It's a pretty steep drop from top dog to second fiddle in NPD's May tally, apparently. According to a report from Gamasutra, Diablo 3 managed to sell one million physical copies at US retail – a fraction of the 3.5 million in physical and digital sales earned in the first 24 hours.
Coming in second and third in May respectively, Max Payne 3 and Ghost Recon: Future Soldier each sold just over 400,000 units.
Two decades have passed since the demonic lords, Diablo, Mephisto, and Baal, set out across the world of Sanctuary on a vicious rampage, twisting humanity to their unholy will. Yet for those who battled the Prime Evils, the memory fades slowly. When Deckard Cain returns to the ruins of Tristram Cathedral seeking clues to defeat new stirrings of evil, a fiery harbinger of doom falls from the heavens, striking the very ground where Diablo once entered the world. This fire from the sky reawakens ancient evils and calls the heroes of Sanctuary to defend the mortal world against the rising powers of the Burning Hells once again.