NewBeginning

I'm really confused by these explanations. I'm up to 4-2 in the Government quests, and I haven't seen any of the old Hunter's Guild quests anywhere. What is a single player room? Is that the same as a normal room, but with a password? What are one player missions? I've never seen anything like that. Edit: I figured it out. I guess I just always thought everything was going to be available in a normal game. But glad I can do them now. These quests bring back memories.