# amzeratul/halley

A lightweight game engine written in modern C++

Repository: https://github.com/amzeratul/halley
Canonical: https://ross.abutalabs.com/products/halley
Homepage: https://discord.gg/T7qQqQJ
Language: C
License: Apache-2.0
License Family: permissive
Last push: 2026-08-26T22:14:11+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 3992, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3855, forks 177 (observed 2026-08-28T04:08:27.174856+00:00)

## What it is
Halley is a lightweight, code-first game engine written in modern C++17, featuring a true entity-component-system architecture, modern graphics pipelines, and hot-reloading for fast iteration. It was used to ship the commercial game Wargroove on Windows, Mac, Nintendo Switch, Xbox One, and PS4.

## Use cases
- build a 2D or lightweight game in modern C++
- ship a game to consoles like Switch, Xbox, and PS4
- use an entity-component-system game engine without a heavy editor
- get hot-reloading for fast game development iteration
- write a code-first game engine project with first-class shader support
- add Lua scripting to a C++ game

## When to choose
- you want a modern C++17 engine with proven console shipping experience
- you prefer code-first workflows over editor-driven ones
- you need a high-performance ECS architecture
- you want cross-platform support including consoles

## When to avoid
- you need a full-featured visual editor like Unity or Godot
- you want a beginner-friendly engine with extensive tutorials and samples
- you need to support legacy platforms like Windows XP or old mobile devices
- you prefer engines with large asset store ecosystems

## Facets
- artifact type: framework
- maturity: active
- function: game-engine, graphics, audio-processing, networking, editor, ui-components
- domain: graphics, cross-platform
- platform: cpp, windows, game-engine
- tags: cpp17, ecs, entity-component-system, hot-reloading, shader-support, console-games, lua-scripting, code-first, entity-framework, game-development, macos, linux, android, ios

## Member repositories
- amzeratul/halley (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:27.174856+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 2026-08-29T18:25:56.100085+00:00, confidence not recorded.
  - readme: https://github.com/amzeratul/halley (fetched 2026-08-28T04:08:27.174856+00:00, sha 9011e33a3f9a)
  - homepage: https://discord.gg/T7qQqQJ (fetched 2026-08-29T09:20:26.474287+00:00, sha 67a5e31c4f66)
- Data as of 2026-08-30T08:39:29.467469+00:00.