This isn’t a confirmation, but UK retailer Zavvi has put the PC version of Metal Gear Solid: Ground Zeroes up for preorder on their website. This is very odd because MGS: Ground Zeroes hasn’t been announced for the PC… At least not yet. See the listing from Zavvi below:
The possible PC version of the game has been put up for the price of £34.95, nearly ten pounds less than the already confirmed Xbox 360 and Playstation 3 versions. Again, this could be a placeholder pre-order in case it gets announced for the PC. It’s certainly something to think about when considering which version of the game you want.