When ever i try to play multi player it pops up with "Serial code already in use". I bought this game from steam.
Anyone know why ? or does anyone has this problem

same problem here

It s because your key isn t save on your DD, if you have this problem, you must have the "re enter key" problem when you re going into multiplayer.

To fix it, launch your game as Admin, go in multiplayer, enter your key, go in SOLO, go again in multiplayer, enter again your key, exit, launche again the game as admin and all lmust be good now...

I've got the same problem, but the message "Serial code already in use" appears when I try to join a server. I cant play multiplayer because of this