Sci-Fi TTRPG Economics: When 3D Printing Rewrites the Rules

A few years ago I was traveling in the States and we stayed in an Airbnb owned by a retired pilot. Sixty-something, friendly, had a workshop in his garage. At some point he casually mentioned he prints most of his plane parts himself. On a machine roughly the size of a oven.

I stood there for a second trying to process that. He showed me his plane and his 3D printer. This guy is flying planes held together by parts made in his garage, and it’s completely legal, safe, and honestly kind of impressive. That’s when I realized I was already living in the future and just hadn’t noticed.

Boeing puts 60,000 printed parts in each aircraft. Relativity Space prints 85 to 95% of its rockets. ICON isn’t building houses anymore, they’re printing entire neighborhoods. NASA is experimenting with lunar regolith as a feedstock for construction on the Moon. None of this is speculation. This is 2025.

Sol Fracta‘s sci-fi TTRPG economics started with a question: what does production actually look like when fabrication is decentralized down to the individual level?

So when I started building the colonial economy of unknown worlds for Sol Fracta, the question wasn’t “will 3D printing matter in the year 3000?” The question was: what’s left that isn’t printed?

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The Death of the Traditional Factory

The answer we landed on is: almost nothing.

By the year 3000, the concept of a traditional manufacturing facility, a building where raw materials come in one end and finished goods come out the other through assembly lines and human labor, has been replaced entirely by what Sol Fracta calls Forges. Specialized additive manufacturing installations, each optimized for a specific material class or output domain.

Six Forges in total:

Polymer handles plastics, composites, flexible materials. The workhorse of daily colonial life, everything from habitat panels to basic tools.

Metallurgical works metals and alloys. Structural components, weapons housings, mechanical parts that need to handle stress and heat.

Structural produces the large-scale architectural elements. Hab modules, load-bearing frameworks, the bones of a colony.

Electronic fabricates the chips, circuits, sensors, and logic components. It’s the brain factory. Merco Prime controls it on Calvaire, which is not a neutral fact.

Biomedical handles implants, pharmaceutical printing, prosthetics, everything the body might need that a human hand can’t reliably make at scale.

Armament produces weapons. Every faction wants a piece of this one.

What doesn’t disappear? Three things. The Mine, because you still need raw material input regardless of how sophisticated your fabrication is. The Power Plant, because Forges are energy-hungry and everything downstream of them is too. And the agriculture, because nutritional synthesizers can supplement food production but haven’t replaced the psychological, biological and social function of actual agriculture. People on colonies still eat food they can point to.

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The Robot Pipeline and Why It’s the Real Power Play

Here’s where it gets mechanically interesting for the game.

Building an automaton in Sol Fracta isn’t one step, it’s three. The chassis comes from the Structural Forge. The cognitive and sensor components come from the Electronic Forge. Then both are integrated at an Assembly Workshop where the protocol gets installed and calibrated.

Three buildings. Three potential points of control. Three different factions who might each own a piece of that pipeline.

If you control all three, you decide who gets robots. Not in a theoretical sense. In a very immediate, very political sense. Want to expand your automated labor force? You need to negotiate with whoever owns the Forge that makes the brains. Want to field an army of security automata? Better have a relationship with whoever controls assembly. The robot economy is the colony economy, and access to it runs through those three chokepoints.

Merco Prime controlling the Electronic Forge on Calvaire isn’t a lore detail we added for flavor. It’s a structural design decision about where power actually lives.

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Blueprints Are Physics, Not Bureaucracy

The thing I’m most satisfied with in this system is what we ended up calling the Strategic Resource, which is the fifth and most contested resource category in Sol Fracta.

Here’s the problem we were solving. When colonists arrive on unknown worlds from Earth, or Sol, they bring blueprints. Centuries of accumulated human engineering knowledge, compressed and archived. But other worlds are not Earth. The gravity can be different. Atmospheric pressure can be different. Temperature ranges are different. The mineral composition of locally available materials is completely different.

A blueprint designed for Earth conditions will produce something that works on Earth. On other worlds, that same blueprint might produce something that fails under load, corrodes in three months, or simply can’t be fabricated from available feedstock.

The Strategic Resource represents the work of adaptation. The engineering labor of taking a blueprint designed for one planet and reengineering it to function on another. It’s not a tax. It’s not an arbitrary game cost to make resource management feel weighted. It’s physics. Colonial physics, specifically.

This felt important to us because it grounds what could be an abstract economic mechanic in something real. The reason blueprints are so strategically significant on other worlds is the same reason that the first Mars colonists will spend enormous effort figuring out what Earth manufacturing processes actually transfer and which ones need to be reinvented from scratch. Knowledge doesn’t port automatically. Adaptation is labor.

A faction that controls the adaptation process, that does the engineering work to make Earth blueprints other worlds-compatible, holds something that can’t be easily replicated. They’re not hoarding schematics. They’re holding the keys to what local industry can actually produce.

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What This Means at the Table

When your players arrive on another world at game start, the Forge infrastructure is nascent. Basic polymers, basic metals. The quality ceiling is low. You can produce functional gear, but functional isn’t impressive.

As the colony develops, the Forge ecosystem expands, quality tiers unlock, and the political map of who controls what becomes increasingly complex. The Electronic Forge that Merco Prime runs is fine when the colony is small and everyone needs each other. It becomes a pressure point the moment Automatisation reaches a level where robot production is the deciding factor in factional power.

The Forge system gives players a physical map of economic power. You can see where the chokepoints are. You can look at the colony sheet and understand, immediately, which faction controls which productive capacity and what that means for anyone who needs something manufactured.

That clarity was the design goal. Not simulation. Clarity with enough realistic grounding that the fiction holds.

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The retired pilot in the Airbnb probably didn’t think he was showing me the future of colonial economics. He was just printing parts for his plane.

But that moment, of watching something get produced that used to require a factory, a supply chain, and a team of specialists, now reduced to a machine and a file, stuck with me. It’s not that manufacturing disappeared. It’s that it became information. And information, as any good SF writer will tell you, is always the real resource.

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How do you ground sci-fi TTRPG economics in something real, and have you found a piece of present-day technology that changed how you thought about your fictional world?

What’s the first building you’d fight for control of on your new world and why?