FourFury
FourFury is a Python library for reading, inspecting, extracting, and editing Grand Theft Auto IV data files. It provides typed APIs for the game's archives, world placements, collision resources, drawables, textures, navigation graphs, animation dictionaries, and related metadata.
[!IMPORTANT] FourFury is under active development. Read support is broader than write support, and some resource types intentionally permit only fixed-size edits.
Format support
| Format | Read | Write | Notes |
|---|---|---|---|
| RPF2 | Yes | Yes | Search, extraction, creation, and unencrypted output |
| RPF3 | Yes | No | Audio archives; hash-only names remain hexadecimal |
| IMG3 | Yes | Yes | Search, extraction, creation, and resource padding handling |
| IDE | Yes | Yes | Lossless definitions with typed archetypes, MLO topology, and model-bound 2DFX lights |
| IPL | Yes | Yes | Lossless sectioned text with typed GTA IV OCCL boxes |
| gta.dat | Yes | Yes | Lossless level manifests, typed directives, device paths, and multi-path entries |
| images.txt | Yes | Yes | Ordered archive lists with explicit placement-sidecar modes |
| water.dat | Yes | Yes | Lossless water triangles and quads, runtime flags, geometry queries, and neutral mesh export |
| WPL | Yes | Yes | Placements, MLO and IDE-light resolution, explicit LOD hierarchies, world portals, and instance flags |
| GTXD | Yes | Yes | Texture-parent chains and cycle detection |
| NOD | Yes | Yes | Navigation nodes, links, costs, and topology validation |
| WNV | Yes | Limited | Navigation meshes, portals, edges, cover points, and quadtrees |
| WBN | Yes | Limited | Collision bounds and fixed-size edits |
| WBD | Yes | Limited | Collision dictionaries and fixed-size edits |
| TUNE | Yes | Lossless text | Fragment physics source configuration |
| WAD | Yes | No | Animation dictionaries, tracks, chunks, and decoded channels |
| WDD | Yes | No | Hash-addressed drawable dictionaries and neutral model projection |
| WDR | Yes | No | Drawables plus neutral model projection |
| WFT | Yes | No | Fragment drawables, physics hierarchy, embedded lights, collision bounds, neutral projection, and IDE light binding |
| WTD | Yes | No | Texture dictionaries and DDS export |
See DOCUMENTATION.md for examples, field behavior, writer constraints, and current limitations.
Installation
FourFury requires Python 3.11 or newer. Install the latest release from PyPI:
python -m pip install fourfury
For an editable installation:
git clone https://github.com/Hancapo/fourfury.git
cd fourfury
python -m pip install -e .
Quick start
Open an archive and read one of its entries:
from pathlib import Path
from fourfury import RpfArchive
game = Path(r"D:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto IV\GTAIV")
with RpfArchive.from_path(game / "pc/data/game.rpf") as archive:
entry = archive.find_entry("data/taskparams.txt")
if entry is not None:
print(entry.read().decode("utf-8"))
Index an entire installation when assets may live in different archives:
from fourfury import GameFileCache, GameFileType
with GameFileCache(game) as cache:
cache.scan()
asset = cache.require_asset("bm_nylamp1", kind=GameFileType.WFT)
fragment = cache.load(asset)
Episode installations can be scanned as effective base-game overlays:
from fourfury import GameEpisode
with GameFileCache.for_episode(game, GameEpisode.THE_LOST_AND_DAMNED) as cache:
cache.scan()
city = cache.map_structure
print(city.summary())
print(city.delta.changed_paths)
Documentation
The complete documentation covers every supported format, resource APIs, neutral WDR models, editing constraints, and known limitations.
Release notes live in CHANGELOG.md.
1 maintainer
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