GTAIV Launch Bigger Than Halo 3

When it comes to boffo openings, forget "Pirates of the Caribbean" — think "Grand Theft Auto IV."

And think $400 million for the first week, a record for vidgames and possibly the biggest debut ever for an entertainment product.

Sources close to publisher Take-Two Interactive, whose Rockstar Games label is developing and releasing the title, said that the latest installment of the hit franchise will reach that figure and sell some 6 million units after it launches worldwide on April 29.