Quote Originally Posted by Inferno. View Post
No. Why would I do that when it's got co-op built in to make it easy?
Authentic co-op is still pretty difficult. You need to stay real close to your partner or he can bleed out. Then you have to do the whole level from the start again, because no checkpoints.
So it actually doesn't make it much easier at all.

I did co-op on lower difficulties.