How many players can play Call of Duty: Black Ops 2 in online co-op?.How many players can play Call of Duty: Black Ops 2 via system link or LAN for Co-Op?.How many players can play Call of Duty: Black Ops 2 locally (couch co-op)?.Does Call of Duty: Black Ops 2 feature a co-op campaign?.This is everything you need to know about Call of Duty: Black Ops 2's cooperative experience spelled out in plain English. We've compiled a handy FAQ as a compendium to our database entry. Well, you are on a bus, the zombies are trying to get a free ride. Call of Duty: Black Ops 2 ushers in the return of the cooperative Zombies mode.