It's this first gta sa:de mod in gta inside.

Two-Player CO-OP's script is disabled by default in the game.

Please read the notepad.

I made a mod to enable it.

How to install:

1- Download from the link below and extract the folder "Gameface" to the GTA San Andreas Definitive Edition Directory
2- Run San Andreas Defintive Edition
3- Start a new game