How do you get downloadable content in gta iv?

To get downloadable content (DLC) for Grand Theft Auto IV, you can purchase it through the Xbox Live Marketplace or PlayStation Store, depending on your console. The main DLCs, "The Lost and Damned" and "The Ballad of Gay Tony," are also available as part of the "Episodes from Liberty City" package, which can be bought as a standalone disc or digital download. Make sure your game is updated and your console is connected to the internet to access the content.