Fusion Fix is a full mod for Grand Theft Auto IV: The Complete Edition. It tries to fix a lot of technical problems, bugs, and limitations that the official updates didn't fix. This project is a community-led effort to bring back and make better the Grand Theft Auto IV experience on newer systems.

NOTE. The main focus of this project is The Complete Edition. Any issues in other game versions will have lower priority.
NOTE. Please report any issues directly on GitHub.

“We are very excited to be releasing the PC version of Grand Theft Auto IV,” said Sam Houser, Founder of Rockstar Games. “The whole team is dedicated to bringing an amazing gaming experience to PC, and the game looks and plays beautifully. We cannot wait for people to play it.”

You can find the full list of fixes and improvements on the Fusion Fix GitHub. Here are some of the main highlights.

General fixes
– Fixed z-fighting
– Fixed soft particles
– Fixed emissive shaders
– Fixed shattered glass particles
– Fixed occlusion on volumetric lights
– Fixed rain visibility and the rain droplet screen effect
– Fixed The Ballad of Gay Tony vehicle headlights and taillights
– Fixed motion blur so it no longer becomes weaker at higher frame rates
– Fixed mirror reflections so they no longer distort at certain camera angles
– Fixed screen-door transparency, including LOD and object fading, as well as terrain fading
– Fixed cutscenes so the field of view no longer changes oddly at higher frame rates
– Fixed cutscenes so characters and the camera no longer judder at higher frame rates
– Fixed vehicle reflections so they are no longer jagged and restored their console-level intensity

Fusion Fix also adds a wide range of faithful graphical enhancements that bring Grand Theft Auto IV closer to a modern standard. It also reworks several broken visual effects that had issues with resolution scaling or frame-rate dependence.

New graphical enhancements
– Volumetric fog
– Sun shafts
– Anti-aliasing
– Console gamma
– Tone mapping
– CHSS shadows

Reworked graphical effects
– Reworked bloom and added a bloom toggle
– Reworked depth of field and added depth of field options
– Reworked shadows and added shadow filter options