The lights are on
In a tweet, Metal Gear creator Hideo Kojima posted a picture that seems to reveal exclusive PlayStation platform feature for Metal Gear Solid: Ground Zeroes.
The tweet, which you can see here, showed a picture of a display for Ground Zeroes with a screen that displayed some marketing bullet points for the game. The last one appears to read: "Exclusive Content For PlayStation Platform."
I've zoomed in an sharpened the image below and I'm convinced. You can judge for yourself. Here's a link to a larger version as well.
Our Take: Kojima likes to tease things on Twitter, so I'm not surprised he let this leak out this way. Whether a mistake or planned, it does appear to be legitimate in my estimation. Also, Metal Gear as a series has always tended to place a greater emphasis on PlayStation as a platform.