Hey everyone. I’ve been getting questions about what Rimefall actually is, so I figured it’s time to put something proper out there. This is the first in a series of devlogs where I’ll be walking through the world, the mechanics, and the ideas behind the game. Let’s start with the big picture.
So What Is Rimefall?
Rimefall is a grand strategy game about humanity’s second chance on an alien world — and how fast things fall apart when you rip away the global infrastructure that made modern civilization possible.
You lead one of 70+ nations that fled a dying Earth aboard ark ships. After decades drifting through interstellar space, your people have landed on an alien planet called Umbra. You brought engineers, soldiers, scholars, seeds, livestock, steel, and the collective knowledge of a species that built particle accelerators and mapped the human genome.
It’s going to matter a lot less than you think.
Why Earth Dies
No nuclear war. No asteroid. No AI uprising.
In 2051, a mutated strain of oceanic phytoplankton — Strain-X — starts devouring atmospheric CO2 at an unprecedented rate. Sounds like good news, right? It isn’t.
Strain-X doesn’t just fix carbon. It catalyzes nitrogen and oxygen into stable compounds that precipitate out of the air. The atmosphere itself is thinning. Temperatures plummet. By 2055, the projections are in: Earth will be uninhabitable within 25 years. There is no cure. There is no reversal. The biosphere is quietly eating itself from the inside.
The UN passes the Exodus Resolution. Every major economy pivots to a total war footing — not against an enemy, but against a deadline. The goal is simple: build ships, get people off the planet. These aren’t sleek sci-fi cruisers. They’re ugly, industrial things — modular, bolted together in orbit, looking more like flying oil rigs than anything from the movies. When your species has 20 years left, aesthetics are the first thing you cut.
The Exodus
Between 2070 and 2080, around 700,000-900,000 humans board ark ships and launch toward Umbra — an exoplanet confirmed back in 2042 to have a breathable atmosphere, liquid water, and what looked like biosignatures. It’s roughly 12 light-years away.
Every nation packed the essentials — grain, basic livestock cultures, medical supplies, industrial materials. But each one also poured extra resources into preserving what they knew best. Germany made damn sure its brewer’s yeast and rye strains had the best cryo-storage money could buy. France prioritized its wine grape rootstock and lavender cultures. Japan safeguarded its finest rice cultivars and soy. Argentina invested heavily in preserving its cattle embryos. Everyone carried the basics, but every civilization had something it refused to lose.
They also brought people. Engineers. Doctors. Farmers. Soldiers. And the families who won the lottery. It was framed as random selection. It wasn’t — quietly weighted toward health, genetics, and useful skills. Billions watched as green confirmation screens lit up for the chosen, and red screens sealed the fate of everyone else. Those left behind didn’t just lie down and die — sealed bunker networks, underground cities, high-altitude refuges in the Himalayas and Andes. Humanity is stubborn. But what became of them, no one on the arks would ever know.
The journey takes roughly 50-60 years. Some passengers survive in cryogenic suspension. Some don’t. Children are born in transit who have never seen a sky of any color.
Around 2130, the first arks enter orbit above Umbra.
A New World
Umbra is not Earth.
The sky is mostly grey, sometimes even white. A permanent haze of high-altitude ice crystals scatters sunlight into a diffuse, shadowless glow. The sun shows up as a faint silver disc that sometimes disappears entirely behind the haze — they call it “Veiled Sun,” where the whole sky becomes a flat, featureless white and you lose all sense of direction and depth.
The plant life is jet black. Dark charcoal leaves, obsidian-textured bark, matte anthracite surfaces — all of it evolved to absorb every photon it can get from the diffuse light. Streaks of inorganic orange and crimson mineral deposits cut through the darkness like hazard stripes. The forests don’t look like forests. They look like someone sculpted them from volcanic glass.
There are creatures. Armored herbivores plated in rough black basalt that can curl into a sealed sphere when threatened. Translucent, gas-filled things that drift through the upper atmosphere, nearly invisible against the white sky. Segmented crawlers that probe decaying flora with retractable orange-tipped proboscises.
And there are things that hunt at night. I won’t get into all of them here, but I’ll mention the Nyctoptic Lurker — an apex predator covered in a biological material so dark it absorbs nearly all visible light. During the day it’s a patch of shadow pressed against the base of a tree. At night, all you see are three luminous eyes, electric blue, floating silently through the dark. No footsteps. No sound. Just light, drifting toward you.
Umbra is breathable. It has water. It can support life. But the planet is remarkably poor in the kinds of resources humans actually need. The raw materials your arks carried from Earth aren’t just a head start. They might be the only significant stockpile of steel, copper, and industrial materials on the entire planet.
