The locations are ripped from other parts of the game and are extremely combat heavy. And once you're past that initial cutscene, any additional dialogue is delivered via radio chatter. If you're into the combat of Halo and like playing with others against occasionally overwhelming batches of enemies, the missions are passable. But don't go in thinking that this is some sort of elaborate and unique segment of the game that's going to give you a campaign-level experience. It's a set of co-op missions with a loose story wrapper around it, nothing more, nothing less.