# Animal Crossing: matching GameCube decompilation

> Reconstructs Animal Crossing’s GameCube code as C and C++ source that rebuilds the USA release’s main executable and its foresta.rel module. The dtk-template build reads the original binaries and assets from a user-supplied disc image, then checks both outputs against SHA-1 hashes. A separate native PC port builds on it; completeness figures remain project-reported here.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-10-18
- Added to the catalog: 2026-10-18
- Original resource: <https://github.com/ACreTeam/ac-decomp>
- Primary source: <https://github.com/ACreTeam/ac-decomp/blob/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c/README.md>
- Catalog page: <https://awesomerea.org/resources/animal-crossing-gamecube-decomp-case/>
- Record JSON: <https://awesomerea.org/resources/animal-crossing-gamecube-decomp-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/animal-crossing-gamecube-decomp-case/index.md)

## Requirements & limits

- **Prerequisites:** Requires the user’s own Animal Crossing (USA) disc image; README states the repository contains no game assets or assembly. The build configuration expects the disc’s main.dol to match a recorded SHA-1 before splitting it, so other revisions or modified images are not supported inputs.
- **Prerequisites:** Windows builds use native Python and ninja; macOS adds wine-crossover, and Linux uses an automatically downloaded wibo wrapper on x86 or Wine elsewhere. configure.py downloads pinned decomp-toolkit, binutils, Metrowerks CodeWarrior GameCube compiler, objdiff and sjiswrap releases; objdiff supports per-object diffing.
- **Scope:** README lists one supported version, USA Rev 0 (GAFE01_00). configure.py also defines an Australia Rev 0 (GAFU01_00) target, but CI builds only the USA version and 19 objects are marked matching for USA alone. The outputs are a GameCube DOL and REL module, not a PC executable.
- **Testing evidence:** The default ninja target runs decomp-toolkit’s SHA-1 check of static.dol and foresta.rel against build.sha1. configure.py lists 4,005 objects as matching and none as non-matching, and CI builds with a private container that supplies the original files. The mutable decomp.dev page reports 100.00% decompiled and fully linked at this commit.
- **License:** The repository is dedicated under CC0 1.0. Original game content and the downloaded toolchain binaries are outside that dedication and keep their own rights.

## Primary sources

1. <https://github.com/ACreTeam/ac-decomp/blob/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c/README.md>
2. <https://github.com/ACreTeam/ac-decomp/blob/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c/configure.py>
3. <https://github.com/ACreTeam/ac-decomp/blob/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c/config/GAFE01_00/build.sha1>
4. <https://github.com/ACreTeam/ac-decomp/blob/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c/config/GAFE01_00/config.yml>
5. <https://github.com/ACreTeam/ac-decomp/blob/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c/tools/project.py>
6. <https://github.com/ACreTeam/ac-decomp/blob/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c/.github/workflows/build.yml>
7. <https://github.com/ACreTeam/ac-decomp/blob/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c/LICENSE>
8. <https://decomp.dev/ACreTeam/ac-decomp>
9. <https://web.archive.org/web/20261020041854/https://decomp.dev/ACreTeam/ac-decomp/GAFE01_00/09ca8e8b5b24e6ab44047ee980cf0088ad7ecb4c.json>
10. <https://github.com/flyngmt/ACGC-PC-Port/blob/4099d246c927e75b4fd342ca13f4ac4395c55af5/README.md>

## More in Games

- [Animal Crossing: Wild World: matching Korean DS decompilation with differential runtime checks](https://awesomerea.org/resources/animal-crossing-wild-world-decomp-case/index.md) · Case study
- [Animal Forest: an in-progress matching N64 decompilation](https://awesomerea.org/resources/animal-forest-n64-decomp-case/index.md) · Case study
- [BFM-decomp: Brave Fencer Musashi matching decompilation](https://awesomerea.org/resources/bfm-decomp-case/index.md) · Case study
- [Breath of the Wild: per-function matching decompilation of the Switch executable](https://awesomerea.org/resources/botw-decomp-case/index.md) · Case study
- [Castlevania: Symphony of the Night: matching decompilation across PlayStation, PSP and Saturn builds](https://awesomerea.org/resources/sotn-matching-decomp-case/index.md) · Case study
- [DX-Ball: an REA-guided function-level reconstruction with Codex](https://awesomerea.org/resources/dx-ball-rea-reconstruction-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.