Well, why not?
And why is that significant? Because up until now, we all assumed Rockstar North was the only team cranking away on the GTA installment; hence, it seems multiple Rockstar studios are collaborating on the huge title. Then again, both teams came together for Red Dead Redemption , too (where Rockstar San Diego was the primary group). Also, if you watch the closing credits of the recently released Max Payne 3 , you'll note that multiple Rockstar development studios worked on that one as well.
So it's all one big party, apparently. And when it comes to what we consider the most consistently quality developer of the generation , we have no qualms whatsoever about inter-company collaboration. Do you?
Related Game(s): Grand Theft Auto V