Originally Posted by TAI JASON
Thats why it called "insane" you know?! Get yourself 3 good players and play on arcade mode with unlimited respawns.
It's cheap though in the way that COD is cheap on veteran, with infinite respawns and crappy A.I that is impossibly good which 1 & 2 didn't do. I'm up to act 4 now though but the worst is yet to come, if anything i think it might be easier on singleplayer, although does it work in arcade mode for the achievement?
If so i might spare myself the torment.