# Uriopass/Egregoria

3D City Builder without a grid

Repository: https://github.com/Uriopass/Egregoria
Canonical: https://ross.abutalabs.com/products/egregoria
Homepage: http://douady.paris/blog/
Language: Rust
License: GPL-3.0
License Family: copyleft
Topics: society, simulation, rust-lang, emergent-behavior, gamedev, wgpu, 3d, city-builder, game, rust
Last push: 2025-06-02T12:00:14+00:00

## Health v2 (maintenance only)
Score: 34/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 24, release rhythm 8, longevity 100
- inputs: {"age_days": 2490, "days_push": 457, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1637, forks 65 (observed 2026-08-28T04:05:14.918784+00:00)

## What it is
Egregoria is an open-source 3D city-building game written in Rust with wgpu, inspired by Cities: Skylines but without a grid. It emphasizes socio-economic and logistics simulation, where each citizen has its own thought model so individual actions drive emergent collective behavior.

## Use cases
- play an open-source 3D city builder game
- find a free Cities: Skylines alternative
- simulate a city where each citizen makes individual decisions
- watch emergent socio-economic behavior emerge from agent simulation
- contribute to or study a game written in Rust with wgpu rendering
- play a grid-less city building sandbox on desktop

## When to choose
- you want an indie, open-source city builder focused on economy, logistics, and individual agent thought models rather than grid placement
- you want to read, modify, or contribute to a Rust/wgpu game codebase under a GPL license
- you enjoy early-stage projects where you can give feedback on Discord or GitHub issues and shape development

## When to avoid
- you need polished, feature-complete gameplay comparable to commercial city builders, since the game is still in early development
- you need mod support, which is wanted but has no settled design yet
- you want a casual mobile or browser game, since it is a desktop build requiring the Rust toolchain and Git LFS assets

## Facets
- artifact type: application
- maturity: active
- function: game, simulation, graphics
- domain: simulation, gaming-tools, graphics
- platform: cross-platform, windows, rust
- tags: city-builder, 3d, wgpu, indie-game, emergent-behavior, agent-based-simulation, economy-simulation, open-source-game, god-game, urban-simulation, game-development, desktop, macos, linux

## Member repositories
- Uriopass/Egregoria (main) score 34

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:14.918784+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 2026-08-30T03:46:40.284507+00:00, confidence not recorded.
  - readme: https://github.com/Uriopass/Egregoria (fetched 2026-08-28T04:05:14.918784+00:00, sha f7f6fda204be)
  - homepage: http://douady.paris/blog/ (fetched 2026-08-29T11:19:48.005405+00:00, sha 8091115ac1f3)
  - site_page: https://douady.paris/aboutme.html (fetched 2026-08-29T11:19:48.015001+00:00, sha 24bd6f1cf41d)
- Data as of 2026-08-30T08:39:29.467469+00:00.