Xbox 360 Bromageddon



Bromageddon is an achievement you can get in Halo 4 for completing the campaign cooperatively on either Heroic or Legendary. Has anyone done this? Is it any easier/harder than playing alone? I played through the game solo, so obviously I didn't get the achievement, but me and a buddy of mine are thinking about running through the campaign again to get the 40 points.
I haven't done it yet, but I've got a friend that likes to play Halo 4 coming down to spend the night tonight, so we might work on that achievement some tomorrow afternoon.
I got this achievement right before I bought Black Ops II. We bought Halo 4 about a week beforehand and beat the campaign on solo, then teamed up to beat it in coop mode.