murder-unpack 0.1.3

Decompile, unpack, recover, and repack tools for Murder Engine games

murder-unpack

Decompile, unpack, recover, and repack toolkit for Murder Engine games.

Reverse-engineers exported Murder Engine games back into editor-openable projects. Extracts sprites, dialogues, world data, and more. Supports Windows, Linux, and macOS game builds.

Features

• Full project recovery — Reconstructs a Murder Engine editor project from an exported game
• Asset extraction — Unpack all .gz data files into individual JSON assets
• Sprite extraction — Extract individual sprites from texture atlas sheets as PNG
• Dialogue export — Reconstruct .gum scripts (Murder's dialogue format) and export to markdown
• Binary analysis — Detect .NET deployment format (NativeAOT, single-file bundle, self-contained)
• Bundle extraction — Extract managed assemblies from .NET single-file bundles
• C# stub generation — Auto-generate typed C# classes from packed JSON data
• Engine management — Clone any Murder Engine version (branch/tag/commit)
• Repacking — Repack modified assets back into the game's .gz format
• Plugin system — Extend with drop-in .py files or pip-installable packages
• Cross-platform — Works on Windows, Linux, and macOS; handles all three platforms' binaries

Quick Start

Requirements

• Python 3.11+
• uv (recommended) or pip
• Git (for engine cloning)

Install

# With uv (recommended)
uv tool install murder-unpack

# Or from source
git clone https://github.com/yuna0x0/murder-unpack.git
cd murder-unpack
uv sync

Basic Usage

# Show game info and asset counts
murder-unpack info "path/to/game"

# Extract all data, sprites, and dialogues
murder-unpack extract-all "path/to/game" output/

# List all assets (with optional filters)
murder-unpack list-assets "path/to/game" --type WorldAsset

# Recover into a full editor project
murder-unpack recover "path/to/game" recovered/ --engine-version main

Commands

Extraction

Command	Description
info <game_dir>	Show game info, asset counts, and atlas list
extract-all <game_dir> <output_dir>	Full extraction: data, sprites, dialogues, and localization
extract-data <game_dir> <output_dir>	Dump all .gz data files as plain JSON
extract-sprites <game_dir> <output_dir>	Extract sprites from atlas sheets as PNG
extract-dialogue <game_dir> <output_dir>	Export dialogues as .gum scripts, markdown, or both
list-assets <game_dir>	List assets with --type and --name filters
decode-qoi <input.qoi.gz> <output.png>	Convert a single QOI image to PNG

Recovery

Command	Description
recover <game_dir> <output_dir>	Full editor project recovery
engine-versions	List available Murder Engine branches and tags
repack <project_dir> <output_dir>	Repack modified assets back into .gz format

Recovery Options

murder-unpack recover "path/to/game" recovered/ \
    --engine-version rel/11.0 \    # Branch, tag, or commit hash
    --game-name MyGame \           # Project name (auto-detected if omitted)
    --skip-engine \                # Don't clone engine (link manually)
    --engine-path /path/to/murder  # Use existing engine clone
    --no-stubs                     # Skip C# stub generation

Binary Analysis

Command	Description
analyze-binary <exe_path>	Detect format, extract type names

# Analyze and extract assemblies from a Windows build
murder-unpack analyze-binary game.exe \
    --extract-assemblies extracted/ \
    --decompile decompiled/

Plugins

Command	Description
plugins list	List loaded plugins
plugins dir	Show plugin directories

How It Works

Game Data Format

Murder Engine exports games as GZip-compressed JSON:

File	Contents
preload_data.gz	Preload assets + total data file count
data0.gz — dataN.gz	Up to 500 game assets per file
sounds.gz	FMOD audio bank paths
atlas/*.json	Sprite atlas metadata (UV coords, trim areas)
atlas/*.qoi.gz	Texture sheets in QOI format, gzipped
game_config	Game profile configuration (JSON)

Recovery Process

1. Load — Decompress all .gz files, parse JSON, index 5000+ assets
2. Split — Write each asset as an individual .json file in the correct editor directory
3. Scaffold — Generate .sln, .csproj, Program.cs matching the hellomurder template
4. Resources — Copy atlas, fonts, shaders, sounds, images, video, FMOD libs, icons
5. Dialogues — Reconstruct .gum dialogue scripts from compiled CharacterAsset data
6. Localization — Export localization CSV files for each language (matching editor format)
7. Stubs — Auto-generate C# stub classes for game-specific types (e.g., Road.Assets.*)
8. Engine — Clone Murder Engine at the specified version with submodules

Binary Detection

Supports all .NET deployment formats across all platforms:

Format	Windows	Linux	macOS
NativeAOT	PE	ELF	Mach-O
Single-file bundle	PE	ELF	Mach-O
Self-contained	.exe + coreclr.dll	binary + libcoreclr.so	binary + libcoreclr.dylib
Framework-dependent	.dll + .runtimeconfig.json	same	same

Plugin System

Drop-in Plugins

Place .py files in ~/.murder-unpack/plugins/ or ./plugins/:

# plugins/my_handler.py
def register(registry):
    registry.asset_handlers["my_handler"] = MyHandler()

class MyHandler:
    name = "my_handler"
    asset_types = ["Custom.Assets.MyAsset"]

    def parse(self, asset_data):
        return asset_data

    def export(self, asset, output_path):
        output_path.write_text(str(asset))

Pip-installable Plugins

# In your plugin's pyproject.toml
[project.entry-points."murder_unpack.asset_handlers"]
my_handler = "my_plugin:MyHandler"

[project.entry-points."murder_unpack.commands"]
my_cmd = "my_plugin.cli:my_command"

Development

git clone https://github.com/yuna0x0/murder-unpack.git
cd murder-unpack
uv sync
uv run murder-unpack --help

# Install with binary analysis support
uv sync --extra binary

# Run tests
uv run pytest

License

MIT - yuna0x0