The game was followed by two DLC packs called The Lost and Damned and The Ballad of Gay Tony, both of which occur at the same time as GTA IV. The HD Universe started out in 2008 with the release of Grand Theft Auto IV. The generation comprising the games set in HD Universe is the HD era, previously known as GTA IV era. It is named for the high-definition 3D graphics introduced in it. The HD Universe is the official name of the third and current canonical universe of Grand Theft Auto series, after the 2D Universe and the 3D Universe. ” - Niko Bellic in GTA IV's first trailer, ' Things Will Be Different'.
