For starters, let's take a look at the co-op.  What's that?  Well yes, dear reader, that does indeed say nine player co-op.  That means you plus eight of your closest cowpokes can take on all the ne'er-do-wells the frontier has to offer.  Outside of MMOs, I can't say that I've played too many co-op games with more than about six people, so I imagine things get frantic quicker than an [INSERT WILD WEST COLLOQUIALISM].  Let's check out the trailer to see how accurate that is:

The story starts with the evil railroad baron Clayton Boon trying to build a track leading straight to Hell. Nobody else has done it, so he'll totally have a monopoly on the hot coal importing marketplace. Before he can lay the first track, a crazed shaman with a posse of psychopaths raised from the dead (you read that right) are going to stop him. Fighting across the wild west, it's nutjobs versus corporate greed with enough shooting to qualify for a whole fistful and a half of guns.