HAMON
A swordsmith's forge in the foothills: a thatched kajiba under a cedar slope, the village road leading up past a few stalls, terraced rice paddies and a stone irrigation channel, one cherry tree in the yard.
HAMON Engine render · work in progress

HAMON

We build a game engine in Rust, games that run on it, and the tools to make both.

A smith's forge in the hills, and the village road below it. Walk in.

The village road below the forge: a few wooden stalls with indigo and persimmon-brown noren and paper lanterns, rice paddies beside the road, the thatched forge at the top.
HAMON Engine render · work in progress

市 The village road

Where the smith's work is shown

A forge sat near water, charcoal and iron sand, at the edge of a farming village. The road below it is where the work was shown. Here each stall carries the name of a part of the sword, and each one is something Hamon makes. Hamon is the house; the rest are its stages.

Browse the stalls →

Nothing is for sale yet. The stalls are being set up.

The village road, closer: stalls with noren and lanterns.
HAMON Engine render · work in progress

店 The stalls

Browse the stalls

Coming soon.

  • 刃文

    Hamon

    The temper line · the house

    The parent of every stall: the engine, the games and the tools.

    Coming soon

    Placeholder · for Jacob to fill in

  • 研師

    Togishi

    The polisher

    Stone by stone, bringing out what is already there.

    Coming soon

    Placeholder · for Jacob to fill in

  • 地肌

    Jihada

    The steel's grain

    The skin of the blade, shown by the polish.

    Coming soon

    Placeholder · for Jacob to fill in

  • 鎺

    Habaki

    The blade collar

    The small fitting that holds the blade true in its scabbard.

    Coming soon

    Placeholder · for Jacob to fill in

  • 鍔

    Tsuba

    The guard

    Between the hand and the edge.

    Coming soon

    Placeholder · for Jacob to fill in

  • 鞘

    Saya

    The scabbard

    What carries and protects the work.

    Coming soon

    Placeholder · for Jacob to fill in

Stall names come from the parts of the sword. Which stall holds which product is still to be decided.

The front of the forge from the work yard: heavy thatch, timber walls, stacked charcoal bales, a single cherry tree in season, firelight inside the open door.
HAMON Engine render · work in progress

庭 The yard

What Hamon is

Three things, built together: an engine, games that run on it, and the tools to make both. Each one lives in a part of this forge.

All of it is early and in active work. The forge you are walking through is itself a scene being built in the engine.

The threshold: daylight on the step, the hearth glowing at the far side of the room.
HAMON Engine render · work in progress

敷居 The threshold

The threshold

“The estate is the blade; Hamon is the gleam the world can see.”

Jacob Scott-Metoyer
Inside the door: the clay hood over the hearth, sparks and smoke, a small shrine shelf on the left wall, tools along the right wall.
HAMON Engine render · work in progress
The hearth The engine The anvil Games Tools along the wall Tools and craft

内 Inside

Step in

Out of the daylight, the room rises out of the dark. Inside, the fire is the light.

Hover or tap the marks in the room, or keep walking.

Close on the hearth: fire in the clay hearth, sparks and smoke, the work block and a coiled rope in the foreground.
HAMON Engine render · work in progress
The anvil Games →

火床 The hearth

The engine

hamon-engine is a Rust and wgpu workspace. It has a native windowed prototype, an ECS runtime, deterministic replay, and a control surface that scripts and agents can drive. Everything on this page was rendered with it.

  • Native windowed prototype, Rust + wgpuprototype
  • ECS, typed CPU runtime, deterministic replay textworking, evolving
  • Control surface: CLI, JSON-RPC and MCPworking, evolving
  • Physics on Rapier, including rope constraintsin progress
  • Lockstep input frames for networkingearly
  • Deformable terrain and a world-rhythm simearly

From the hamon-engine repository, October 2026. The repository is private for now.

The anvil: a small square kanatoko set in a wooden stump beside the glowing hodo, a low tray with a wrapped billet, smoke drifting over the charcoal heap and tongs racked against the wall behind.
HAMON Engine test render, graded down · work in progress

金床 The anvil

The games

Small games built on the engine. They are proving grounds for the engine, not releases. Each one tests a different piece: input, physics, rendering, replay.

  • Aetherline: a small WebGPU browser game. Collect three relics, open the gate.playable build
  • First: the scripted proving target. Deterministic 60 Hz sim with golden-frame checks.test bed
  • Counterpoise: a cargo-balancing puzzle on a real physics beam. Plays in the terminal; no window yet.early
  • Glasswake: the tether-crossing core of a planned adventure. Simulation only, no finished visuals.in progress
  • Inkbound: first-area scaffold for a third-person action game. No art or combat yet.scaffold
The polisher's corner in cool window light: a row of whetstones on a low shelf under a lattice window, a tatami strip, a low stand, a tilted stone board and water tubs.
HAMON Engine test render · work in progress

研 The polishing bench

Tools and craft

研師 Togishi is the polisher. Nothing is added. Stone by stone, the work brings out what is already there.

The editors and command-line tools around the engine:

  • Entity inspector, an optional native editorworking
  • Material constants editorworking
  • Mesh authoring CLI, recipes to GLBworking
  • Asset import, cooking and stale-pack checksworking
  • Experiment receipt verifier (Go)working

Most of the work never shows. The line is the part people see.

A reverse-edge katana and its dark indigo scabbard lie on black, lit by one warm light from above. The temper line glows along the blade.
Rendered with hamon-engine

刀 The sword

Mikazuki Togishi 三日月 研師

Mikazuki Togishi is a sakabatō, a katana with the edge reversed.

Close-up of the blade: a wavy white temper line runs along the steel, with small crescent shapes inside it.
Rendered with hamon-engine

刃文 Hamon is the temper line. Where the hard edge meets the softer spine, the steel shows a pattern.

The hamon, close. Small crescents (uchinoke) sit inside the line.

The hilt: indigo silk wrap with a small gold crescent, a dark iron guard, and a brass collar where the blade begins.
Rendered with hamon-engine

Indigo silk wrap, a dark iron guard, one small gold crescent.

Looking back out of the open forge door at the daylit yard and the drying racks beyond; a pole leans by the frame.
HAMON Engine test render · work in progress

戸 The door

Write to us

hello@hamon.works

Back out to the approach ↑