"Launched at the end of 1996, the original Diablo helped popularize the action role-playing-game genre, earning widespread critical and commercial success. The game's sequel, Diablo II, shipped in 2000 to similar acclaim, winning several Game of the Year awards and at the time becoming the fastest-selling computer game ever. Diablo II's award-winning expansion set, Diablo II: Lord of Destruction™, debuted in 2001, becoming Blizzard Entertainment's sixth-consecutive #1-selling game. To date, the franchise has sold more than 18.5 million copies worldwide.* Diablo's gothic horror theme has also inspired a number of licensed products, including novels and action figures."
http://eu.blizzard.com/en-gb/company/press/pressreleases.html?id=2443828
You should try a bit harder, don't you think?
Now this is 2008 press release. It's been four years, and during that time has been a NPD PC top ten seller in 2010.
etc etc etc. The announcement of diablo 3 only increased sales of diablo 2.
