Obviously its not oficial, but like ViciousLuke said, it doesnt mean that isnt truth. I believe that who did this has a goal. I mean, why create this believing only on rumours? Its really something about PC version or just a prank.
Read the article above, the site has links to a company who deal in youtube views. Now let's stop talking about that site and that fake Steam screenshot and get with the verifiable facts
So the goal is merchandising.