# ncsoft/Unreal.js

Unreal.js: Javascript runtime built for UnrealEngine

Repository: https://github.com/ncsoft/Unreal.js
Canonical: https://ross.abutalabs.com/products/unrealjs
License: NOASSERTION
License Family: other
Topics: unrealengine, javascript, scripting, plugin
Last push: 2023-07-20T09:03:36+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3941, "days_push": 1140, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3750, forks 347 (observed 2026-08-28T04:08:17.661346+00:00)

## What it is
Unreal.js is an Unreal Engine plugin that embeds a V8-powered JavaScript runtime, giving scripts full access to the Unreal Engine API with live reload and debugging support. It supports CommonJS modules, npm libraries, editor extension bridges, and auto-generated TypeScript definitions for VS Code.

## Use cases
- script unreal engine gameplay logic in javascript
- extend the unreal editor with javascript tools
- hot-reload game scripts without recompiling c++
- subclass blueprints and engine classes from javascript
- debug javascript inside unreal with vscode or webstorm
- use npm libraries inside unreal engine projects

## When to choose
- your team prefers javascript over c++ or blueprints for game logic
- you need rapid iteration with live-reloaded scripts in unreal engine
- you want to reuse existing javascript libraries in a game project

## When to avoid
- you target unreal engine versions beyond 5.1 or need guaranteed ongoing support
- you need maximum runtime performance from compiled native code
- your project requires a permissively documented license for commercial review

## Facets
- artifact type: plugin
- maturity: maintenance
- function: interpreter, plugin-system, developer-tools
- domain: programming-languages, developer-tools
- platform: windows, cross-platform, game-engine
- tags: unreal-engine, javascript, v8, scripting, game-scripting, live-reload, game-development, macos, linux, android, ios

## Member repositories
- ncsoft/Unreal.js (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:17.661346+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 2026-08-29T18:29:00.618720+00:00, confidence not recorded.
  - readme: https://github.com/ncsoft/Unreal.js (fetched 2026-08-28T04:08:17.661346+00:00, sha aadc878e6bb2)
- Data as of 2026-08-30T08:39:29.467469+00:00.