The enterprise-monitoring NPD Group pegs the MMORPG collection' lifetime US retail income at eight.fifty nine million thru July 2009. Indeed, all 3 video games continuously rank withinside the pinnacle 10 of the NPD Group's month-to-month PC charts, with the monitoring company placing Wrath of the Lich King as the second one quality-promoting computing device sport for the primary 1/2 of of...