It goes without saying that Diablo 3 has endured a rocky launch thus far, but despite all the cries from fans over server outages and the lack of an ‘offline’ mode, the title has been a huge boon financially for Blizzard. The company announced today that over 3.5 million copies were sold on day one, making it the fastest-selling PC effort to date.

It’s worth noting that the count does not include copies that given out as part of the World of Warcraft Annual Pass promotion, which 1.2 million players took advantage of, bringing the day one tally to an impressive 4.7 million. Post-launch sales haven’t showed any signs of slowing down either, with Blizzard reporting a total of 6.3 million copies sold with first week sales added in.

In a statement, Blizzard CEO Mike Morhaime acknowledged the raft of issues that Diablo 3 players experienced during the launch hours, which seem to have settled down since.

“We also regret that our preparations were not enough to ensure everyone had a seamless experience when they did so,” said Morhaime. He added, “I want to reaffirm our commitment to make sure the millions of Diablo III players out there have a great experience with the game moving forward, and I also want to thank them for their ongoing support.”

As any Blizzard fan knows, the company has a strong commitment to polish. We’d expect more refinements to be made as the company takes in feedback from the community. Later this month, Blizzard will launch the in-game Diablo 3 Auction House – allowing players to buy and sell items with real money or Battle.net credits.

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