The game has a mission based structure with some taking longer than others (especially if we die & have to respawn to the last checkpoint). There have been some nice gameplay moments which include a nice driving section with the other player on a mounted gun & a slide down a hallway with a building exploding (reminds of some gameplay I saw on Bulletstorm).
The game seems to have done away with the back to back feature from the previous game which had you taking out a large number of enemies whilst having your back to your co-op partner.
Earlier in the game there was a mission set in the past in which we rescued a hostage named Fiona who we now meet up five years later & she informs us of the cartel's hideout which is in a church.
