That's just parody of R* North as that's the one we referred to, lol.
Yeah, it was just a joke, which Rockstar was in charge of the Max Payne series BTW?
Here's the answer to your question:
Remedy Entertainment (WIN)
Rockstar Toronto (PS2)
Rockstar Vienna (Xbox)
Rockstar Leeds (GBA)
MacSoft (MAC)
Source: Wikipedia
In case any readers don't understand, Rockstar Toronto developed the PS2 version, Rockstar Vienna developed the Xbox version, Rockstar Leeds developed the Gameboy version, and the Windows & Mac versions were developed by non-Rockstar Studios.
Now, for my favourite studio. So, IMO, almost EVERYONE reading this doesn't know this already but I'm from Toronto, Ontario, Canada. So, I would say my favourite studio is Rockstar Toronto, EVEN THOUGH I haven't played any Rockstar Games besides Grand Theft Auto (R* Toronto hasn't developed ANY GTA games, besides London 1969). My second choice would be Rockstar Leeds, since they pretty much developed the majority of the Grand Theft Auto games I've played.
BTW, Gerard, you've missed 'Rockstar New England', and seeing all the links in your chart is from Grand Theft Wiki, I've checked them and they also missed Rockstar New England. I don't know myself if Rockstar New England exists, but according to Wikipedia, it exists.