What Sci-fi game is this?

I saw the advert for it years ago (probably about 2007 - 2008). It had aliens but monsterish ones. It looked like a first person shooter but I'm not sure. The advert started (I think) with black and white films of a BBQ and a spaceship appearing in the air above them (again that might of been my imagination). It went on to explain how humanity was now just a mutilated mass or something like that, and all they could hope to do was fight. If anyone has any idea what game it is then please answer, because I'm really curious and remember the trailer scaring the hell out of me. Note - it is not Destroy All Humans.