How do i play coop

[sl4yer_jeff]

I don't know how to play coopération can anyone help?

[kanana]

do you mean zombies

[sl4yer_jeff]

kanana i know how to play zombies but is the cooperation available??

[Nice -XIX-]

you can play coop first you need to enable UPnP from the router site for example 192.168.1.1 then add the friend who you want to play with(follow him in plutonium to add him) then on the main menu click on friends and game invite then voila you can play now
note: this is not the only way to play coop if this method not worked for you watch this video https://www.youtube.com/watch?v=oLekKkhiZk4
if hamachi didn't work you can use Radmin VPN(it's not a VPN it's only named Radmin VPN) I recommend to use Radmin VPN because it's easy and fast