Solo.
I would very much like to play it with friends and might end up playing a little bit of it in Coop - however, my go to gaming buddies live now on other ends of the globe + plus there is no way we will be able to playthough a lengthy campaign. In both D:OS1&2 all my coop campaigns lasted at most until the end of chapter1. I don't think games that last more then one 10h are good fits for coop - not for me at least.
