I think to really get the most out of the game you have to play co-op. I started playing it solo and it was just alright. mindless hack and slash. Then I called by friend to stop by over the weekend and we started the campaign co-op and it turned out to be a lot more fun. The fights are harder and you have more enemies to deal with. Its fun to try and work together to position for sneak attacks or help heal and pull mobs off each other. Its still an ok game even then, it had its bugs which got frustrating, but its was a lot more fun playing co-op than solo. I would like to try a 4 player group.