Mercury Fallen
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About Mercury Fallen
Mercury Fallen is a self-paced sci-fi colony management game about rebuilding an underground facility on a distant planet. After a malfunction in their stasis capsules, your colonists awaken to find the facility in ruins. You restore the base, manage resources and expand onto the planet’s surface while uncovering the alien world’s secrets and helping the colony thrive.
Rebuild the facility
Deconstruct the abandoned facility’s remains, scavenge resources and build rooms, power systems and infrastructure for your growing population. You manage power and water, and can uncover additional colonists, robots and discoveries in collapsed sections of the Mercury Facility. Research unlocks new rooms, crafting recipes, crops and facility upgrades; you can also craft vital upgrades and cultivate terrestrial and alien crops for food and production chains.
Explore the planet
Send colonists on expeditions to find alien artifacts, lost technology and secrets beneath the planet’s surface. You can construct vehicles to explore alien terrain and extract rare materials, and expand your above-ground power network using multiple energy generation methods. Expeditions to points of interest can reveal resources, hidden lore and lost technology, while discoveries of alien plant life and new resource types support further expansion.
Manage your colonists
Each colonist has a story, along with individual quirks, moods, relationships and challenges. You manage their housing, food, jobs, injuries, ailments, equipment and other needs; stress can build and lead to problems. You can customize settlers with names, outfits and equipment, and grow clones and assemble robots to expand the workforce and automate daily operations.
Colony systems
Design bedrooms, recreation areas, crafting stations and other spaces as the colony grows. Random events, including cave-ins and crop disease, bring challenges and opportunities. Procedurally generated worlds and dynamic events make each colony different, and Steam Workshop modding support lets you expand and customize the game.
Frequently asked questions
The best price for Mercury Fallen is $0.43 at Kinguin. That is 98% less than on Steam, where it costs $24.99. 15 shops have an offer that activates in your country.
Some are. This page only shows offers that activate in your country; offers for other regions, or with no stated region, are left out. To see the offers for another country, change your country at the top of the page.
Every key we list activates on Steam. Redeem the key there and Mercury Fallen stays in your library for good.
Yes, with a small risk. Publishers create keys to sell in other shops, which is why a key can cost less than in the official store, and once you activate it the game is yours to keep, just like a store purchase. On average 1–2% of keys fail, so check the shop's buyer protection before you buy: the official store does not refund keys bought elsewhere.
The minimum requirements for Mercury Fallen are: Windows 10, 4 GB RAM, 500 MB storage. It also runs on macOS. The recommended specs are in the System requirements section.
No. Mercury Fallen is a single-player game.
Mostly, yes. Valve rates Mercury Fallen as Playable on the Steam Deck: it runs, but may need some manual setup.
Buy Mercury Fallen 98% cheaper than on Steam.
Mercury Fallen is available for 98% less in shops such as Kinguin, Eneba, or K4G.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.











