OK gotta ask please explain or better still a link to what you mean. Thank you.
Campaign = a game or collection of games where one mission follows on from another maybe keeping in mind casualties/developments etc. Bad Company = reference to a Xbox 360/PS3 game (came out ten years ago now) about a ultra modern war where 4 US army miscreants end up behind enemy lines and somehow manage to shoot their way through 50% of the Russian army (and loads of rebels etc).