Nah there are no online mods you have to unlock, if you're playing with a guest you can only play social games which has 6 different options and the new DLC heroic content if you bought the maps. The campaign however on legendary is a lot harder than heroic itself, its more like halo 1 in you don't have to go back to a check point if someone dies if you play coop like halo 2 had. if ya'll start getting the skulls for achievements turn them on and campaign scoring on to see how hard it is =P.

you know ... that is considered long...

easy and coop....

I'm about 2/3 through the game on medium/single player. I've not experienced a single noticeable framerate hitch yet. Maybe it is co-op only? Loading hasn't been an issue, either. At startup it loads a lot of content, but throughout the game, it isn't a big deal to me. Graphically, they game is hit or miss. In some places, graphics are WOW! and in others just average for a next-gen game.

I didn't think the campaign was as good as it could have been, most of the objectives were repeated (get into something, activate something and get out before the place blows), and the story wasn't that amazing. But the online multiplayer, co-op, theater and forge make up for it.

You pick easy mode and you get what want. Something quick and easy. Wouldn't it be worse if it was long and easy?