Thank you for coming to the fold, Arthas.

Although the list's producers NPD Group, who are the list's organizers NPD Group, do not provide weekly numbers of sales this signifies that Lich King, which is already the top-selling PC game of all time -- will continue to add significantly to Blizzard's close-to-$100 million in monthly revenues. The total is increased by the sales of the popular combination packs WoW Cataclysm Classic: Battle Chest (fourth) as well as the A la carte WoW Cataclysm Classic (eighth).

https://www.mmoexp.com/Wow-cata-classic/Gold.html