: Players could fly between cities or use a revamped airplane ticket system at airports.
While you can no longer get it from official sources, here is a deep review of what made this mod legendary and the current state of its availability.
: You could buy businesses and safehouses across all maps, with some properties generating passive income.
In September 2021, the lead developers announced the end of the project. How To Install GTA Underground for GTA SA
GTA: Underground was more than just a map extension; it was a total conversion that integrated the assets and mechanics of several classic titles into the San Andreas engine.
: It didn't just port buildings; it included city-specific pedestrians, vehicles, weapons, and radio stations from their respective games. Custom Mechanics :
: A custom fork of SA-MP allowed players to explore this massive combined world together online. The Project's Shutdown
: The mod added Liberty City (GTA III), Vice City (GTA: VC), Carcer City (Manhunt), Cottonmouth (Manhunt 2), and Bullworth (Bully).