# CR1:U: a reconstructed Chaos Rings engine for original game data

> CR1:U reimplements Chaos Rings as a native C++ engine using behavior and format findings from the iPad HD release. It loads original iOS, Android or Vita data from the user's copy and includes parsers for archives, events, models, textures, audio and saves.

- Type: Case study
- Targets: App · 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/DuIslingr/CR1-U>
- Primary source: <https://github.com/DuIslingr/CR1-U/blob/d1eb03fb6f3a36d41f78100747543ab940504d2f/README.md>
- Catalog page: <https://awesomerea.org/resources/cr1-u-chaos-rings-case/>
- Record JSON: <https://awesomerea.org/resources/cr1-u-chaos-rings-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/cr1-u-chaos-rings-case/index.md)

## Requirements & limits

- **Prerequisites:** A personal copy of a supported iOS, Android or Vita Chaos Rings release is required.
- **Prerequisites:** Building uses C++17 and SDL3, with Vulkan 1.3 or an OpenGL fallback.
- **License:** The repository's own code is GPL-2.0-or-later; bundled libraries retain their own licenses.

## Primary sources

1. <https://github.com/DuIslingr/CR1-U/blob/d1eb03fb6f3a36d41f78100747543ab940504d2f/README.md>
2. <https://github.com/DuIslingr/CR1-U/blob/d1eb03fb6f3a36d41f78100747543ab940504d2f/docs/ANDROID.md>

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## 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.