# REFLEC BEAT plus: reconstructed iOS game source

> REFLEC BEAT plus reconstructs Objective-C and C++ source for version 4.5.8 of the iOS rhythm game. The project uses Objective-C metadata, C++ RTTI, embedded strings, and original path fragments to organize the recovered routines; a separate OpenAPI file describes requests observed in the client. Building requires a user-supplied IPA for game assets.

- Type: Case study
- Targets: Game · Protocol
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/Tatsh/expert-xylophone>
- Primary source: <https://github.com/Tatsh/expert-xylophone/blob/3164e1cacf9ab9ff97510a43bcb7aaff7b068943/README.md>
- Catalog page: <https://awesomerea.org/resources/reflec-beat-plus-source-case/>
- Record JSON: <https://awesomerea.org/resources/reflec-beat-plus-source-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/reflec-beat-plus-source-case/index.md)

## Requirements & limits

- **Prerequisites:** A user-supplied REFLEC BEAT plus IPA with game assets is required.
- **Prerequisites:** Building requires macOS, Xcode, an iOS toolchain, and CMake 3.14 or newer for the CMake path.
- **Limits:** The built app is unsigned and must be signed for device use.
- **License:** MIT license.

## Primary sources

1. <https://github.com/Tatsh/expert-xylophone/blob/3164e1cacf9ab9ff97510a43bcb7aaff7b068943/README.md>

## More in Games

- [ReFreedomFighters: reconstructing Freedom Fighters formats and functions](https://awesomerea.org/resources/refreedomfighters-case/index.md) · Case study
- [Reko-Btech: Crescent Hawks image and map format findings](https://awesomerea.org/resources/reko-btech-case/index.md) · Case study
- [ReMoM: reconstructing Master of Magic from its executables](https://awesomerea.org/resources/remom-master-of-magic-case/index.md) · Case study
- [Resident Evil 1: PC decompilation and modern platform port](https://awesomerea.org/resources/resident-evil-1-pc-decomp-case/index.md) · Case study
- [Resident Evil: Code: Veronica X — decompiling the GameCube release](https://awesomerea.org/resources/recvx-gc-decomp/index.md) · Case study
- [Retro-Sonic 3D: a decompilation with an SDL/OpenGL renderer](https://awesomerea.org/resources/retro-sonic-3d-decompilation-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.