StarCraft 2: Wings of Liberty, the first installment in its long-time-coming sequel to the strategy classic. The numbers: "a day-one sales milestone of more than 1 million copies sold worldwide" and "1.5 million copies in its first 48 hours." The context: It's already the "best-selling PC game of 2010 within its first 24 hours of availability" and now holds the "record for fastest-selling strategy game of all time." With a global launch spanning five continents and over a dozen countries, not to mention a dozen years of anticipation, solid sales were to be expected.
A source inside Blizzard confirmed the information with Joystiq, saying that approximately 1.2m StarCraft 2 accounts had been activated – not necessarily sold! – worldwide as of 4pm PT on the 28th, less than two days after the game went on sale. Roughly 620K of those accounts were in the US. Now that we're a full week out from launch, it's anyone's guess how many copies have been sold by now ... though we imagine if sales keep up, it won't take long for Blizzard to share its success again.