# excaliburjs/Excalibur

🎮 Your friendly TypeScript 2D game engine for the web 🗡️

Repository: https://github.com/excaliburjs/Excalibur
Canonical: https://ross.abutalabs.com/products/excalibur
Homepage: https://excaliburjs.com
Language: TypeScript
License: BSD-2-Clause
License Family: permissive
Topics: excalibur, game-development, game-engine, gamedev, typescript, html5-canvas, game-framework, games, excaliburjs
Last push: 2026-08-26T14:32:28+00:00

## Health v2 (maintenance only)
Score: 86/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 62, longevity 100
- inputs: {"age_days": 4988, "days_push": 7, "days_rel": 253, "gap_med": 12, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2336, forks 226 (observed 2026-08-28T04:06:38.054383+00:00)

## What it is
Excalibur is a free, open-source 2D game engine written in TypeScript for building HTML5 canvas games in the browser. It provides batteries-included engine features like actors, scenes, and cross-platform browser targeting so developers can focus on game design.

## Use cases
- build a 2D game in typescript for the browser
- make an html5 canvas platformer
- create a flappy bird clone
- develop browser games that work on mobile
- package a web game for desktop with electron

## When to choose
- you want a TypeScript-first 2D engine for web games
- you need batteries-included defaults without boilerplate engine code
- you want a free BSD-licensed engine usable in commercial projects

## When to avoid
- you need a stable 1.0 API since breaking changes still occur in 0.x
- you are building 3D games
- you target native platforms without a JS packaging wrapper

## Facets
- artifact type: framework
- maturity: active
- function: game-engine, graphics, animation
- domain: web-development, cross-platform
- platform: browser, cross-platform
- tags: typescript, html5-canvas, 2d-games, gamedev, browser-games, game-development, web-server

## Member repositories
- excaliburjs/Excalibur (main) score 86

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:38.054383+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 2026-08-30T02:37:35.876189+00:00, confidence not recorded.
  - readme: https://github.com/excaliburjs/Excalibur (fetched 2026-08-28T04:06:38.054383+00:00, sha eab2972f0ed7)
  - homepage: https://excaliburjs.com (fetched 2026-08-29T10:18:21.901975+00:00, sha 5de9012dbcda)
  - site_page: https://excaliburjs.com/docs (fetched 2026-08-29T10:18:21.904421+00:00, sha c42d3c70e10a)
  - site_page: https://excaliburjs.com/docs/excalibird-flappy-bird (fetched 2026-08-29T10:18:21.906527+00:00, sha 8749a19dd098)
- Data as of 2026-08-30T08:39:29.467469+00:00.