I've run through the whole campaign on insane to get the onyx medal for it. BUT, I'm stuck on the very last "mission" (where you fight myrrah and her guards as well as the lambent), as I either focus on Myrrah and get killed or the guards and Myrrah kills Adam.
I do not care if we utilize all the easy mutators etc as long as we can do it on insane
Oh, unfortunately my mic has broken down and I do not get another before next friday/saturday..
Send me a message if you are interested, and I'll be on later tonight
GT same as here: SweeeterTundra