Case study

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.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06

Stars: 15
Last commit: 2026-11-09
Language: C++
License (GitHub): CC0-1.0

GitHub data as of 2026-11-09

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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.

Cite

BibTeX

@misc{acnl-decomp-case,
  title = {{acnl-decomp: reconstructing Animal Crossing: New Leaf code and CRO modules}},
  howpublished = {\url{https://github.com/RedShyGuy/acnl-decomp}},
  url = {https://github.com/RedShyGuy/acnl-decomp},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/acnl-decomp-case/}}
}

Plain text

acnl-decomp: reconstructing Animal Crossing: New Leaf code and CRO modules. https://github.com/RedShyGuy/acnl-decomp (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/acnl-decomp-case/

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Primary sources

README.md GitHub · RedShyGuy/acnl-decomp · Revision 86f9a9d
docs/cro.md GitHub · RedShyGuy/acnl-decomp · Revision 86f9a9d