Blizzard Entertainment has announced that its hugely successful World of Warcraft MMORPG title has surpassed another historic milestone for subscribers. The new high was reached shortly after the launch of the second expansion pack for WoW called Wrath of the Lich King.

WoW now counts 11.5 million subscribers worldwide. DailyTech reported in late October that WoW had reached the 11 million subscriber mark. The huge success of the Wrath of the Lich King expansion pack boosted the subscribers to the game by half a million in slightly more than a month.

Wrath of the Lich King set an all time 24 hour sales record for PC video games, besting the previous top selling PC title for the same time period -- the first WoW expansion pack. Blizzard says the expansion pack has now sold over 4 million copies after moving 2.8 million the first 24-hours it was available.

CEO and cofounder of Blizzard, Mike Morhaime said in a statement, "We’re pleased to welcome the new and returning players who have helped World of Warcraft reach these new milestones, and we appreciate the enthusiasm and support that the game’s global community has continued to show. We look forward to providing all of them with an excellent entertainment experience for a long time to come."