Interestingly, fewer than half the people who bought the game played the game online, according to Sony
UNCHARTED 2: Among Thieves has also garnered more than 150 other industry awards, has over 1.5 million online users worldwide, and has surpassed 3.5 million copies sold worldwide – the fastest selling first-party title for PlayStation. Not to mention, it’s established a new standard for games developed on the PS3 platform.
http://blog.us.playstation.com/2010/02/make-believe-from-programmer-to-naughty-dog-co-president/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+PSBlog+%28PlayStation.Blog%29&utm_content=Google+Feedfetcher