Oh god. So, it releases on the 16th, right? Can't play it until then?
WELL I HAVE SOME NEWS FOR YOU!!
I am very grateful to Fuzion FuZSion* FuZSion Fuzsion for showing me this. Just go to their website (http://www.jc-mp.com/ (http://www.jc-mp.com/)) and click the button to get the key. Log in through Steam. Activate the key. Download the 26MB mod. Play it. Be epic.
EDIT: As TehHank kindly demonstrated, you do, in fact, need the original game, Just Cause 2. This is a multilayer mod. Sorry I wasn't as clear.
I told Fuzion FuZSion* FuZSion Fuzsion to post this because I was lazy, but he told me to do it because he was lazy.