- The co-op missions in Battlefield 3 take place in the same world as the single player campaign, and follows a unique series of events that lead up to an explosive finish. Players in co-op will take the role of soldiers that are not tied to any one particular branch of the Armed Forces. This is an intentional design decision to allow for a vast variety in gameplay in the different co-op missions.
David Spinnier, Lead Co-op designer, said that this game mode was designed with having a tough challenge in hand, and compared to the Single Player it will feature shorter missions that are aimed to be replayed several times. The player can tag along with a friend, fight together and die together. Score from the mission will be summed up and uploaded to Battlefield 3's social hub Battlelog. Here you can see your friends' records to try to beat them.
Since the missions are aimed for replayability, Spinnier told the Battleblog that each will feature randomized elements to make each experience different.
If this is not enough, weapon unlocks you obtain through the Co-op will carry on to the Multiplayer experience. This to encourage and reward players that like to spend time playing this mode. We must take into account that now unlocks are aimed to be harder to achieve.
To read the rest of the Battleblog, check it out here.