Most Grand Theft Auto games are set in fictional parodies of well-known United States cities, in a number of different time periods. The games are split into three different universes (2D, 3D, and HD), each with their own reinterpretations of previously established settings. The universes share the names of cities, several brands, and background characters who never make physical appearances in the games (with a few exceptions), but are otherwise considered to be separate continuities.[1]