# CytopiaTeam/Cytopia

:deciduous_tree::house_with_garden::office::evergreen_tree: A city building simulation game

Repository: https://github.com/CytopiaTeam/Cytopia
Canonical: https://ross.abutalabs.com/products/cytopia
Homepage: https://www.cytopia.net
Language: C++
License: GPL-3.0
License Family: copyleft
Topics: city-builder, sdl, pixel-art
Last push: 2025-12-26T23:00:33+00:00

## Health v2 (maintenance only)
Score: 49/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 59, release rhythm 8, longevity 100
- inputs: {"age_days": 3057, "days_push": 250, "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 2152, forks 129 (observed 2026-08-28T04:06:19.402152+00:00)

## What it is
Cytopia is a free, open-source retro pixel-art city building simulation game with a focus on modding. It uses a custom isometric rendering engine written in C++ and based on SDL2.

## Use cases
- play a free open-source city building game
- build and manage a pixel-art city simulation
- create mods for a city builder game
- run an isometric city sim on linux windows or mac
- explore an open-source SDL2 game codebase
- edit tile data with a Qt-based tile editor

## When to choose
- you want a free, open-source alternative to SimCity-style city builders
- you care about moddability and pixel-art aesthetics
- you want to study or contribute to a C++ SDL2 game engine
- you need a game that runs on Linux, Windows, and macOS

## When to avoid
- you want polished AAA-style 3D graphics or an OpenGL renderer (still planned)
- you need full gameplay mechanics depth comparable to commercial city builders
- you need mobile support (Android/iOS is still planned)
- you want a game with built-in mod downloading or mod scripting (planned, not implemented)

## Facets
- artifact type: application
- maturity: active
- function: game-engine, graphics, simulation
- domain: gaming-tools, simulation, cross-platform
- platform: windows, cpp, cross-platform
- tags: city-builder, pixel-art, sdl2, isometric, open-source-game, modding, procedural-generation, game-development, linux, macos

## Member repositories
- CytopiaTeam/Cytopia (main) score 49

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:19.402152+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 2026-08-30T02:50:38.988988+00:00, confidence not recorded.
  - readme: https://github.com/CytopiaTeam/Cytopia (fetched 2026-08-28T04:06:19.402152+00:00, sha cee2c64c3ee1)
  - homepage: https://www.cytopia.net (fetched 2026-08-29T10:30:44.508055+00:00, sha d15d3e3a1985)
  - site_page: https://cytopia.net/about-us (fetched 2026-08-29T10:30:44.517388+00:00, sha e20989a030e8)
- Data as of 2026-08-30T08:39:29.467469+00:00.