SAN FRANCISCO, Sept 21: Grand Theft Auto V has crossed the $1 billion sales mark after three days in stores, a rate faster than any other video game, film or other entertainment product has ever managed, its creator Take Two Interactive Inc said yesterday. The latest installment of GTA, a cultural phenomenon that has sparked a national debate on adult content and violence, received strong reviews and racked up 800 million dollar in first-day sales alone. (agencies)