Click when prompted to generate the xinput1_3.dll file. Map Buttons :

Note: For the modern "Complete Edition" of GTA IV, newer mods like

While there are newer tools like x360ce, XinputEmu 3.0 holds a special place for GTA IV players. Version 3.0, in particular, is renowned for its stability with the game's specific engine (RAGE). It bypasses the need for complex configuration software, allowing gamers to use their preferred hardware without buying a new controller.

(often referred to as the Xbox 360 Joystick Emulator) is a wrapper tool designed to bridge this gap. It translates the signals from your DirectInput controller and "tricks" the game into thinking you are using a legitimate Xbox 360 pad.

In XinputEmu.ini , verify that TriggerMode=Analog . Also check that your controller actually sends analog trigger values – test in Windows “Set up USB game controllers” first.