I have the same problem.

I'm very disappointed, I bought this game yesterday to play in coop with a friend (for my christmas's holiday...). But each time I try, I have this (very simple) error : "Erreur de connection".

I'm from Belgium and my internet provider is "Voo" (my friend has Belgacom as provider) and my NAT is OPEN (my friend too).

I saw on the thread that the game used "Direct IP", I never had to use that, but I can do a translation NAT on some PORT on my router. If you think that a possible solution, could you tell me what port(s) (UDP) is/are used by the game?

In any case, I hope the patch (or the translation NAT) can resolve this big issue ...

Last edited by mrfabzzz; 21/12/15 06:51 PM.