My friend and I are having troubble playing d2 on nightmare difficulty. He cannot join my game, he only gets a message that says, Invalid game name. And I cant join him.
We have just completed the game on normal difficulty, all the quests is done and all the waypoints are taken.
I dont understand what the problem is, we are doing the exact same thing as when we create a normal game. Just change the difficulty settings.
Is there anyone that knows what we may be doing wrong ?