Updates

Our third World Engine is live and free to play. FFVII: Reclaimed drops you into the world of Final Fantasy VII as someone entirely your own — from the slums beneath the plate to the lights of the Gold Saucer. The canon cast is all here, living their lives whether you cross them or not: Cloud, Tifa, Aerith, Barret, the Turks, and the worst Shinra has to offer. Build your character and write your story across a Planet that remembers what you do.

Inside: a full cast with evolving bonds, a living map of Midgar and the wider Planet, scene-aware lore, relationships you set before the first line is written, and difficulty from Assisted to Legendary. Bring your own API key and step into the story.

Every World Engine now opens into a builder. The Materia Story Studio lets you shape the whole world by hand — your own character, the premise you're playing inside, every place on the map, and the entire cast: the canon faces, the strangers who emerged as you played, and anyone you dream up yourself. Rewrite a bio, reshape a location, name a newcomer — it's all editable, and nothing is locked away.

And it isn't just who they are — it's how they feel about you. Set each character's starting bond and attraction before a single word is written: who trusts you, who's smitten, who wants you dead. Hate a tyrant you've never met, or open a story already devoted to someone — the world begins exactly where you say it does. Then save all of it to a single file.

That file is the part that changes everything. Hand it to another player and they drop straight into your world — your cast, your edits, your places, your relationships — and live the story from your point of view. “Here's my Midgar. You're the most hated person in it. Good luck.” Build it, bend it, and pass it on.

The people in your world stopped waiting on you. Step into the right place with the right person at your side, deep enough into what you've built together, and a moment comes looking for you — a friend pulls you aside, a guarded heart finally cracks open, someone takes a risk they'd never take with anyone else. Real, hand-written scenes, not random filler, surfacing only when the world is ready for them.

And the closer you grow to someone, the more they simply live alongside you — a devoted friend forever finding new ways to have your back, a lover never short on small, surprising ways to show it. These moments don't repeat and they don't run dry: the deeper the bond, the deeper the well, drawn from so many hand-written beats you could play for a year and never meet the same one twice.

It's a new layer Materia is rolling out across the worlds — a story that doesn't just answer you, it reaches back, and it keeps reaching.

Our second World Engine is live and free to play. Fallout: The Windy Wasteland drops you into the irradiated ruins of Chicago — Vaults, the Brotherhood of Steel, ghouls, raiders, and rolling rad-storms. Build your survivor and write your legend across a wasteland that remembers what you do.

Inside: a full cast with evolving bonds, a living map of the Windy Wasteland, the signature Pip-Boy interface, Rockabilly Redd's Radioactive Radio piping in atomic-age tunes, and difficulty from Assisted to Legendary. Bring your own API key and step out into the wind.

We built the eidetic memory we always talk about. Pocket Recall gives every engine near-total memory — the story keeps track of everyone you've met, everything you've done, and every thread you've pulled, and holds onto all of it as you play.

The payoff is twofold. Your engine stops drifting — no more contradictions, no more the-narrator-forgot-your-name, no more lost threads halfway through a long session. And it does it while saving you a fortune in tokens, carrying deep continuity for a fraction of what it would normally cost to keep that much in play. Long stories finally stay coherent and stay cheap.

The world no longer ends at the edge of the scene. Our Locations system gives every engine a living map — districts, landmarks, settlements, and hidden corners the story can move you through, each with its own character, dangers, and faces.

Travel means something. Geography means something. Wander far enough and the world keeps its shape — the same streets, the same people, the same history — so the place feels real no matter where you go.

Our first World Engine is live and free to play. RE: Rebirth is survival horror with an original twist: you're trapped in a never-ending, Umbrella-engineered simulation of the Raccoon City incident — a loop of outbreak, death, and rebirth you have to survive. Play an original survivor, or step into the boots of a familiar face.

It runs on everything Materia does best: lore-faithful canon, a living Raccoon City to move through, relationships that evolve with every choice, pocket recall that never loses the thread, and difficulty from Assisted to Inferno. Bring your own API key and survive the night.

Every character you meet keeps score. Our relationships system tracks a Bond and a Romance meter for each character, shifting in real time as the story earns it — warmth, trust, resentment, loyalty, love.

Act in line with what someone likes and the needle climbs; cross them and it slips. The narrator moves these bonds as the story deserves, and you can nudge them yourself. The cast doesn't just react to the scene — they react to you, and they carry it forward.

Becoming a Marrow Member is the best way through the door. Members get access to every Materia engine we build — World, Story, and Practical alike — the whole growing library, under one membership.

And when you want something of your own, members carry a standing 20% discount on any engine commission. One membership, the full collection, and a real cut on building your own world.

MarrowMyth is open. We build fully realized worlds and learning engines you can step inside — every one of them powered by Materia, our in-house creative technology. This is the home of F.C. Marrow's worlds, and the place to commission your own.

World Engines to roam, Story Engines to live, Practical Engines that teach, and bespoke Web Experiences — all under one roof. This page is our log: every release, every new system, every change we make, posted here as it happens. Welcome to the threshold. The morning's just begun.