Unfortunately, it’s the one that very few of us care about.
Now if you preorder Homefront (from OnLive, I’d assume), you get the OnLive game system free, as well as a full play pass for Metro 2033. I’ve never used an OnLive system myself, but from what I hear, it hasn’t exactly taken off like they hoped it would. But this is a pretty good opportunity to try it, if you’re at all interested. And you’re getting Metro 2033 for free as well, and seeing as how much of a mixed reputation it has, that seems like another good opportunity to try something that not everyone seemed to care for.
Homefront comes out March 15 in North America and March 18 in Europe, so get those preorders ready.