Umbra will keep you alive but It will not make things easy.
The Complexity Collapse
This is where Rimefall becomes a different kind of game.
Your colonists brought 2070s technology. Laptops, precision instruments, medical scanners, communication systems — the accumulated output of a ten-billion-person global economy packed into cargo holds.
The moment the arks unseal in Umbra’s atmosphere, all of it dies.
Umbra’s air is saturated with ionized micro-particulates — a permanent atmospheric phenomenon that creates constant electrical micro-discharges across any exposed semiconductor. It’s not gradual corrosion. It’s almost instant. Within a few hours every microchip, every processor, every piece of electronics with a CPU short-circuits – screens go dark – Servers fry – Communication arrays drop to static. In the span of hours, your civilization loses every piece of digital technology it brought from Earth.
Mechanical equipment survives. Analog instruments survive. Books survive. But the computers, the medical scanners, the precision CNC machines with their digital controllers — gone. And you can’t rebuild them. Not because you don’t know how, but because you don’t have the supply chain. You don’t have the factories that make the factories that make the chips. You never will.
A 21st-century engineer with a PhD in materials science is now holding the tools of a medieval blacksmith, with the knowledge of a civilization she can never rebuild alone.
This is the Complexity Collapse. Your nation starts with finite stockpiles of advanced materials — steel stripped from the ark hulls, copper wiring, aluminum, plastics, cloth, rope. Every year, these reserves shrink. Steel drops by 170 tons annually just from maintenance. Paper runs out within 6 years unless you build a mill. Cloth is critical and dwindling. Plastics are irreplaceable — once they’re gone, they’re gone forever.
The clock is ticking from the moment you land.
The Biological Lottery
Every nation brought seeds, livestock cultures, and biological samples from Earth. But Umbra’s biochemistry is alien. Not everything adapts.
Each biological asset has a probability of surviving on Umbra. German hops: 8%. French wine grapes: 3%. Japanese rice: 20%. Argentine cattle cultures: maybe 15%. At the start of every new game, the dice roll. Your wheat might take root. Your potatoes might wither and die. The nation across the river might end up being the only people on the planet who still have soybeans — and they’ll know exactly what that’s worth.
What grows and what doesn’t shapes everything. Your economy, your trade leverage, your food security, your culture. A nation that loses its grain but keeps its cattle has leverage over the entire continent. A nation that rolls badly on adaptation is in real trouble.
You won’t starve overnight — Umbra isn’t completely barren. The wildlife is edible, the alien fish are nutritious enough, and there are a handful of native plants that turn out to be useful to humans if you’re lucky enough to have them growing near your settlement. But “edible” and “thriving agricultural base” are very different things. Surviving on hunted alien meat and foraged roots is not the same as feeding a growing nation.
There’s More to Umbra
I’m keeping things at a high level here on purpose. There is a lot more going on with this planet and with the game’s systems than what I’ve laid out in this first devlog — some of it will be covered in upcoming posts about mechanics and features, and some of it… well, some of it you’ll discover when you play.
I’ll say this much: Umbra has its own history. Its own inhabitants. Its own reasons for being the way it is. The black flora and the white sky aren’t just aesthetics — they’re clues. But that’s a story for another time.
What Kind of Game Is This, Really?
If I had to boil it down: Rimefall is what happens when you blend Europa Universalis 5 and Victoria 3, crash it into Frostpunk, with a combat system similar to heroes 3 and set the whole thing on an alien planet where your technology is dying and your wheat might not grow.
You manage economy, population, diplomacy, military, and exploration. You build production chains from raw resources. You pass laws that define your society — if your people or your military back you enough to let you. You deal with food shortages, corruption, religious tensions, war, cultural drift, and the slow erosion of everything your people once knew about Earth.
But underneath all the systems is a question I haven’t seen another grand strategy game ask:
What happens to humanity when the supply chain dies?
When your engineers know how combustion engines work but can’t find rubber for gaskets. When your doctors understand antibiotics but have no way to synthesize them. When your scholars describe the internet to their grandchildren and those grandchildren think it’s a myth.
Rimefall is built in Godot. Your feedback genuinely shapes what this becomes.
and dont forget to wishlist the game on steam:
Coming Up
– Devlog #2: The Survival Economy on 22.03.2026 — Ark stockpiles, production chains, and the ticking clock of finite resources
– Devlog #3: Nations & People on 29.03.2026 — 70+ real nations, corporations and tribes rebuilding on alien soil, population, professions, and demographics
– Devlog #4: The Living World (TBA) — Climate, exploration, wildlife, and what happens when the planet notices you
If any of this sounds like your kind of thing — wishlist Rimefall and stick around. We’re just getting started.