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Case study

Animal Crossing: a native PC port of the GameCube decompilation

Runs Animal Crossing’s decompiled GameCube C code natively on 32-bit x86, replacing the GX graphics API with an OpenGL 3.3 translation layer and console services with SDL2-based platform code. Game assets are read at startup from the user’s own disc image instead of being shipped. It is a port built on ACreTeam’s ac-decomp, not a matching rebuild of the original executable.

Requirements and limitations

  • The reviewed snapshot is the v0.9.3-playtest pre-release and supports only the USA Rev 0 release (GAFE01_00). The README calls the underlying ac-decomp complete, while the developer documentation calls it 99.52% complete; neither figure was checked here. Online play is not planned, and the Animal Crossing Deluxe mod is incompatible, although this release adapts some of its quality-of-life changes.
  • Requires the user’s own Animal Crossing (USA) disc image in ISO, GCM or CISO form; at startup the port loads main.dol, foresta.rel.szs and about 2,500 assets from it in memory. The README states that the repository contains no game assets or assembly. Saves use Dolphin-compatible GCI files, and optional HD texture packs use Dolphin’s naming format.
  • Windows is the primary target: the documented build uses an MSYS2 MINGW32 shell with 32-bit MinGW GCC, CMake 3.16+ and SDL2, plus vendored GLAD for an OpenGL 3.3 Core context. Builds must be 32-bit, unoptimized (-O0) and define NDEBUG, because the decompiled code casts pointers to 32-bit values and contains optimization-sensitive undefined behavior. Linux i686 is described as compiling and linking but is not officially supported.
  • About 100 decompilation files carry TARGET_PC changes, and optional PC_ENHANCEMENTS add settings, MSAA and texture-pack loading. The project describes Windows as fully tested and records an unresolved bass-distortion audio issue, but publishes no automated tests or byte-matching checks for the port. Equivalence with the GameCube original is not established, and this review did not build or run it.
  • LICENSE keeps the decompilation code under CC0 1.0 from ac-decomp and licenses the pc/ layer and TARGET_PC additions under MIT, with a separate MIT notice for FixNES; GitHub classifies no single license. Game content rights are separate. The README discloses that AI tools such as Claude were used for port code only; no REA use is established.

About this entry

Type
Case study
Category
Independent reconstruction cases
Relationship
Independent reconstruction project
Targets
Game

Sources reviewed

The description was reviewed against primary sources. This does not establish runtime testing, security auditing or verified compatibility.

Primary sources

  1. README.md GitHub · flyngmt/ACGC-PC-Port · Revision 4099d24
  2. pc/DOCUMENTATION.md GitHub · flyngmt/ACGC-PC-Port · Revision 4099d24
  3. FAQ.md GitHub · flyngmt/ACGC-PC-Port · Revision 4099d24
  4. build_pc.sh GitHub · flyngmt/ACGC-PC-Port · Revision 4099d24
  5. pc/CMakeLists.txt GitHub · flyngmt/ACGC-PC-Port · Revision 4099d24
  6. LICENSE GitHub · flyngmt/ACGC-PC-Port · Revision 4099d24
  7. https://github.com/flyngmt/ACGC-PC-Port/releases/tag/v0.9.3-playtest