Sony's most important dev team in my opinion has to be naughty dog. Here are the reasons why
The orig crash games made the playstaion very popular.
Jak n Daxter franchise sold well.
Every Uncharted game has done better than the one before it.
They helped with
God of war 3, Infamous etc.
I might be biased though because they are my fav devs.
Nobody's perfect. I aint nobody!!!
Killzone 2. its not a fps. it a FIRST PERSON WAR SIMULATOR!!!! ..The true PLAYSTATION 3 launch date and market dominations is SEP 1st