A new "Grand Theft Auto" video game goes on sale Monday. Some stores plan to open at midnight Monday night to get a jump start on what's expected to be record-breaking sales. "Grand Theft Auto 4: Liberty City" could become the fastest selling videogame of all time. At least six million copies are expected to be sold in the first week of its release. The newest version has a "mature" rating for its graphic violence. Stores are not to sell the game to anyone under the age of 17.