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Embodied Lives
Energy, hydration, stamina, temperature, air, and integrity make survival a physical condition—not a collection of artificial need bars.
Explore bodies ›✦
A persistent world simulation
A World Experienced
from the Inside
Mundus is a living simulation where creatures inhabit physical bodies, perceive only what their senses reveal, and act through needs, personality, and memory.
Observe the server-run world from above, inspect its inhabitants, and follow the systems shaping their lives.
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Subjective Minds
Senses, disposition, drives, and remembered encounters shape what each creature notices and what it decides to do next.
See an encounter ›Live now
Persistent Consequences
Actions return to a shared, server-owned world where terrain, climate, plants, bodies, and memories survive as real state.
Explore the world ›✦ Live in the simulation
A world already taking shape
Mundus is under active development, but its foundation is real: a persistent world clock, streamed terrain and climate, living plants, embodied agents, subjective perception, decisions, actions, and awake memory.
Terrain & climate
Materials, elevation, moisture, temperature, wind, precipitation, daylight, and seasons form the changing physical substrate.
Vegetation
Discrete plants occupy climate and soil niches, grow, reproduce, decline, die, block movement, and persist across saves.
Embodied agents
Orcs and bunnies move through the world with real physiology, mortality, perception, drives, plans, and inspectable state.
Remembered encounters
Important things can be encoded, recalled, refreshed, corrected, or weakened when an agent discovers that its memory is stale.
Still ahead: complete seasonal ecology, broader species families, everyday material life, cooperation, economy, culture, factions, and institutions remain vision—not current-world claims.
✦ Inside the simulation
How life becomes story
The world offers possibilities; each creature experiences them differently, chooses what matters now, and leaves a change that everyone else must encounter for themselves.
The world describes itself
Ground, plants, objects, bodies, and signals carry simple readable properties—such as edible, wet, warm, or flammable.
Senses make it personal
A creature receives only what its senses can reach. Disposition, present feeling, and experience turn those facts into a private point of view.
Needs shape the choice
Hunger, safety, curiosity, and other drives weigh the actions the moment affords. Urgent needs can silence less important plans.
Action answers the world
The chosen action crosses back into shared reality: move, eat, flee, signal, or strike. Bodies and surroundings carry the result.
Consequences become memory
Surprising and important encounters are carried forward. Recall changes the next interpretation, so a familiar place may feel different.
No direct mind-reading. No prewritten scene. Creatures meet through observable acts and signals, and the next story begins from the world they changed.
Explore the living systems ›✦ Subjective perception
Same world. Different truth.
A fox crossing a meadow is one physical event. What that event means belongs to the creature experiencing it.
The remembered danger
B
“That shape chased me before.”
A remembered threat raises arousal and pulls attention toward danger. Clover can fall out of awareness while escape actions become urgent.
memory+safety→flee
The unfamiliar movement
B
“Something moved by the trees.”
Without the same memory—and with a bolder disposition—the identical signal may hold attention without immediately becoming overwhelming fear.
novelty+curiosity→observe
Danger is not painted onto the fox as a universal verdict. Each mind constructs a reading from the world, its body, and what it has learned.
✦ Three foundations
Life emerges from shared rules
The body creates the need
Hunger is not a meter attached to a creature. It is what a metabolizing body experiences as its energy reserve approaches danger.
reserve falls→hunger rises→seek food
Properties create possibilities
A berry affords eating because it is edible. A branch can become material or fuel because of what it is—not because every object carries a bespoke script.
Memory remakes the moment
Memory is not a perfect recording. Important differences are carried forward, weakened or corrected, and interpreted again through the creature’s present state.
surprise→remember→reinterpret
✦ A window into Mundus
See the simulation from above
The browser is an observer and inspection tool—not the source of truth. Fly across the streamed world, inspect creatures and terrain, and watch the server settle every change into its history.
✦ The journey ahead
Roadmap
Building MUNDUS in chapters. Each milestone expands the world, deepens systems, and unlocks new possibilities.