Downgrading the games
If you own GTA 3, Vice City, or San Andreas on Steam, Rockstar Launcher, or on CD/DVD, you can use these exe files to make the game compatible with GTA Connected:
GTA III
GTA Vice City
GTA San Andreas
If you own GTA 3, Vice City, or San Andreas on Steam, Rockstar Launcher, or on CD/DVD, you can use these exe files to make the game compatible with GTA Connected:
GTA III
GTA Vice City
GTA San Andreas