The PlayStation Camera for the PlayStation 4 is currently "severely supply constrained," Sony's Chris Norden said today during a presentation at the Game Developers Conference.

Norden, a senior staff developer support engineer at Sony, said the company underestimated demand for the peripheral. He also revealed that the camera has an attach rate of around 15 percent--that's about 900,000 units. The PS4 has sold 6 million units.

The PlayStation Camera is proving hard to find, as it's sold out as numerous retailers. Norden said "please be patient," as Sony works to replenish supply, though it's not clear when more units will be available.

Unlike the Xbox One's camera, the Kinect, the PlayStation 4 Camera is not included with PS4 units. It is sold separately for $60, though GameStop recently raised its price by $10 to $70.

Moderated - Kresnik.

Mine was free with my PS4 :)

Because crazy japanese girls

People finally realized Playstation Move is way better than Kinect. It actually works.

While that's probably not the reason, it sounds good.

Fantastic sales. almost 1 in every 6 PS4 owners bought the camera.

Why? maybe because it is an add-on.... MS was smart to package in kinect.

What the heck is that?

OT: Those are great sales. Playroom streaming so far has been a killer app, but hopefully camera features in games will be popular among consumers as well.

Well Kinect has almost sold 4 million!!! :p

Are you serious?

Twitch is clearly the reason, PS4 has had it since launch, the only other use for it is playroom, and i really doubt 900k people are desperate to play that.