Call Of Duty World At War Multiplayer question

[DeannaF7]

I just got a PS3 and bought Call of Duty 5 and I read about a zombie mode and was wondering how many players can play using one system?
Thanks

 

[snakelda]

I tried the zombie mode in Splitscreen and it would only allow two people. In online multiplayer,I believe it's four.You also have to beat the Single Player to unlock Zombie Mode. If one of your friends invites you to play Zombie mode, you can play it with them.