# lo-th/3d.city

3d city builder game

Repository: https://github.com/lo-th/3d.city
Canonical: https://ross.abutalabs.com/products/3dcity
Homepage: http://lo-th.github.io/3d.city/index.html
Language: JavaScript
License: NOASSERTION
License Family: other
Last push: 2026-04-16T23:19:25+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 77, release rhythm 35, longevity 100
- inputs: {"age_days": 4471, "days_push": 139, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1735, forks 356 (observed 2026-08-28T04:05:29.015810+00:00)

## What it is
3d.city is an open-source, browser-based 3D city building game rendered with Three.js via WebGL2 or WebGPU. It uses the micropolisJS simulation engine running in a Web Worker to keep rendering smooth while simulating city growth.

## Use cases
- play a 3d city builder in the browser without installing anything
- build and simulate a city like simcity in a web tab
- explore an open-source city building game
- study how to combine three.js rendering with a web worker simulation
- try a webgpu-powered 3d game demo

## When to choose
- you want a free, no-install city building game playable in any modern browser
- you want to inspect or fork an open-source 3d city simulator built on three.js and micropolisJS
- you want a lightweight webgl2/webgpu gaming demo

## When to avoid
- you need a full-featured commercial city builder with deep mechanics and save/load polish
- you need a native desktop or mobile game
- you require guaranteed stability — the project is a long-term work in progress with an active roadmap

## Facets
- artifact type: application
- maturity: active
- function: game-engine, graphics, simulation
- domain: gaming-tools, web-development, simulation
- platform: browser, cross-platform
- tags: city-builder, threejs, webgl2, webgpu, simcity, browser-game, open-source-game, game-development, web-server

## Member repositories
- lo-th/3d.city (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:29.015810+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:30:49.844218+00:00, confidence not recorded.
  - readme: https://github.com/lo-th/3d.city (fetched 2026-08-28T04:05:29.015810+00:00, sha 5af9035b75a3)
  - homepage: http://lo-th.github.io/3d.city/index.html (fetched 2026-08-29T11:08:20.026175+00:00, sha a34201103dbb)
- Data as of 2026-08-30T08:39:29.467469+00:00.