Long-awaited RPG Diablo 3 is the fastest selling PC game of all time, according to developer Blizzard Entertainment.
The game, which was plagued by launch hiccups and online hacks, sold more than 3.5 million copies in a single day, Blizzard claimed.
The California developer claims that such a sales feat makes it the fastest selling game ever on PC.
An additional 1.2 million customers received Diablo III from signing up to the World of Warcraft Annual Pass promotion, taking the launch total to 4.7 million.
By the end of the first week, sales had passed 6.3 million copies, the company added.
The sales have also demonstrated the increasingly diminishing relevance of the retail PC charts. Diablo 3, as a packaged product, entered the UK charts at number two behind Max Payne 3.
"We're definitely thrilled that so many people around the world were excited to pick up their copy of Diablo III and jump in the moment it went live," said Blizzard CEO Mike Morhaime.
"We also regret that our preparations were not enough to ensure everyone had a seamless experience when they did so. 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."