There are 12 series on Grand Theft Auto + 1 what Take Two is making to PSP. And they are:

Grand Theft Auto
Grand Theft Auto: London, 1969
Grand Theft Auto 2
Grand Theft Auto III
Grand Theft Auto: Vice City
Grand Theft Auto Double Pack
Grand Theft Auto: San Andreas
Grand Theft Auto Advance
Grand Theft Auto: The Classics Collection
Grand Theft Auto: The Trilogy
Grand Theft Auto: Liberty City Stories
Grand Theft Auto: Vice City Stories
Grand Theft Auto IV

About how many Grand Theft Autos will come more??? But anyway they will be great and a lot of people want them, not to talk fans, they will even kill, if they don't get one!