Do I need the original game files to run Wonder Project J2 Decompilation?

Yes. The project does not include the original game's assets, so you need your own copy.

Wonder Project J2 Decompilation

DecompilationActive

Source code reconstructed from the original game's compiled binary, so the game can be understood, rebuilt and ported.

Based on Wonder Project J2

Image of the original game, Wonder Project J2. This project has no screenshots of its own yet.

Wonder Project J2 (original game, not this project) — Image of the original game, Wonder Project J2. This project has no screenshots of its own yet.

Links, repository & details

About

A work-in-progress decompilation of Wonder Project J2 that builds the wonderprojectj2.jp.z64 ROM.

Getting started

You need your own copy of the game: copy your ROM into the project root as baserom.jp.z64, install the build dependencies on Linux, WSL or macOS, then run make extract followed by make. A successful build prints OK for the built ROM.

Known issues & limitations

The decompilation is a work in progress.

What you need to run it

Original game files required. The project ships code only; you provide your own copy of the game (N64 version).

Additional notes

Compression: Some ROM sections appear to use a custom LZSS variant called SPI, with SPI1, SPI0 and an uncompressed SPIN variant.
Sprites: make extract also extracts the main sprites, but the correct palettes are not yet determined, so most look like gray images.

FAQ

What is Wonder Project J2 Decompilation?: Wonder Project J2 Decompilation is an open-source decompilation of Wonder Project J2. Source code reconstructed from the original game's compiled binary, so the game can be understood, rebuilt and ported. The original game ran on N64.
Do I need the original game files to run Wonder Project J2 Decompilation?: Yes. The project does not include the original game's assets, so you need your own copy.