The global mod modifying the game to unrecognized is the Yandere Simulator port on GTA 3.

Mod requires clean without mods GTA 3.

Installation.
Unpack the contents of the archive, run the unzipped installer and install it into the root of the game folder confirming the replacement of files,
after that the next installer will start and click the install button to complete the installation. After installation, a shortcut will be created on the desktop.