# Harold: reimplementing the Fallout 2 engine for browsers

> Harold reimplements the Fallout 2 engine in TypeScript and Python for WebGL 2 browsers, building on darkfo. Setup converts archives and assets from a user's installed copy; the current engine covers map loading, movement, dialogue and some quests while documenting incomplete combat and saving.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/OldGamesLab/Harold>
- Primary source: <https://github.com/OldGamesLab/Harold/blob/d143afa4e505676f22a17f5692149aa8171935bb/README.md>
- Catalog page: <https://awesomerea.org/resources/harold-fallout-2-case/>
- Record JSON: <https://awesomerea.org/resources/harold-fallout-2-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/harold-fallout-2-case/index.md)

## Requirements & limits

- **Prerequisites:** An installed copy of Fallout 2 and a browser with WebGL 2 support.
- **Prerequisites:** Python 3.9 or newer, Pipenv, Node.js and TypeScript; an HTTP server for browser loading.
- **Limits:** The remake is incomplete; saving and loading are experimental.
- **License:** Apache License 2.0.

## Primary sources

1. <https://github.com/OldGamesLab/Harold/blob/d143afa4e505676f22a17f5692149aa8171935bb/README.md>
2. <https://github.com/OldGamesLab/Harold/blob/d143afa4e505676f22a17f5692149aa8171935bb/LICENSE.txt>

## More in Games

- [Hazard: Revenge — a reconstructed Hazard engine using SDL](https://awesomerea.org/resources/hazard-revenge-case/index.md) · Case study
- [Helion: rebuilding a Doom-compatible engine](https://awesomerea.org/resources/helion-doom-engine-case/index.md) · Case study
- [HERCULAN Engine: reimplementing Earthsiege 2 from retail binaries](https://awesomerea.org/resources/herculan-earthsiege-2-case/index.md) · Case study
- [hercules-native: rebuilding Disney's Hercules Action Game on Apple silicon](https://awesomerea.org/resources/hercules-native-case/index.md) · Case study
- [Heroes of Jin Yong: reimplementing the DOS game](https://awesomerea.org/resources/heroes-of-jinyong/index.md) · Case study
- [Hexwaste: reimplementing a slice of the Fallout 2 engine](https://awesomerea.org/resources/hexwaste-case/index.md) · Case study

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.