Modern Nvidia/AMD cards hate GTA IV's DX9. Download d3d9.dll from DXVK (Vulkan backend) or Dax wrapper. Place it in the root folder. This boosts FPS from 40 to 144 instantly.
9.5/10 (Docked 0.5 because you still need a third-party mod to fix shadow pop-in). grand theft auto iv the complete edition v12032 repack
The crack (usually LaunchGTAIV.exe ) triggers false positives. Add the download folder to exclusions before unpacking. Modern Nvidia/AMD cards hate GTA IV's DX9