A dark city simulation with procedural generation and emergent storytelling. Observe, befriend, manipulate, and betray hundreds of fully simulated citizens as they live, work, scheme, and die around you. Shape bloodlines across generations and uncover the sinister forces moving beneath the city.

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Planned Release Date: October 2026

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About This Game

A dark medieval city simulation where every citizen lives a life of their own. Walk the streets of a procedurally generated London where something older than the church watches from the shadows. Manipulate, befriend, betray. Every soul has a story. Yours decides how it ends.

London, 1501 The cathedrals are tall, the kings are restless, and something beneath the cobblestones is stirring.

You arrive in a living medieval city on the cusp of a new century — a city that does not know you, does not need you, and will not wait for you. Somewhere in its alleys and almshouses, older powers are moving. You may never see their faces. You will feel their fingerprints on everything.

Umbral Coterie is a dark, character-driven city simulation built on procedural generation and emergent storytelling. Every citizen — from the drunken thatcher to the cardinal's bastard son — has a name, a family, a faith, four humors balanced uneasily in their blood, and a daily routine that unfolds whether you watch or not. Befriend them. Bleed them. Bury them. The city remembers.

There are no scripted quests. There is only the city, the shadow it casts, and the consequences of standing in it.

Key Features

  • A Living Medieval City: Hundreds of citizens with full personalities, occupations, relationships, faiths, and schedules. They wake, work, drink, pray, gossip, fall in love, fall ill, and die — with or without your interference.

  • Emergent Storytelling: No two playthroughs tell the same tale. Every marriage, murder, plague, and betrayal is generated from the simulation itself. The chronicle of your city is written as you play.

  • Procedural Generation: Streets, families, bloodlines, and histories are forged anew each game. A different London. A different rot. A different ruin.

  • Something in the Dark: The city is not alone. Sinister forces older than the throne move beneath the surface, and the deeper you look, the more they look back. Discover them on your own terms — or stumble into them at the worst possible moment.

  • The Four Humors: Personality is not a stat sheet. Each soul is shaped by sanguine, choleric, melancholic, and phlegmatic humors, inherited from parents and shifted by trauma. Compatibility, ambition, and madness all emerge from the blood.

  • Medieval Authenticity, Gothic Imagination: Period-accurate names, occupations, social classes, and faith, twisted by something rotten beneath the surface. Tudor London as it was — and as it never was.

  • Consequence That Lingers: Citizens remember. Families remember. The town's chronicle remembers. A sin committed in winter may not be repaid until a generation has died.

  • Watch the City Breathe A fully 3D orthographic world you can orbit, zoom, and pan. Follow a single soul through their day, or pull back and watch the whole city move at once.

The Long Game

This is not a game about winning. It is a game about what you leave behind when the candles are finally snuffed out. A bloodline. A legend. A city in ashes. A name whispered in the dark. A single grave no one will ever find.

Pull the strings. Or cut them.

Something is waiting.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Much of the code base is written with the assistance of AI, however only under the close control of the lead developers as control of the design is critical in making a good game. Bugs found in the game should be blamed on me, not AI.

All of the art is made by hand. In some cases, AI is used to create templates or patterns that are completely redone by hand. More common thinks like resizing or pixelating an image is done via conventional tools for pixel art development.

Mature Content Description

The developers describe the content like this:

There is no nudity or depictions of sexual acts at this time. I'm keeping this open as I develop and will update if this changes.

Because of the generally violent and erotic nature of vampire ethos, I have decided to mark this game as Mature.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 64-bit (version 20H2 or later)
    • Processor: Intel Core i5-7500 / AMD Ryzen 3 2300X or equivalent
    • Memory: 4 GB RAM
    • Graphics: ulkan 1.0 compatible GPU — NVIDIA GTX 950 / AMD RX 460 / Intel UHD 630 (1 GB VRAM; integrated graphics supported)
    • DirectX: Version 12
    • Storage: 600 MB available space
    • Additional Notes: At minimum spec, keep city population below 60 citizens for smooth performance. CPU single-core speed is the dominant factor — faster cores matter more than more cores. A dedicated GPU is not required as long as your integrated graphics supports Vulkan 1.0.
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 / Windows 11 64-bit
    • Processor: Intel Core i5-10600K / AMD Ryzen 5 3600X or equivalent
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GTX 1060 / AMD RX 580 or better
    • DirectX: Version 12
    • Storage: 1 GB available space
    • Additional Notes: Recommended spec supports a full medieval city with an active population of 200+ citizens, active relationship simulation, GOAP-driven AI, and full historical event tracking running simultaneously. No ray tracing, HDR, or shader-heavy effects — GPU quality above the minimum threshold has no measurable impact on performance.
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