Uncharted, God of War, Gran Turismo.
http://www.gamezone.com/news/uncharted-vs-gears-of-war-lifetime-sales-comparison
"Released in October 2009, NDP Group's sales data showed Uncharted 2 was the top-selling game in the U.S. for the month of October that year with 537,000 units sold. About a month later Senior Vice President of Business Development at Sony Computer Entertainment Phil Rosenberg reported Uncharted 2 had crossed the one million sold mark on November 12, 2009, becoming the third first-party title on PS3 to sell over 1 million units in North America. On February 2010, it was reported that Among Thieves sold over 3.5 million copies worldwide. At the time it was the fastest selling first-party title on any PlayStation platform, but today it took only Uncharted 3 one day to accomplish those sales."
This is a dirty search, not sure if the site is accurate, but UC 1 and 2 didn't do so hot really, but 3 did great! The quote if accurate is stunning though, did it really take until 2009 to have a first party title break 1 million units sold in NA?