These sales exceeded Xbox 360's launch, setting a new record for Microsoft's Xbox branch. Last week, Sony revealed that its PS4 had sold similarly -- 1 million in 24 hours.
In the last 24 hours, players have driven 3.6 million miles in Forza Motorsport 5, killed 60 million zombies in Dead Rising 3, pulled off 7.1 million combos in Killer Instinct, and slaughtered 8.5 million Ryse: Son of Rome enemies.
If you're a new Xbox One owner, be sure to check out IGN's complete Xbox One Launch Guide. If you're on the fence, check out our Xbox One Review in Progress. Mitch Dyer is an associate editor at IGN. He's currently reading Welcome to the Monkey House by Kurt Vonnegut. Talk to him on Twitter at @MitchyD.