User blog comment:Drkdragonz66/Modern Warfare 3 interview: Robert Bowling talks about Spec Ops Survival/@comment-4117054-20110812201302

4 players? c mon MP is for more than 10 players, so if survival mode is in MP maps then you should be playing along whit more than 4 players. But for the balance the enemys need to be more dificult than the normal SP ones.