build machines that you cannot use because for that you need to get to the surface and solve something else first (for example for the aquarium, you need 50 bio-research points to unlock a fish to breed. You cannot generate them, so you need to wait for something on the surface to happen (to get the bio-points to unlock the fish), despite the fact that you catch the fish constantly in the water trap and its eggs as well). Why there is such an artificial barrier is beyond me. If it would at least be explained how this is supposed to work, but its not. So as this is not explained at all, you are just dumbstruck and wonder if you have missed something. So progression is all over the place, most things are only vaguely explained or not at all, and often the next step is not obvious/logical, so you have no idea what you need to do to actually get a machine working, which means look up steam discussions. What irks me most here is that these things are really easy to fix, just add explanations to the machines or add more info to the info-overview. It's a small text to add, nothing more, this could be done with a hotfix. Unfortunately this game has very few players and request for support are not really answered mid term. Asked a question a few days ago, no answer. I found out by myself eventually. Until the progression logic is explained better, i cannot recommend this game.
Related
Related
Trends
Modeled estimate over time, reconstructed from Steam's monthly review histogram.
Momentum
Pace estimated from the game's recent review growth (our daily snapshots) at its own sales-per-review ratio — a momentum signal, not booked sales.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
Related
| VIDEOVERSE | $92.3K | 243 | 95% | $12.99 |
| Futa Nights: Bloody Sluts 💋 | $92.3K | 162 | 75% | $14.99 |
| Chaos Galaxy | $92.3K | 300 | 83% | $14.99 |
| 每日亲亲洛丽塔 | $92.3K | 400 | 76% | $8.99 |
| Warhammer 40,000: Space Marine - Master Crafted Edition | $92.3K | 390 | 53% | $39.99 |
| Creepy Tale 2 | $92.3K | 1.6K | 87% | $4.99 |