What it does
Open the game's archives, look inside every file and change them safely. SparkIV reads the files of your own copy of the game; it contains no game data.
Archives
Browse the IMG and RPF archives of GTA IV, The Lost and Damned and The Ballad of Gay Tony.
Cutscenes .cut
Plays the cutscenes with cast, camera, lights, sound and location, lit and shaded the way the game does it.
Models .wdr .wdd .wft
Models in 3D, with their textures and shaders.
Textures .wtd
View and export the textures of a dictionary.
Animations .wad
Play the animations of a dictionary.
Audio .ivaud
Listen to sound banks, including multichannel tracks, and export them.
Scripts .sco
Decompiled or disassembled mission scripts.
Collision .wbn .wbd
See the collision of the map.
Editing
Replace and import files in an edit mode. The original of every file is backed up before SparkIV first writes to it.
Get started
A legally owned copy of GTA IV or Episodes from Liberty City for PC is required.
Download
Get reditec.SparkIV-win-Setup.exe from the releases.
Install
Run it. As the app isn't signed yet, Windows may warn you: choose "More info", then "Run anyway".
Open your game
SparkIV finds the game folder or asks for it. New versions install with one click and show what's new; the channel is set in Settings → Updates.
What's new in 0.9.0 Alpha 3
Released on October 28, 2026. Cutscenes look more like the game, above all the water, the sky and the light.
- The water mirrors as in the game – far buildings only, no ground, broken up by its waves.
- The water's waves are there from the start, breaking up its mirror as in the game.
- The sky is no longer too white and the clouds no longer pink.
- Depth of field also blurs the foreground, and the picture is softened as in the game.
- Lamps light walls and rooms as in the game.
- See-through glass shows its reflection as in the game.
- Cutscene lights light faces as brightly as in the game.
- After an update, SparkIV shows what's new right away.
All versions: changelog · release on GitHub
Where it's heading
Version 1.0 will be the first that fully supports GTA IV on PC:
- every file of the game opens;
- all cutscenes look as they do in the game;
- export, edit and import, compatible with OpenIV's openFormats.
Known differences from the game are tracked in the issues.
Open source
SparkIV is free software under the GNU General Public License v3.
It was started by aru in 2008 and carried on by Ahmed Walid and Silent Spud; reditec has rebuilt it as a WinUI app since 2026. Contributions and bug reports are welcome on GitHub.
