Originally Posted by ToddMcF2002
So sorry for being late to this party but… Is all this awesomeness available in single player as a party based game? That would blow otherwise. All this multiplayer talk is a drag…

From Sven's Twitter

Yes, the game is very much intended to be played in single player, offline, but when you want up to 4 can play together.

So yeah, while having control of two guys is important, you can do it as single player if you want, you just control both guys. I think.