# acnl-decomp: reconstructing Animal Crossing: New Leaf code and CRO modules

> acnl-decomp reconstructs the USA 1.5 release of Animal Crossing: New Leaf – Welcome amiibo as C++ source for its main code and CRO modules. Its GCC build checks implemented functions against a user-supplied dump using call order, member accesses, constants, references, and decisions rather than byte identity.

- 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/RedShyGuy/acnl-decomp>
- Primary source: <https://github.com/RedShyGuy/acnl-decomp/blob/86f9a9df4e9ba3402f033b713a9d89b08a6591c0/README.md>
- Catalog page: <https://awesomerea.org/resources/acnl-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/acnl-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/acnl-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** A personal game dump with decrypted ExeFS/RomFS, code.elf, and CRO files.
- **Prerequisites:** Python 3.10+, CMake 3.20+, Ninja, devkitARM, and picasso.
- **Limits:** The linked code.elf target is expected to fail until more code is decompiled.
- **License:** CC0 1.0 license for the project's own files.

## Primary sources

1. <https://github.com/RedShyGuy/acnl-decomp/blob/86f9a9df4e9ba3402f033b713a9d89b08a6591c0/README.md>
2. <https://github.com/RedShyGuy/acnl-decomp/blob/86f9a9df4e9ba3402f033b713a9d89b08a6591c0/docs/cro.md>

## More in Games

- [acnlwa-decomp: an Animal Crossing: New Leaf decompilation](https://awesomerea.org/resources/acnlwa-decomp-case/index.md) · Case study
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- [Air-Sea Battle: an annotated Atari 2600 disassembly](https://awesomerea.org/resources/air-sea-battle-disassembly-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.