# Abyssal: a Godot engine for DEEP using the player's JAR

> Abyssal reimplements the mobile game DEEP in a Godot engine for desktop, browser and Android. It converts a player-provided MIDlet JAR locally, decoding resources and evaluating selected class-file data tables to supply the engine. The implementation covers submarine piloting, stations, trading, missions and combat.

- 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/TheWWWorm/abyssal>
- Primary source: <https://github.com/TheWWWorm/abyssal/blob/670de94fe160873897502bb81e6f51dc11899043/README.md>
- Catalog page: <https://awesomerea.org/resources/abyssal-deep-case/>
- Record JSON: <https://awesomerea.org/resources/abyssal-deep-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/abyssal-deep-case/index.md)

## Requirements & limits

- **Prerequisites:** Playing requires a user's own compatible DEEP MIDlet JAR.
- **Prerequisites:** The browser build requires WebGL 2 and a desktop-class browser; self-hosting requires HTTPS.
- **Prerequisites:** Source development requires Godot 4.7 Standard and Python 3.10+; direct JAR conversion also requires JDK 17+ and FFmpeg.
- **Testing evidence:** The author reports that several platform builds have not been checked on physical hardware.
- **License:** Apache-2.0 license for the engine's own source and artwork.

## Primary sources

1. <https://github.com/TheWWWorm/abyssal/blob/670de94fe160873897502bb81e6f51dc11899043/README.md>

## More in Games

- [AgainROM: a new engine for Rage of Mages](https://awesomerea.org/resources/againrom-rage-of-mages-case/index.md) · Case study
- [Age of Empires Free Software Remake: a re-implementation on the original data](https://awesomerea.org/resources/aoe-free-software-remake-case/index.md) · Case study
- [Angelica Wardrobe: rebuilding Perfect World's fashion window](https://awesomerea.org/resources/angelica-wardrobe-case/index.md) · Case study
- [Angry Birds PC engine: reimplementing the game engine from executable analysis](https://awesomerea.org/resources/angry-birds-pc-engine-case/index.md) · Case study
- [Another World Suite: a WebAssembly engine and debugger](https://awesomerea.org/resources/another-world-suite-case/index.md) · Case study
- [Arcanum: a Unity engine reimplementation on the original game data](https://awesomerea.org/resources/arcanum-unity-reimplementation-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.