User blog comment:Drkdragonz66/Call of Duty Ghosts confirmed to have an unknown cooperative mode/@comment-75.70.245.159-20130709155529/@comment-4778612-20130714154519

Yeah! They could be dug up in their own bases and either go attack the enemy team's base themselves or spawn NPCs (Delta, GIGN etc.) to do it for them! That'd be interesting. The major turn off for me with MW3's survival is the lack of a 4 player option and the lack of it's own uniquely designed maps.