PlayStation 2 is the most popular gaming platform in North America, Europe/PAL territories and Japan/Asia. The PS2 is, literally, the most popular videogame console on the planet. To date, more than 101 million PlayStation 2 units and approximately one billion pieces of software for the PlayStation 2 have shipped worldwide. According to The NPD Group, an independent company that tracks videogame sales, the PlayStation 2 continues to lead console unit market share with 55.6 percent in the U.S., more than double of any other console on the market to date. PlayStation 2 also leads on the software front with nearly a 70 percent lead over any other competitor when it comes to software titles available.
This article contains statistics and other info provided by Sony Computer Entertainment America.

