of jumping in and out of games co-op online.  No game has ever done it so smoothly that I know of.  The fact that someone can join your single player game without having that split screen crap (which I f'n hate) is brilliant.  Not only that, but the story seemed built around two players unlike the cut scenes and whatnot in Halo 2 where the guys are talking to Master Chief.

I definitely think Gears lays claim to being the first to make this very innovative change because I sure as hell have never had this experience before.

Porn is my porn. Gears is pretty awesome, though.