Microsoft's GDC keynote speaker, John Schappert has announced that the Xbox 360 has reached another milestone, over 18 million units sold worldwide.
The speaker also went on to say that the company would probably not even bother with an external Blu-ray drive for the console simply because the HD DVD add-on sold poorly.
"We have no plans to announce anything like that right now. But I'd also urge you to look at the attach rate for the HD-DVD drive," he noted. "It was a 3 percent attach rate...you also have to take into account how did the other accessory do when you look at the future."












